SECTION 6 - ENGINE GENERAL INFORMATION AND

DIAGNOSIS

1. GENERAL INFORMATION

1.1 STATEMENT ON CLEANLINESS AND

CARE

1.2 GENERAL INFORMATION ON ENGINE

SERVICE

1.3 PRECAUTION ON FUEL SYSTEM

SERVICE

1.4 FUEL PRESSURE RELIEF PROCEDURE

1.5 FUEL LEAKAGE CHECK PROCEDURE

2. ENGINE DIAGNOSIS

2.1 GENERAL DESCRIPTION

2.2 ON-BOARD DIAGNOSTIC SYSTEM

Data Link Connector (DLC)

2.3 PRECAUTION IN DIAGNOSING

TROUBLE

2.4 ENGINE DIAGNOSTIC FLOW TABLE

Customer Problem Inspection Form

(Example)

Malfunction Indicator Lamp (MIL)

Check

Diagnostic Trouble Code (DTC)

Check

Diagnostic Trouble Code (DTC)

Clearance

Diagnostic Trouble Code (DTC)

Table

Fail-safe Table

Visual Inspection

Engine Basic Inspection

Engine Diagnosis Table

2.5 TECH 2 DATA

Tech 2 Data Definitions

2.6 INSPECTION OF ECM AND ITS

CIRCUITS

Voltage Check

Resistance Check

2.7 COMPONENT LOCATION

2.8 TABLE A-1 MALFUNCTION INDICATOR

LAMP CIRCUIT CHECK Lamp Does

Illuminate with Ignition Switch ON

(Engine Not Running)

Wiring Diagram

Circuit Description

Inspection

2.9 TABLE A-2 MALFUNCTION INDICATOR

LAMP CIRCUIT CHECK Lamp Remains

ON After Engine Starts

Wiring Diagram / Circuit Description

Inspection

2.10 TABLE A-3 MIL CHECK MIL Flashes With

Ignition Switch ON

Wiring Diagram / Circuit Description

Inspection

2.11 TABLE A-4 MIL CHECK MIL Does Not

Flash or Remains ON Even with

Grounded Diagnosis Switch Terminal

Wiring Diagram / Circuit Description

Inspection

WARNING:

For vehicles equipped with Supplementary Restraint (Airbag) System:

• Service on and around the airbag system components or wiring must be performed only by an

authorised HOLDEN retailer. Refer to AIRBAG SYSTEM COMPONENTS and WIRING LOCATION

VIEW under GENERAL DESCRIPTION in Section 10B AIRBAG SYSTEM in order to confirm

whether you are performing service on or near the airbag system components or wiring. Please

observe all WARNINGS and SERVICE PRECAUTIONS under ON-VEHICLE SERVICE in Section

10B AIRBAG SYSTEM before performing service on or around the airbag system components or

wiring. Failure to follow WARNINGS could result in unintentiona l activation of the system or c ould

render the system inoperative. Either of these two conditions may result in severe injury.

•

Technical service work must be started at least 90 seconds after the ignition switch is turned to

the LOCK position and the negative cable is disconnected from the battery. Otherwise, the sys-

tem may be activated by reserve energy in the Sensing and Diagnostic Module (SDM)

IMPORTANT:

Prior to connecting Tech 2 to the vehicle, refer to Section 0C TECH 2.

2.12 TABLE A-5 ECM POWER AND

GROUND CIRCUIT CHECK MIL Doesn’t

Illuminate with Ignition ON and Engine

Won’t Start Though it is Cranked

Wiri ng Diagra m

Circuit Description

Inspection

2.13 DTC P0105 (DTC NO.11) MANIFOLD

ABSOLUTE PRESSURE (MAP) CIRCUIT

MALFUNCTION & DTC P0106 (DTC

NO.11) MANIFOLD ABSOLUTE

PRESSURE (MAP) RANGE /

PERFORMANCE PROBLEM

Wiring Diagram / Circuit Description

DTC Confirmation Procedure

Map Sensor Individual Check

Inspection

2.14 DTC P0110 (DTC NO.18) INTAKE AIR

TEMP. (IAT) CIRCUIT MALFUNCTION

Wiring Diagram / Circuit Description

DTC Confirmation Procedure

Inspection

2.15 DTC P0115 (DTC NO.19) ENGINE

COOLANT TEMPERATURE (ECT)

CIRCUIT MALFUNCTION

Wiring Diagram / Circuit Description

DTC Confirmation Procedure

Inspection

2.16 DTC P0120 (DTC NO.13) THROTTLE

POSITION CIRCUIT MALFUNCTION

Wiring Diagram / Circuit Description

DTC Confirmation Procedure

Inspection

2.17 DTC P0130 (DTC NO.14) HEATED

OXYGEN SENSOR (HO2S) CIRCUIT

MALFUNCTION

Wiring Diagram / Circuit Description

DTC Confirmation Procedure

Inspection

2.18 DTC P0135 (DTC NO.14) HEATED

OXYGEN SENSOR (HO2S) HEATER

CIRCUIT MALFUNCTION

Wiring Diagram / Circuit Description

DTC Confirmation Procedure

Inspection

2.19 DTC P0325 (DTC NO.17) KNOCK

SENSOR CIRCUIT MALFUNCTION

Wiring Diagram / Circuit Description

DTC Confirmation Procedure

Inspection

2.20 DTC P0335 (DTC NO.23) CRANKSHAFT

POSITION (CKP) SENSOR CIRCUIT

MALFUNCTION

Wiring Diagram / Circuit Description

Reference

DTC Confirmation Procedure

Inspection

2.21 DTC P0340 (DTC NO.15) CAMSHAFT

POSITION (CMP) SENSOR CIRCUIT

MALFUNCTION

Wiring Diagram / Circuit Description

Reference

DTC Confirmation Procedure

Inspection

2.22 DTC P0500 (DTC NO.16) VEHICLE

SPEED SENSOR (VSS) MALFUNCTION

Wiring Diagram / Circuit Description

DTC Confirmation Procedure

Inspection

2.23 DTC P1450 BAROMETRIC PRESSURE

SENSOR LOW/HIGH INPUT

Wiring Diagram / Circuit Description

DTC Confirmation Procedure

Inspection

2.24 TABLE B-1 FUEL INJECTOR CIRCUIT

CHECK

Wiring Diagram

Inspection

2.25 TABLE B-2 FUEL PUMP AND CIRCUIT

CHECK

Wiring Diagram

Inspection

2.26 TABLE B-3 FUEL PRESSURE CHECK

Wiring Diagram

Inspection

2.27 TABLE B-4 IDLE AIR CONTROL SYSTEM

CHECK

Inspection

2.28 TABLE B-5 A/C SIGNAL CIRCUITS

CHECK (VEHICLE WITH A/C)

Inspection

2.29 TABLE B-6 ELECTRIC LOAD SIGNAL

CIRCUIT CHECK

Inspection

2.30 TABLE B-7 RADIATOR FAN CONTROL

SYSTEM CHECK

Inspection

3. SPECIAL TOOLS

1. GENERAL INFORMATION

1.1 STATEMENT ON CLEANLINESS AND CARE

An automobile engine is a combination of many machined, honed, polished and lapped surfaces with toler-

ances that are measured in the thousands of a millimetre.

Accordingly, when any internal engine parts are serviced, care and cleanliness are important.

Throughout this Section, it should be understood that proper cleaning and protection of machined surfaces

and fric tion ar eas is part of the repair proced ure. T his is cons ider ed s tandard sho p pra ct ice eve n if not sp ecif-

ically stated.

• A liberal c oating of engin e oil shoul d be applied to fric tion areas d uring assem bly to protect and lubricate

the surfaces on initial operation.

• Whenever valve-train components, pistons, piston rings, connecting rods, rod bearings, and crankshaft

journal bearings are removed for service, they should be retained in order.

At the time of installation, they should be installed in the same locations and with the same mating sur-

faces as when removed.

• Battery cables should be disconnected before any major work is performed on the engine.

Failure to disconnect cables may result in damage to wire harness or other electrical parts.

• The four cylinders of the engine are identified by

numbers; No.1 (1), No.2 (2), No.3 (3) and No.4 (4)

counted from crankshaft pulley side to flywheel side.

1.2 GENERAL INFORMATION ON ENGINE SERVICE

THE FOLLOWING INFORMATION ON ENGINE SERVICE SHOULD BE NOTED CAREFULLY, AS IT IS

IMPORTANT IN PREVENTING DAMAGE, AND IN CONTRIBUTING TO RELIABLE ENGINE PERFOR-

MANCE.

• When r aising or supp orting the e ngine for any r eason, do no t use a jack under the oil pan. Due to small

clearance between oil pan and oil pump strainer, jacking against the oil pan may cause it to be bent

against the strainer resulting in a damaged oil pick-up unit.

• It should be k ept in m ind , while wor king o n the engi ne, that t he 12 -v olt el ec tric al syst em i s capable of v io-

lent and damagi ng sh or t circuits.

When performing any work where electrical terminals can be grounded, the ground cable of the battery

should be disconnected at battery.

• Any time the air cleaner, throttle body or intake manifold is removed, the intake opening should be cov-

ered. This will protect against accidental entrance of foreign material which could follow the intake pas-

sage into the cylinders and cause extensive damage when engine is started.

1.3 PRECAUTION ON FUEL SYSTEM S ERVICE

• Work must be done with no smoking, in a well-ventilated area and away from any open flames.

• As the fuel feed line (between fuel pump and fuel delivery pipe) is under high fuel pressure even after

engine wa s stopped, loosenin g or disconn ecting the fuel feed line di rectly may cause a da ngerous spout

of fuel to occur where loosened or disconnected.

Before loosening or disconnecting the fuel feed line, make sure to release the fuel pressure, refer to

1.4 FU EL PRES SU RE RELIE F PRO CED URE. A small amou nt of fuel may be released afte r the fuel lin e

is disconnected. In order to reduce the chance of personal injury, cover the fitting being disconnected with

a shop cloth. Put that cloth in an approved container when disconnection is completed.

• Never run the engine with the fuel pump relay disconnected when the engine and exhaust system are hot.

• Fuel or fuel vapour hose connections vary with each type of pipe. When reconnecting a fuel or fuel vapour

hose, connect and clamp each hose correctly, refer to the hose connection figure.

After connecting, make sure that it has no twists or kinks.

• When installing an injector or fuel delivery pipe, lubricate its O-ring with spindle oil or gasoline.

Legend

[A] Short pipe, fit hose fully onto pipe. 1. Hose

[B] Continuing pipe, fit hose onto the projection. 2. Pipe

[C] Bent pipe, fit hose onto bent area or 20 - 30mm. 3. Clamp

[D] Straight pipe, fit hose 20 - 30mm onto the pipe. 4. Clamp securely 3 - 7 mm from hose end

5. 20 - 30 mm

1.4 FUEL PRESSURE RE LIEF PROCEDURE

CAUTION:

This work must not be done when the

engine is hot. If done so, it may cause an adverse

effect to ca talyst.

After maki ng sur e the e ngine is col d, releas e the fuel p res-

sure as follows.

1. Place the transmission in Neutral (P range for A/T), set

the parking brake and the block drive wheels.

2. Remove the relay box cover.

3. Disconnect the fuel pump relay (1) from the relay box.

4. Remove the fuel filler cap to release fuel vapour

pressure in the fuel tank and then reinstall it.

5. Start the engine and run it unt il it stops for lack of fuel.

Repeat cran king engin e 2-3 times for ab out 3 seconds

each time to dissipate fuel pressure in the lines. Fuel

connections are now safe for servicing.

6. Upon completion of servicing, the connect fuel pump

relay (1) into relay box and install the relay box cover.

1.5 FUEL LE AKAGE CHECK PROCEDURE

After performing any service on the fuel system, check to make sure there are no fuel leakages as follows.

1. Turn the ignition switch ON for 3 seconds (to operate the fuel pump) and then turn it OFF.

Repeat this (ON and OFF) 3 or 4 times and apply fuel pressure to fuel line (until fuel pressure is felt by

hand placed on fuel feed hose).

2. In this state, check to see that there are no fuel leakages from any part of the fuel system.

2. ENGINE DIAGNOSIS

2.1 GENERAL DESCRIPTION

The engine and emission control systems in this vehicle are controlled by the ECM. The ECM has an On-

Board Dia gno sti c sy s tem whic h d ete cts a m al functi on i n th is sys tem and abn or mal ity o f tho se parts that inf lu-

ence the engine exhaust emission. When diagnosing engine troubles, have a full understanding of the outline

of the On-Board Diagnostic System and each item in 2.3 PRECAUTION IN DIAGNOSING TROUBLE and

execute diagnosis according to 2.4 ENGINE DIAGNOSTIC FLOW TABLE.

There is a close relationship between the engine mechanical, engine cooling system, ignition system, exhaust

system, etc. and the engine and emission control system in their structure and operation. In case of an engine

trouble, even when the malfunction indicator lamp (MIL) doesn’t turn ON, it should be diagnosed according to

this flow table.

2.2 ON-BOARD DIAGNOSTIC SYSTEM

ECM diagnosis troubles which may occur in the following

areas when the ignition switch is ON and the engine is run-

ning, is indica ted by the tur ning on or fla shing the mal func-

tion indicator lamp (1).

• Heated oxygen sensor

• ECT sensor

• TP sensor

• IAT sensor

• MAP sensor

• CMP sensor

• CKP sensor

• Knock sensor

•VSS

• CPU (Central Processing Unit) of the ECM

The ECM and malfunction indicator lamp operate as fol-

lows:

• Malfunction indicator lamp lights when the ignition

switch is turned ON (but the engine stopped) with the

diagnosis switch terminal ungrounded regardless of

the condition of Engine and Emission control system.

This is only to check the malfunction indicator lamp

bulb and its circuit.

• If the above areas of the engine and emission control

system is free from any trouble after engine start (while

engine is running), the malfunction indicator lamp (1)

turns OFF.

• When the ECM detects a trouble which has occurred in

the above areas, it illuminates the malfunction indicator

while the engine is running to warn the driver of the

occurrence of trouble. At the same time it stores the

trouble area in the ECM back-up memory. (The mem-

ory is kept as it is even if the trouble was only tempo-

rary and disappeared immediately. It is not erased

unless the power to the ECM is shut off for specified

time below.)

• The ECM also indicates the trouble area in memory by

means of flashing of malfunction indicator lamp at the

time of inspection. (i.e. when diagnosis switch terminal

(1) is connected to ground terminal (2) with a service

wire and ignition switch is turned ON.)

NOTE:

• When a trouble occurs in the above areas and disap-

pears while the diagnosis switch terminal is

ungrounded and the engine is running, the malfunction

indicator lamp lights and remains ON as long as the

trouble exists, but it turns OFF when the normal condi-

tion is restored.

• Time required to erase diagnostic trouble code mem-

ory thoroughly varies depending on ambient tempera-

ture as follows.

DATA LINK CONNECTOR (DLC)

The DLC (1) complies with SAEJ1962 in the shape of the

connector and pin assignment.

• Pin 16 (2) is B+.

• Pin 7 (3) is a serial data line (K line of ISO 9141) used

for Tech 2 to communicate with the ECM, TCM, ABS

control module and airbag SDM.

• Pin 5 (4) is ECM ground.

• Pin 4 (5) is body ground.

• Pin 9 (6) is a serial data line used for Tech 2 to commu-

nicate with the immobiliser control module.

2.3 DIAGNOSTIC PRECAUTIONS

• When substituting a known-good ECM, the Immobiliser Control Module and the ECM must be

“Linked” - refer to Section 8G - 6. Registration of ICM and ECM for the correct procedure.

• Do not disconnect the ECM from power or ground before confirming the diagnostic information (DTC,

etc.) stored in the ECM memory. Disconnecting the ECM will erase the ECM memory.

• Diagnostic information stored in the ECM memory can be cleared and checked by using Tech 2. Refer to

Section 0C for the Tech 2 operating procedures .

•Refer to Section 0A - 1.6 PRECAUTIONS FOR ELECTRICAL CIRCUIT SERVICE before commencing

the inspection.

• ECM Replacement:

Check for following conditions. Neglecting this check may cause damage to the known-good ECM.

• Resistance value of all relays, actuators is as s pecified .

• MAP sensor and TP sensor are in good condition and the power circuits of these sensors are not

shorted to gro und .

AMBIENT

TEMPERATURE TIME TO CUT POWER TO ECM

Over 0°C 60 sec. or longer

Under 0°C Not specifiable. Select a place with

higher than 0°C temperature

2.4 ENGINE DIAGNOSTIC FLOW TABLE

NOTE: Refer to the following pages for the details of each step.

Step Action Yes No

1Customer Complaint Analysis.

1. Perform customer complaint analysis referring to

the following.

W as customer complaint analysis performed?

Go to S tep 2. Perform customer

complaint analysis.

2DTC Check, Record and Clearance.

1. Check for DTC referring to the following.

Is there any DTC(s)?

Print DTC or write them

down and clear them,

refer to DTC Clearance

in 2.4 ENGINE

DIAGNOSTIC FLOW

TABLE.

Go to Step 3.

Go to Step 4.

3Visual Inspection.

1. Perform visual inspection referring to the

following.

Is there any faulty condition?

Repair or replace mal-

function part.

Go to Step 11.

Go to Step 5.

4Visual Inspection.

1. Perform visual inspection referring to the

following.

Is there any faulty condition?

Go to Step 8.

5Trouble S ymptom Confirmation.

1. Confirm trouble symptom referring to the

following.

Is trouble symptom identified?

Go to Step 6. Go to Step 7.

6Rechecking and Record of DTC.

1. Recheck for DTC, refer to DTC Check in

2.4 ENGINE DIAGNOSTIC FLOW TABLE.

Is there any DTC(s)?

Go to Step 9. Go to Step 8.

7Rechecking and Record of DTC.

1. Recheck for DTC, refer to DTC Check in

2.4 ENGINE DIAGNOSTIC FLOW TABLE.

Is there any DTC(s)?

Go to Step 10.

8Engine Basic Inspection and Engine Diagnosis Table.

1. Check and repair according to Engine Basic

Inspection and Engine Diagnosis Table in

2.4 ENGINE DIAGNOSTIC FLOW TABLE.

Are check and repair complete?

Go to Step 11. Check and repair

malfunction part(s).

Go to Step 11.

9Trouble shooting for DTC.

1. Check and repair according to applicable DTC

diag. flow table.

Are check and repair complete?

10 Check for Intermittent Problems.

1. Check for intermittent problems by referring to the

following.

Is there any faulty condition?

Repair or replace mal-

function part(s).

Go to Step 11.

11 Final Confirmation Test.

1. Clear DTC if any.

2. Perform final confirmation test by referring to the fol-

lowing.

Is there any problem symptom, DTC or abnormal con-

dition?

Go to Step 6. End.

1. Customer Complaint Analysis

Recor d details of the problem (failure, compl aint) and how it oc curred as desc ribed by the custo mer. For this

purpose, use of an inspection form such as follows, will facilitate collecting information to the point required for

proper analysis and diagnosis.

2. DTC Check, Record and Clearance

First, check DTC, refer to DTC Che ck in 2.4 ENGINE DIAG NOSTIC FLOW TA BLE. If DTC is indicated, print

or write it down and then clear them by referring to DTC clearance section. DTC indicates malfunction that

occurred in the system but does not indicat e whether it exists now or it occurred in the past and the normal

condi tion has been resto red now. To ch eck which case appl ies, check the sy mptom in question according to

Step 4 and recheck DTC according to Step 5.

Attempt to diagnose a trouble based on DTC in this step only or failure to clear the DTC in this step will lead to

incorrect diagnosis, trouble diagnosis of a normal circuit or difficulty in troubleshooting.

3. and 4. Visual Inspection

As a preli minary step, per form a visua l check of the ite ms that suppor t proper function of the engine, re fer to

Visual Inspection in 2.4 ENGINE DIAGNOSTIC FLOW TABLE.

5. Trouble Symptom Confirmation

Based on information obtained in Step 1 Customer Complaint Analysis and Step 2 DTC Check, confirm

trouble symptoms. Also, reconfirm DTC according to DTC Confirmation Procedure described in each DTC

Diagnosis Section.

6. and 7. Rechecking and Record of DTC

Refer to DTC Check in 2.4 ENGINE DIAGNOSTIC FLOW TABLE for checking procedure.

8. Engine Basic Inspection and Engine Diagnosis Table

Perform basic engine check according to the Engine Basic Inspection Flow Table in

2.4 ENGINE DIAGNOSTIC FLOW TABLE first. When th e end of the flow table has been rea ched, ch eck the

parts of the system suspected as a possible cause, refer to Engine Diagnosis Table in

2.4 ENGINE DIAGNOSTIC FLOW TABLE and based on symptoms appearing on the vehicle (symptoms

obtained through steps of customer complaint analysis, trouble symptom confirmation and/or basic engine

check) and repair or replace faulty parts, if any.

9. Troubleshooting for DTC (See each DTC Diag. Table)

Based on the DTC indicate d in Step 5 and refe rring to the applica ble DTC Diag . Table in th is Section , locate

the cause of the trouble, namely in a sensor, switch, wire harness, connector, actuator, ECM or other part and

repair or replace faulty parts.

10. Check for Intermitt e nt Problem

Check parts where an intermittent trouble is easy to occur (e.g., wire harness, connector , etc.), refer to

1.7 ELECTRICAL CIRCUIT INSPECTION PROCEDURE - INTERMITTENT AND POOR CONNECTION in

Section 0A and related circuit of DTC recorded in Step 2.

11. Final Confirmati on Test

Confirm that the problem symptom has gone and the engine is free from any abnormal conditions. If what has

been repaired is related to the DTC, clear the DTC once, perform DTC confirmation procedure and confirm

that no DTC is indicated.

CUSTOMER PROBLEM INSPECTION FORM (EXAMPLE)

NOTE:

The abov e form is a st andard samp le. It should be mod ified acco rdin g to condi tions char acte risti c

of each market.

MALFUNCTION INDICATOR LAMP (MIL) CHECK

1. Turn ON ignition switch (with the engine at stop) and

check that the MIL lights.

•If the MIL does not light up (or the MIL dims), go to

Diagnostic Flow Table A-1 for troubleshooting.

•If the MIL flashes, go to Diagnostic Flow Table A-3.

2. Start the engine and check that the MIL turns OFF.

If the MIL remains ON and no DTC is stored in the

ECM, go to Diagnostic Flow Table A-2 for troubleshoot-

ing.

DIAGNOSTIC TROUBLE CODE (DTC) CHECK

[With Tech 2]

1. Prepare Tech 2 (A).

2. With the ignition switch OFF, connect it to data link

connector (DLC) (1) located on underside of the

instrument panel at driver’s side.

3. Turn the ignition switch ON and confirm that the MIL

lights.

4. Read the DTC according to the instructions displayed

on Tech 2 and print it or write it down.

Refer to Tech 2 operator’s manual for further details.

If communication between Tech 2 and the ECM is not

possible, check if Tech 2 is communicable by connect-

ing it to an ECM in another vehicle. If communication is

possible in this case, Tech 2 is in good condition.

Check the data link connector and serial data line

(circuit) in the vehicle with which communication was

not possible.

5. After completing the check, turn ignition switch OFF

and disconnect Tech 2 from data link connector.

[Without Tech 2]

1. Check malfunction indicator lamp, refer to Malfunction

Indicator Lamp Check in

2.4 ENGINE DIAGNOSTIC FLOW TABLE.

2. With the ignition switch OFF, disconnect Tech 2, if

connected and using a service wire (4), connect

diagnosis switch terminal (1) to ground terminal (2) in

diagnosis connector No. 1 (3).

3. With the ignition switch ON and leaving engine OFF,

read the DTC from the flashing pattern of malfunction

indicator lamp. Refer to Diagnostic Trouble Code Table

in 2.4 ENGINE DIAGNOSTIC FLOW TABLE. If the

lamp remains ON, go to Diagnostic Flow Table A-4.

NOTE:

• If an abnormality or malfunction lies in two or more

areas, the malfunction indicator lamp indicates applica-

ble codes three times each.

Flashing of these codes is repeated as long as the

diagnosis terminal is grounded and the ignition switch

is held at the ON position.

• Take a note of the diagnostic trouble code indicated

first.

4. After completing the check, turn the ignition switch

OFF and disconnect the service wire from the

diagno sis connecto r No.1.

DIAGNOSTIC TROUBLE CODE (DTC)

CLEARANCE

With Tech 2

1. Connect Tech 2 to the data link connec tor in the same

manner as when making this connection for a DTC

check.

2. Turn the ignition switch ON.

3. Erase the DTC according to the instructions displayed

on Tech 2. Refer to the Tech 2 operator’s manual for

further details.

4. After comple ting the clearanc e, turn the ignitio n switch

OFF and disconnect Tech 2 from the data link conne c-

tor.

NOTE: A DTC stored in the ECM memory is also cleared

when power to the ECM is cut off by disconnec tin g the bat-

tery cable, removing the fuse or disconnecting the ECM

connectors. Be careful not to clear it before recording DTC.

Without Tech 2

1. Turn the ignition switch OFF.

2. Disconne ct the batter y negative cable for the specifie d

time below to erase any diagnostic trouble code(s)

stored in the ECM memory. Reconnect the battery.

Time require d to erase DTC:

AMBIENT

TEMPERATURE TIME TO CUT POWER TO ECM

Over 0°C 60 sec. or longer

Under 0°C Not specifiable. Select a place with

higher than 0°C temperature

DIAGNOSTIC TROUBLE CODE (DTC) TABLE

NOTE:

• () marked in DTC No. column is DTC which is displayed by flashing malfunction Indicator Lamp (MIL).

• DTC No.12 appears when none of the other codes is identified.

DTC

NO. DETECTING ITEM DETECTING CONDIT ION

(DTC will set whe n detecting:) MIL

P0105

(No.11) Manifold absolute pressure

circuit malfunction Low pressure-high vacuum-low voltage

(or MAP sensor circuit shorted to ground)

High pressure-low vacuum-high voltage (or MAP

sensor circuit open).

1 drivin g

cycle

P0106

(No.11) Manifold absolute pressure

range / perform anc e probl em Variation of input voltage (manifold pressure) is

lower than specification at cold starting. 1 drivin g

cycle

P0110

(No.18) Intake air temp. circuit mal-

function Intake air temp. circuit low input.

Intake air temp. circuit high input. 1 drivin g

cycle

P0115

(No.19) Engine coolant temp. circuit

malfunction Engine coolant temp. circuit low input.

Engine coolant temp. circuit high input. 1 drivin g

cycle

P0120

(No.13) Throttle position circuit mal-

function Throttle position circuit low input.

Throttle position circuit high input. 1 drivin g

cycle

P0130

(No.14) HO2S circuit malfunction Min. output voltage of HO2S-higher than specifica-

tion.

Max. output voltage of HO2S-lower than specifica-

tion.

2 drivin g

cycle

P0135

(No.14) HO2S heater circuit malfunc-

tion Terminal voltage is lower than specification at

heater OFF or it is higher at heater ON. 2 drivin g

cycles

P0325

(No.17) Knock sensor circuit malfunc-

tion Knock sensor circuit low input.

Knock sensor circuit high input. 1 drivin g

cycle

P0335

(No.23) Crankshaft position sens or

circuit malfunction No signal for 2 sec. during engine cranking. 1 driving

cycle

P0340

(No.15) Camshaft position sensor cir-

cuit malfunction No signal during engine running. Mismatch input

signal compared to crankshaft position signal. 1 drivin g

cycle

P0500

(No.16) Vehicle speed sensor mal-

function No signal while running in D range or during fuel cut

at decelerating. 1 drivin g

cycle

P0601

(No.71) Internal control module mem-

ory check sum error Data write error (or check sum error) when written

into ECM. 1 drivin g

cycle

P1450

(No.29) Barometric pressure sensor

circuit malfunction Barometric pressure is lower or higher than specifi-

cation (or sensor malfunction). 1 drivin g

cycle

DTC

NO. DETECTING ITE M DETECTING CONDIT ION

(DTC will set when detecting:) MIL

P1620

(No.84) ECM code not registered Refer to Section 8G, IMMOBILISER CONTROL

SYSTEM

P1621

(No.83) No ECM code transmitted from Immobiliser

Control Module

P1622

(No.82) Fault in ECM

P1623

(No.81) ECM code not matched

FAIL-SAFE TABLE

When a ny of the followin g DTCs are de tected, th e ECM ente rs fail- safe mode for as l ong as the m alfunctio n

continues to exist. That mode is canceled when the ECM detects normal condition.

DTC NO. TROUBLE AREA FAIL-SAFE OPERATION SYMPTOM

P0105 &

P0106

(No.11)

MAP SENSOR ECM uses value determined by

throttle opening and engine speed.

ECM stops EGR, EVAP purge and

idle air control.

Hard starting/ rough or incorrect

idle/ excessive fuel consumption/

hesitation/ poor acceleration/

surge/ detonation or spark knock.

P0110

(No.18) IAT SENSOR ECM controls ac tuato rs a ssum ing

that intake air temperature is 20°C. Hard starting/ rough or incorrect

idle/ excessive fuel consumption/

hesitation poor acceleration/ deto-

nation or spark knock.

P0115

(No.19) ECT SENSOR ECM controls actuators assuming

that engine coolant temperature is

80°C.

Radiator fan motor ON.

Hard starting/ rough or incorrect

idle/ excessive fuel consumption/

hesitation poor acceleration/ deto-

nation or spark knock.

P0120

(No.13) T P SENSO R ECM control s ac tuato rs ass um ing

that throttle opening is 20°. Rough o r in co rr ec t i dl e/ e xce ss iv e

fuel consumption/ hesitation/ poor

acceleration.

P0130

(No.14) HEATED OXYGEN

SENOR – Hard starting/ rough or incorrect

idle/ excessive fuel consumption/

hesitation/ poor acceleration.

P0325

(No.17) KNOCK SENSOR – Detonation/ spark knock.

P0335

(No.23) CKP SENSOR

• Fix ignition timing.

• ECM changes injecti on control

system from sequential injection

to simultaneous one.

Hard starting/ engine stall.

P0340

(No.15) CMP SENSOR ECM changes injection control sys-

tem from sequential injection to

simultaneous one.

Hard starting.

P0500

(No.16) V EH IC L E SP EE D

SENSOR ECM stops idle air control. Rough or incorrect idle.

P0601

(No.71) ECM INTERNAL – Hard starting/ rough or incorrect

idle/ excessive fuel consumption/

detonation or spark knock/ hesita-

tion poor acceleration.

P1450

(No.29) BAROMETRIC

PRESSURE SEN-

SOR

ECM controls actuators assuming

that barometric pressure is

100 kPa (760 mmHg).

Hard starting/ rough or incorrect

idle.

VISUAL INSPECTION

Visually check following parts and systems.

INSPECTION ITEM REFERRING SECTION

• Engine oil – level, leakage. Section 0B

• Engine coolant – level, leakage. Section 0B

• Fuel – level, leakage. Section 0B

• A/T fluid – level, lea ka ge. Section 0B

• Air cleaner element – dirt, clogging. Section 0B

• Battery – fluid level, corrosion of terminal.

• Water pump belt – tension, damage. Section 0B

• Throttle cable – play, installation. Section 6E1

• Vacuum hoses of air intake system – disconnection, loose-

ness, deterioration, bend.

• Connectors of electric wire harness – disconnection, friction.

• Fuses – burning. Section 8

• Parts – installation, bolt – looseness.

• Parts – deformation.

• Other parts that can be checked visually.

• Check following items at engine start, if possible:

•Malfunction indicator lamp – Operation. Section 6

•Charge warning lamp – Operation. Section 6H

•Engine oil pressure warning lamp – Operation. Section 8 (Section 6 for pressure check)

•Engine coolant temp. meter – Operation. Section 8

•Fuel level meter – Operation. Section 8

•Tachometer, if equipped – Operation.

•Abnormal air being inhaled from air intake system.

•Exhaust system – leakage of exhaust gas, noise.

ENGINE BASIC INSPECTION

This check is very important for troubleshooting when ECM has detected no DTC and no abnormality has

been found in visual inspection.

Follow the flow table carefully.

Step Action Yes No

Was ENGINE DIAG. FLOW TABLE per-

formed? Go to Step 2. Go to 2.4 ENGINE

DIAG. FLOW TABLE.

Check battery voltage.

Is it 11 V or more? Go to Step 3. Charge or replace bat-

tery.

Is engi ne cranked? Go to Step 4. Go to 2. DIA GNOSIS in

Section 6G.

Does engi ne start? Go to Step 5. Go to Step 7.

Check idle speed as follows:

1) War m up engine to normal oper ating

temp.

2) Shift transmission to neutral position for

M/T (P position for A/T).

3) All of electrical loads are switched off.

4) Check engine idle speed with Tech 2.

See Fig. 1.

Is it 6 50 – 750 r/min (70 0 – 800 r/min. fo r A/T

vehicle)?

Go to Step 6. Go to 2.4 ENGINE

DIAGNOSIS TABLE.

Check ignition timing as follows:

1) Connect test switch terminal of diagnosis

connector No. 1 to ground. See Fig. 2.

2) Using timing li ght (1), check initial igni-

tion timing. See Fig. 4.

Is it 5° ± 3° BTDC at specified idle speed?

Go to 2.4 ENGINE

DIAGNOSIS TABLE. Check ignition control

relate d parts refer, to

Section 6F1.

Is immo biliser control system equipped? Go to Step 8. Go to Step 9.

Check immobiliser system malfunct ion as

follows:

1) Check MIL (malfunction indicator lamp)

for flashing.

Is it fl ashing whe n igniti on switch is turned t o

ON position?

Go to 2. DIAGNOSIS in

Section 8G. Go to Step 9.

Check fuel supply as follow s:

1) Check to make sure that enough fuel is

filled in fuel tank.

2) Turn ON ignition switch for 2 seconds

and then OFF. See Fig. 5.

Is fuel pressure felt from fuel feed hose (1)

when ignition switch is turned ON?

Go to Step 11. Go to Step 10.

Check fuel pump for operating.

Was fuel pump operating sound heard from

fuel filler for about 2 seconds after ignition

switch ON and stop?

Go to 2.26 DIAG. FLOW

TABLE B-3. Go to 2.25 DIAG. FLOW

TABLE B-2.

Fig. 1 for Step 5

Fig. 2 for Step 6 when not using Tech 2

Check ignition spark as follows:

1) Discon nect injector connectors.

2) Remove spark pl ugs and connect them

to high tension cords.

3) Ground spark plugs.

4) Crank engine and check if each spark

plug sparks.

Is it in good condition?

Go to Step 12. Go to 2. DIAGNOSIS in

Section 6F1.

Check fuel injector for operation as follows:

1) Install s park plugs an d connect injector

connectors.

2) Using sound scope (1), check operating

sound of each in jector ( 2) when cra nking

engi ne. See Fig. 6.

Was injector operating sound heard from all

injectors?

Go to 2.4 ENGINE

DIAGNOSIS TABLE. Go to 2.24 DIAG. FLOW

TABLE B-1.

Step Action Yes No

Fig. 4 for Step 6

Fig. 5 for Step 9

Fig. 6 for Step 12

ENGINE DIAGNOSIS TAB LE

Perfo rm troubl eshooting refer ring to followin g table when ECM ha s detec ted no DTC an d no abnormal ity has

been found in visual inspection and engine basic inspection previously.

Condition Possible Cause Correction

Hard Starting

(Engine cranks OK) Faulty spark plug. Spark plugs in Section 6F1.

Leak y high-t ension cord. High-tension cords in Section 6F1.

Loos e connection or disconn ection of

high-t ensio n co rd s or lea d w ire s. High-tension cords in Sect ion 6F1.

Faulty ignition coil. Ignition coil in Section 6F1.

Dirty or clogged fuel hose or pipe. 2.26 Diagnostic Flow Table B-3.

Malfunctioning fuel pump. 2.25 Diagnosti c Flow Table B-2.

Air inhaling from intake manifold gasket

or throttl e bo d y ga s ket.

Faulty idle air control system. 2.27 Diagnostic Flow Table B-4.

Faulty ECT sensor or MAP sensor. ECT sensor or MAP sensor in Sec-

tion 6E1.

Faulty ECM.

Hard Starting

(Engine cranks OK) Poor spark plug tightening or faulty gas-

ket. Spark plugs in Section 6F1.

Compression leak from valve seat. Valves inspection in Section 6A1.

Sticky valve stem. Valves inspection in Section 6A1.

Weak or damaged valve sprin gs. Valve springs inspection in Section

6A1.

Compression leak at cylinder he ad gas-

ket. Cylinder head inspe c tion in Section

6A1.

Sticking or damaged piston ring. Cylinders, pistons and piston rings

inspe c ti on in Se ction 6A1.

Worn piston, ring or cylinder. Cylinders, pistons and piston rings

inspe c ti on in Se ction 6A1.

Malfunctioning PCV valve. PCV system in Section 6E1.

Low compression. Compression check in Section 6A1.

Low oil pressu re Inco rre c t oil vis cos i ty. E n g in e oi l an d oi l fil te r ch an ge in

Section 0B.

Malfunctioning oi l pressure switch. Oil pressure switc h inspection in

Section 8.

Clogged oil str ainer. Oil pan and oil pump strainer clean-

ing in Section 6A1.

Functional deterioration of oil pump. Oil pump in Section 6A1.

Worn oil pump relief valve. Oil pump in Section 6A1.

Excessive clearance in various sliding

parts.

Engine noise

Note: Before

checking mechani-

cal noise, make

sure that :

Specified spark

plug in used.

Specified fuel is

used.

Incorrect valve lash . Valve lash in Section 6A1.

Worn val ve stem and guide. Valves inspection in Sect ion 6A1.

Weak or broken valve spring. Valve springs inspect ion in Section

6A1.

War ped or bent valve. Valves inspection in Section 6A1.

Worn pis ton, ring and cylinder bore. Pistons and cyl inders inspection in

Section 6A1.

Worn ro d bearing. Crank pin and connecting rod bear-

ing inspection in Section 6A1.

Worn crank pin. Crank pin and connecting rod bear-

ing inspection in Section 6A1.

Loos e connecting rod nuts. Connecting rod insta llation in Sec-

tion 6A1.

Low oil pressure. Previously outlined.

Wo rn bearing . Crank shaft an d bearin g inspect ion in

Section 6A1.

Wo rn crankshaf t journa l. Cranksha ft and be aring i nspection i n

Section 6A1.

Loose bearing cap bolts. Crankshaft inspection in Section

6A1.

Excessive crankshaft thrust play. Crankshaft thrust play i nspection in

Section 6A1.

Overheating Inoperative t hermostat. Ther mostat in Section 6B.

Poor water pump performance. Water pump in Section 6B.

Clogged or leaky radiator. Radiator in Section 6B .

Incorrect engine oil grade. Engine oil and oil filter cha nge in

Section 0B.

Clogged oil filter or oil str ainer. Oil pressure ch eck in Sect ion 6A1.

Poor oil pump performance. Oil pressure check in Section 6A1.

Faulty radiator fan control system. 2.30 Diagnostic flow table B-7

Dragging brakes. Trouble diagnosis in Section 5.

Slipping cl utch. Tr ouble diagnosis in Section 7C.

Blown cylinder head gasket. Cylinder head in Section 6A1.

Condition Possible Cause Correction

Poor gasoline mile-

age Leaks or loose connection of high-tension

cord. High-tension cords in Section 6F1.

Faulty sp ark plug (incorrect gap, heavy

deposits and burned electrodes, etc.). Spark plugs in Section 6F1.

Malfunctioning EGR valve. EGR system in Section 6E1.

High idle speed. Refer to incorrect engine idle speed

previously outlined.

Poor perfo rmance of TP sensor, ECT

sensor or MAP sensor. TP sensor, ECT sensor or MAP sen-

sor i n Section 6E1.

Faulty EGR valve. EGR system in Section 6E1.

Faulty fuel injector(s). Diagnostic Flow Table B-1.

Faulty ECM.

Poor valve seating. Valves inspection in Section 6A1.

Dragging brakes. Trouble diagnosis in Section 5.

Slipping cl utch. Tr ouble diagnosis in Section 7C.

Faulty thermostat. Thermostat in Section 6B.

Incorrect tyre pressure. Refer to Section 3F.

Low Compression. Previously outlined.

Excessive engine

oil co ns um p tion Blown cylinder head gasket. Cylinder head in Section 6A1 .

Leaky camshaft oil seals. Camshaft in Section 6A 1.

Sticky piston ring. Piston cleaning in Sect ion 6A1.

Worn piston and cylinder. Pistons and cylinders inspection in

Section 6A1.

Worn piston ring groo ve and ring. Pistons inspection in Section 6A1.

Improper location of piston ring gap. Pistons assembly in Se ction 6A1.

Worn or damaged valve stem seal. Valves removal and installation in

Section 6A1.

Worn valv e stem. Valves inspection in Section 6A1.

Engine hesitates

(Momentary lack of

response as accel-

erator is depressed .

Can occur at all

vehicle speed s.

Usually most severe

when first trying to

make vehicle move,

as from a sto p

sign.)

Spark plug faulty or plug gap out of

adjustment. Spark plugs in Se ction 6F1.

Leak y high-t ension cord. High-tension cords in Section 6F1.

Fuel pressure out of specification. 2.26 Diagnostic Fl ow Table B-3.

Malfunctioning EGR valve. EGR system in Section 6E1.

Poor perfo rmance of TP sensor, ECT

sensor or MAP sensor. TP sensor, ECT sensor or MAP sen-

sor i n Section 6E1.

Faulty fuel injector. 2.24 Diagnosti c Flow Table B-1.

Faulty ECM.

Engine overheating. Refer to 2. Diagnosis in Section 6B.

Low compression. P reviously outlined.

Surge

(Engine power var i-

ation under stea dy

throttle or cruise.

Feels like vehicle

speeds up and

down with no

change in acce lera-

tor pedal.)

Leak y or loosely connected high-t ension

cord. High-tension cords in Section 6F1.

Faulty sp ark plug (excess carbon dep os-

it s, im proper gap, and bur ned el ectrod es,

etc.).

Spark plugs in Section 6F1.

Variable fuel pressure. 2.26 Diagnostic Flow Table B-3.

Kinked or damaged fuel hose and lines.

Faulty fue l pu m p (clo gg e d fu el filte r).

Malfunctioning EGR valve. EGR system in Section 6E1.

Poor performance of MAP sensor. MAP sensor in Section 6E1.

Faulty fuel injector. 2.24 Diagnosti c Flow Table B-1.

Faulty ECM.

Condition Possible Cause Correction

Excessive detona-

tion

(Engine makes con-

tinuously sharp

metallic knocks that

change with throt-

tle opening. Sounds

lik e pop corn pop-

ping.)

Faulty spark plug. Spark plugs in Section 6F1.

Loos e connection of high-t ension cord. High-tension cords in Section 6F1.

Engine overheating. Refer to 2. Diagnosis in Section 6B.

Clogged fuel filter (faulty fu el pump) or

fuel lines. Diagnostic Flow Table 2.24 B-1 or

2.25 B-2.

Air inhaling fr om intake manifold or throt-

tle body gasket.

Malfunctioning EGR valve. EGR system in Section 6E1.

Poor performance of knock sensor, ECT

sensor or MAP sensor. Knock sensor in Section 6, ECT sen-

sor or MAP sensor in Section 6E1.

Faulty fuel injector(s). 2.24 Diagnostic Flow Table B-1.

Faulty ECM.

Excessive combustion chamber deposits. Piston and cylinder head cleaning in

Section 6A1.

Engine has no

power Faulty spark plug. Spark plugs in Section 6F1.

Faulty ignition coil with ignitor. Ignition coil in Section 6F1.

Leaks, loose co nnection or di sconnectio n

of high-tension cord. High-tensio n cords in Section 6F 1.

Faulty knock sensor. 2.19 Knock sensor malfunction in

this Section.

Clogged fuel hose or pipe. Diagnostic Flow Table B-3.

Malfunctioning f uel pump. Diagnostic Flow Table B-2.

Air inhaling from intake manifold gasket

or throttl e bo d y ga s ket.

Engine overheating. Refer to 2. Diagnosis in Section 6B.

Engine has no

power Malfunctioning EGR valve. EGR system inspection in Section

6E1.

Incorrect accelerator cable play. Accelerator cable play in Section

6E1.

Poor perfo rmance of TP sensor, ECT

sensor or MAP sensor. TP sensor, ECT sensor or MAP sen-

sor i n Section 6E1.

Faulty fuel injector(s). 2.24 Diagnostic Flow Table B-1.

Faulty ECM.

Dragging brakes. Trouble diagnosis in Section 5.

Slipping cl utch. Tr ouble diagnosis in Section 7C.

Low compression. P reviously outlined.

Condition Possible Cause Correction

Impr op er en gi ne

idling or engine fails

to idle

Faulty spark plug. Spark plugs in Section 6F1.

Leak y or disconnected high-tension cord . Hig h-tension cords in Sect ion 6F1.

Faulty ignition coil with ignitor. Ignition coil in Section 6F1.

Fuel pressure out of specification. 2.26 Diagnostic Fl ow Table B-3.

Leak y manifold, throttle body, or cylinder

head gasket.

Malfunctioning EGR valve. EGR system in Section 6E1.

Faulty idle air control system. 2.27 Diagnostic Flow Table B-4.

Faulty evaporative emission control sys-

tem. EVAP contro l system in Section 6E1.

Faulty EGR system. EGR system in Section 6E1.

Faulty fuel injector(s). 2.24 Diagnostic Flow Table B-1.

Poor performance of ECT sensor, TP

sensor or MAP sensor. ECT sensor, TP sensor or MAP sen-

sor i n Section 6E1.

Faulty ECM.

Loos e connection or disconn ection of

vacuum hoses.

Malfunctioning PCV valve. PCV system in Section 6E1.

Engine overheating. Refer to 2. Diagnosis in Section 6B.

Low compression. P reviously outlined.

Faulty electric load signa l circuit. 2.29 Diagnostic Flow Table B-6

Faulty A/C signal circuit. 2.28 Diagnostic Flow Table B-5

Excessive hydro-

carbon (HC) emis-

sion or carbon

monoxide (CO)

Faulty spark plug. Spark plugs in Section 6F1.

Leak y or disconnected high-tension cord . Hig h-tension cords in Sect ion 6F1.

Faulty ignition coil with ignitor. Ignition coil assembly in Section

6F1.

Low compression. Refer to previously outlined.

Lead c onta minatio n of three way cat alyt ic

converter. Check for ab s en c e of fill er ne c k

restrictor.

Faulty evaporative emission control sys-

tem. EVAP contro l system in Section 6E1.

Fuel pressure out of specification. 2.26 Diagnostic Fl ow Table B-3.

Closed loop system (A/F feed back com-

pensation) fails:

• Fault y TP sens or.

• Poor performance of ECT sensor or

MAP sensor.

TP sensor in Section 6E1.

ECT sens or or MAP sensor in Sec-

tion 6E1.

Faulty inje ctor(s). 2.24 Diagnostic Flow Table B-1

Faulty ECM.

Engine not at normal operating tempera-

ture.

Clogged air cleaner.

Vacuum leaks.

Condition Possible Cause Correction

2.5 TECH 2 DATA

As th e data valu es given below are standard val ues est imated on th e basis of value s obtained from the no r-

mally operating v ehicles b y using a Te ch 2, use t hem as r eference v alues. Even when the v ehicle is in good

condition, there may be cases where the checked value does not fall within each specified data range. There-

fore, judgment as abnormal should not be made by checking with this data alone.

Also, conditions in the below table that can be checked by the Tech 2 are those detected by the ECM and out-

put from the ECM as commands. There may be cases where the engine or actuator is not operating (in the

condition) as indicated by the Tech 2. Use a timing light to check the ignition timing.

NOTE:

When checking the data with the engine running at idle or racing, shift M/T gear to the neutral

gear position or A/T gear to the Park position and pull the parking brake ON fully. Also, if nothing or no

load is indicated, turn OFF A/C, all electric loads, P/S and all the other necessary switches.

Excessive nitrogen

oxides (NOx) emis -

sion

Improper ignition timing. See Section 6F1.

Lead contamination of catalytic converter. Check for absence of filler neck

restrictor.

Faulty EGR system. EGR system in Section 6E1.

Fuel pressure out of specification. Diagnostic Flow Table B-3.

Closed loop system (A/F feed back com-

pensation) fails:

• Fault y TP sens or.

• Poor performance of ECT sensor or

MAP sensor.

TP sensor in Section 6E1.

ECT sens or or MAP sensor in Sec-

tion 6E1.

Faulty inje ctor(s). 2.24 Diagnostic Flow Table B-1

Faulty ECM.

Condition Possible Cause Correction

Tech 2 Data Vehicle Condition Normal Condition /

Reference Values

ENGINE LOAD At specified idle speed with no load after

warming up. 3 – 9%

At 2500 r/min. with no load after warming up. 12 – 17%

COOLANT TEMPERATURE At specified idle speed after warming up. 80 – 100°C

SHORT TERM FUEL TRIM At specified idle speed after warming up. – 20 – +20%

LONG TERM FUEL TRIM At specified idle speed after warming up. – 15 – +15%

MANIFOLD ABSOLUTE

PRESSURE At specified idle speed with no load after

warming up. 30 – 37 kPa,

220 – 280 mmHg

ENGINE SPEED At idling with no load after warming up. Desired idle speed

±50 r/min

VEHICLE SPEED At stop. 0 km/h

IGNIT I ON SPARK ADVANC E

(IGNITION TIMING ADV ANCE

FOR NO.1 CYLINDER)

At specified idle speed with no load after

warming up. 6 – 16° BTDC

INTAKE AIR TEMPERATURE At specified idle speed after warming up. Ambient temp. :

+15°C (59°F)

–5°C (23°F)

MASS AIR FLOW At specified idle speed with no load after

warming up. 1 – 4 gm/sec

At 2500 r/min. with no load after warming up. 4 – 9 gm/sec

THROTTLE POSITION Ignition switch

ON/engine

stopped

Throttle valve fully closed 7 – 18%

Throttle valve fully open 70 – 90%

O2 SENSOR 1 At specified idle speed after warming up 0.01 – 0.95 V

DESIRED IDLE SPEED At idling with no load after warming up, M/T

at neutral, A/T at P range M/T 700 r/min

A/T 750 r/min

THROTTLE POSITION SEN-

SOR SIGNAL Ignition switch

ON/engine

stopped

Throttle valve fully closed More than 0.2 V

Throttle valve fully open Less than 4.8 V

INJECTION PULSE WIDTH At specified idle speed with no load after

warming up 2.0 – 3.6 msec.

At 2500 r/min with no load after warming up 2.0 – 3.6 msec.

BAROMETRIC PRESSURE – Display barometric pressure

IDLE AIR CONTROL At idling with no load after warming up 5 – 25%

LONG TERM FUEL TRIM

IDLE At specified idle speed after warming up – 35 – +35%

BATTERY VOLTAGE Ignition switch ON/engine stop 12 – 14 V

CANISTER PURGE PWM – 0 – 100%

EGR PULSE RATIO At specified idle speed after warming up 0%

ECM FUEL CUTOFF When engine is at fuel cut condition ACTIVE

Other than fuel cut condition INACTIVE

FUEL PUMP Within 2 seconds after ignition switch ON or

engine ru nning ACTIVE

Engine stop at ignition switch ON. INACTIVE

RADIATOR COOLING FAN 1 Ignition switch

ON Engine coolant temp. :

Lower than 95°C (203°F) INACTIVE

Engine coolant temp. :

97.5°C (208°F) or higher ACTIVE

APP AT IDLE POSITION

(ACCELERATOR PEDAL

POSITION)

Throttle valve at idle position ACTIVE

Throttle valve opens larger than idle position INACTIVE

PARK/NEUTRAL POSITION

A/T only Ig nition switch

ON Selector lever in P or N

position P - N

Selector lever in R, D, 2 or

L position R - D - 2 - L

STARTER SIGNAL Starter motor cranking ACTIVE

Starter motor not engage INACTIVE

A/C INFORMATION SWITCH Engine running after warming up, A/C not

operating INACTIVE

Engine running after warming up, A/C oper-

ating ACTIVE

EST ADJUSTMENT SWITCH Refer to Section 6F1 ACTIVE / INACTIVE

A/C CLUTCH Ignition switch

ON A/C switch ON ACTIVE

A/C switch OFF INACTIVE

HEATER FAN Ignition switch

ON Heater fan switch ON

(other than 1st speed) ACTIVE

Heater fan switch OFF

(or 1st speed) INACTIVE

BRAKE SWITCH Ignition switch

ON Brake pedal is depressed ACTIVE

Brake pedal is released INACTIVE

SENSOR At specified idle speed after warming up. ACTIVE (closed loop)

INACTIVE (open loop)

ELECTRIC LOAD Ignition switch ON / Headlight, position light

turned OF F INACTIVE

Ignition switch ON / Headlight turned,

positi on light ON ACTIVE

Tech 2 Data Vehicle Condition Normal Condition /

Reference Values

TECH 2 DATA DEFINITIONS:

Engine Load, %

Engine load displa yed as a percentage of maximum possible load. Value is calculated mathematically using

the formula: actual (current) intake air volume ÷ maximum possible intake air volume x 100%.

Coolant Temperature, °C

It is detected by engine coolant temperature sensor

Short Term Fuel Trim,%

Short term fuel trim value represents short term corrections to the air/fuel mixture computation. A value of 0

indicates no correction, a value greater than 0 means a rich mixture correction, and a value less than 0

implies a lean mixture correction.

Long Term Fuel Trim,%

Long term fuel trim value represents long term corrections to the air/fuel mixture computation. A value of 0

indicates no correction, a value greater than 0 indicates a rich mixture correction, and a value less than 0 indi-

cates a lean mixture correction.

Manifold Absolute Pressure, kPa

Detected by the manifold absolute pressure sensor and used (among other things) to compute engine load.

Engine Speed, RPM

It is computed by reference pulses from crankshaft position sensor.

Vehicle Speed, km/h

It is computed based on pulse signals from vehicle speed sensor.

Ignition Spark Advance (Ignition Timing Advance For No.1 Cylinder), °CA

Ignition timing of No.1 cylinder is commanded b y the ECM. The actual ignition timing should be checked by

usin g a timing light.

Intake Air Temperature,°C

It is detected by the intake air temperature sensor and used to determine the amount of air passing into the

intake manifold as air density varies with temperature.

Mass Air Flow, g/s

It represents total mass of air entering intake manifold which is computed based on signals from MAP sensor,

IAT sensor, TP sensor, etc.

Throttle Position, %

When th rottle positio n sensor is a t the fully closed position, thro ttle opening is indicated as 0% and 100% at

the full open position.

O2 Sensor 1, mV

It indicates output voltage of HO2S installed on exhaust manifold (pre-catalyst).

Desired Idle Speed, RPM

The Desired Idle S peed is an ECM internal parameter which indicates the ECM requested idle. If the engine is

not running, this number is not valid.

Throttle Positi on Sensor Signal, V

The Throttle Position Sensor reading provides throttle valve opening information in the form of voltage.

Injection Pulse Wi dth, ms

This parameter indicates the time of the No.1 cylinder injector drive pulse (valve opening) which is output from

the ECM.

Barometric Pressure , kPa

Displays barometric pressure.

Idle Air Control, %

This parameter ind ic ate s cu rre nt flo w t ime ra te with in a cer tain se t cycle of the IAC valv e (va lv e ope ning r ate)

which controls the amount of bypass air (idle speed).

Long Term Fuel Trim Idle, %

The va lue of Long Te rm Fuel Trim is obtained by put ting value s of short Term F uel Trim and Long Term Fuel

Trim together. This value indicates how much correction is necessary to keep the air/fuel mixture stoichiomet-

rical.

Battery Volt age, V

This parameter indicates battery positive voltage inputted from main relay to ECM.

Canister Purge PWM, %

This parameter ind ic ate s valv e O N (val v e open ) time rate with in a c er tain set cycl e of cani st er purge s ole noi d

valve which controls the amount of EVAP purge.

0% means that the purge valve is completely closed while 100% is a fully open valve.

EGR Pulse Ratio, %

This parameter indicates opening rate of EGR valve which controls the amount of EGR flow.

Fuel Cutoff, Acti ve/Inactive

ACTIVE: Fuel being cut (output signal to injector is stopped)

INACTIVE: Fuel not being cut

Fuel Pump, Active/I nactive

ACTIVE: Fuel pump running.

INACTIVE: Fuel pump stopped.

Radiator Cooling Fan 1, Active/Inactive

ACTIVE: Command for radiator fan control relay operation being output.

INACTIVE: Command for relay operation not being output.

APP at Idle Position (Accelerator Pedal Posit ion), Active/Inactive

This parameter will re ad AC TI VE when thr o ttle val ve is fully clos ed, or INA CTIVE when the thr ottl e is not ful ly

closed.

Park/Neutral Position (A/T Only), P-N range or R-D-2-L range

It is detected by a signal from TCM.

R-D-2-L range: A/T is in R, D, 2 or L range.

P-N range: A/T is in P or N range or the above signal is not inputted from TCM.

Starter Signal, Active/Inactive

ACTIV E: Starter motor cranki ng.

INACTIVE: Starter motor not engaged.

A/C In fo r m a t io n S w itch , Ac tive/ In a c tive

ACTIVE: Command for A/C operation being output from ECM to A/C amplifier.

INACTIVE: Command for A/C operation not being output.

EST Adjustment Switch, Active/ Inactive

Refer to Section 6F1.

A/C Clutch (Air Conditioning), Active/Inactive

ACTIVE: A/C switch ON.

INACTIVE: A/C switch OFF.

Heater Fan, Active/Inactive

ACTIVE: Heater fan ON (other than 1st speed)

INACTIVE: Heater fan OFF or on 1st speed.

Brake Switch, Active/Inactive

ACTIVE: Brake pedal depressed.

INACTIVE: Brake pedal released.

O2 Sensor, Active/Inactive

Air/fuel ratio feedback loop status displayed as either open (inactive) or closed (active) loop.

INACTIVE (open loop) indicates that the ECM ignores feedback from the exhaust oxygen sensor.

ACTIVE (closed loop) indicates final injection duration is corrected for oxygen sensor feedback.

Electric Load, Active/Inactive

ACTIVE: Headlight, position light ON signal inputted.

INACTIVE: Above electric loads all turned OFF.

2.6 INSPECTION OF ECM AND ITS CIRCUITS

The ECM and its circuits can be checked at the ECM wiring

connectors by measuring voltage and resistance.

CAUTION: The

ECM cannot be checked by itself. It is

strictly prohibited to connect a voltmeter or ohm

mete r to the ECM with connector discon nected.

VOLTAGE CHECK

1. Remove the ECM (1) from the vehicle, refer to

1.3 ELECTRONIC CONTROL SYSTEM in

Section 6E1 .

2. Check the vo ltage at each co nnect or term inal ( 2) whil e

connected.

NOTE:

As each terminal voltage is affected by the bat-

tery voltage, confirm that it is 11 V or more when the

ignition switch is ON.

Legend

1. ECM

2. ECM connectors viewed from harness side

TERMINAL

NO. CIRCUIT NORMAL

VOLTAGE CONDITION

C42 1 Ground – –

2 Ground – –

3 Ground – –

4 EVAP canister purge valve 10 – 14 V Ignition switch ON

5Blank – –

6 Idle air control valve 0 – 13 V At specified idle speed after engine

warmed up

7 Heater of HO2S 10 – 14 V Ignition switch ON

8 Fuel injector No.4 10 – 14 V Ignition switch ON

9 Fuel injector No.1 10 – 14 V Ignition switch ON

10 Sensor ground – –

11 Camshaft position sensor 0 – 0.8 V and

4 – 6 V Ignition switch ON

12 Shield ground – –

13 Heated oxygen sensor Refer to DTC P0130 diag. flow table

14 Engine coolant temp. sensor 0.55 – 0.95 V Ignition switch ON

Engine coolant temp.: 80°C

15 Intake air temp. sensor 2.0 – 2.7 V Ignition switch ON

Intake air temp.: 20°C

16 Throttle position sensor 0.2 – 1.0 V Ignition switch ON

Throttle valve at idle position

2.8 – 4.8 V Ignition switch ON

Throttle valve at full open position

17 EGR valve (Stepper motor coil 3) 10 – 14 V Ignition switch ON

18 EGR valve (Stepper motor coil 1) 10 – 14 V Ignition switch ON

19 Ignition coil #2 – –

20 Ignition coil #1 – –

21 Fuel injector No.2 10 – 14 V Ignition switch ON

22 Power source for sensor 4.75 – 5.25 V Ignition switch ON

23 Crankshaft position sensor – –

24 – – –

25 Shield ground – –

26 Manifold absolute pressure sensor 3.3 – 4.0 V Ignition switch ON

Barometric pressure: 100 kPa (760

mmHg)

27 Diag. Switch terminal 4 – 6 V Ignition switch ON

28 EGR valve (Stepper motor coil 4) 10 – 14 V Ignition switch ON

29 EGR valve (Stepper motor coil 2) 10 – 14 V Ignition switch ON

30 Blank – –

31 Fuel injector No.3 10 – 14 V Ignition switch ON

TERMINAL

NO. CIRCUIT NORMAL

VOLTAGE CONDITION

C41 1 A/C compressor clutch and condenser

fan relay 0 V Ignition switch ON

2 Blank – –

3 Blank – –

4 Blank – –

5 Power source 10 – 14 V Ignition switch ON

6 Power source 10 – 14 V Ignition switch ON

7 Power source for back-up 10 – 14 V Anytime

8 Diagnostic connector No. 1 output – –

9 Radiator fan control relay 10 – 14 V Ignition switch ON and engine

coolant temperature 100°C or

lower

0 – 1 V Ignition switch ON and engine

coolant temperature 102.5°C or

higher

10 Main re lay 10 – 14 V Ignition switch OFF

0.4 – 1.5 V Ignition switch ON

11 Ignition switch 10 – 14 V Ignition switch ON

12 Blank – –

13 Blank – –

14 Diag. switch terminal 4 – 6 V Ignition switch ON

15 Test switch terminal 4 – 6 V Ignition switch ON

16 A/C (input) signal 10 – 14 V Ignition switch ON

A/C switch OFF

0 – 2 V Ignition switch ON

A/C switch ON

17 Electric load signal (+) 0 V Ignition switch ON, small light OFF

10 – 14 V Ignition switch ON, small light ON

18 Radiator fan control relay 10 – 14 V Ignition swi tch ON

Engine coolant temp.: 9.5°C or

lower

0 – 1 V Ignition switch ON

Engine coolant temp.: 97.5°C or

higher

19 Fuel pump relay 0 – 1 V For 2 seconds after ignition switch

10 – 14 V After the above time

20 Engine start switch (engine start signal) 6 – 12 V While engine cranking

0 V Other than above

21 Stop lamp switch 0 V Ignition switch ON, stop lamp

switch OFF

10 – 14 V Ignition switch ON, stop lamp

switch ON

22 Vehicle speed sensor Indicator

deflection

repeated 0 V

and 4 – 6 V

Ignition switch ON

Front left wheel turned slowly with

front right wheel locked

23 Blank – –

24 Blank – –

RESISTANCE CHECK

1. Turn ignition switch OFF.

1. Disconnect the ECM connectors (1) from the ECM.

CAUTION:

Never to uch terminals of th e ECM.

2. Check resistance between each connector terminal

with an ohmmeter (2).

CAUTION:

• Connect ohmmeter probe from wiring harnes s side

of connector.

• Resistance in the table below represents parts at

20°C.

TERMINAL

NO. CIRCUIT NORMAL

VOLTAGE CONDITION

G02 1 A/C evaporator outlet air temp. sen-

sor ––

2Blank – –

3Blank – –

4 A/C on/off output (A/T) 0 – 1 V A/C compressor operating

5 Engine torque sign al outp ut (A/T) Indicator

deflection

repeated 0V

and 10 – 14 V

Engine running at idle speed

6 D range idle-up signal (A/T) 10 – 14 V Ignition switch ON

7 Data link connector (serial data line) 4 – 6 V Ignition switch ON

8Blank – –

9 Malfunction indicator lamp (MIL) 0 – 1 V Ignition switch ON

10 – 14 V Engine running

10 Blank – –

11 Data link connector (K-line of

ISO 9141) 10 – 14 V Ignition switch ON

12 Torque signal output (A/T) Indicator

deflection

repeated 0V

and 10 – 14 V

Ignition switc h ON

13 Electric load signal (–) 0 – 2 V Ignition switch ON

Blower fan turned OFF

10 – 14 V Ignition switch ON

Blower fan turned ON

14 Ground for sensor – –

15 Throttle opening signal for TCM Indicator

deflection

repeated 0V

and 10 – 14 V

Ignition switc h ON

16 Tachometer 0 – 1 V Ignition switch ON

17 Coolant temp. signal output (A/T) Indicator

deflection

repeated 0V

and 10 – 14 V

Ignition switc h ON

TERMINALS CIRCUIT STANDARD

RESISTANCE

C42-7 to C41-11 HO2S 5.0 – 6.4 Ω

C42-9 to C41-5/6 No.1 injector 11.3 – 13.8 Ω

C42-21 to C41-5/6 No.2 injector 11.3 – 13.8 Ω

C42-31 to C41-5/6 No.3 injector 11.3 – 13.8 Ω

C42-8 to C41-5/6 No.4 injector 11.3 – 13.8 Ω

C42-28 to C41-5/6 EGR valve (stepper motor coil 4) 20 – 24 Ω

C42-17 to C41-5/6 EGR valve (stepper motor coil 3) 20 – 24 Ω

C42-29 to C41-5/6 EGR valve (stepper motor coil 2) 20 – 24 Ω

C42-18 to C41-5/6 EGR valve (stepper motor coil 1) 20 – 24 Ω

C42-4 to C41-5/6 EVAP canister purge valve 30 – 34 Ω

C41-19 to C41-11 Fuel pump relay 56 – 146 Ω

C41-18 to C41-5/6 Radiator fan control relay No.1 56 – 146 Ω

C41-10 to C41-7 Main relay 56 – 146 Ω

C42-1 to Body ground Ground Continuity

C42-2 to Body ground Ground Continuity

C42-3 to Body ground Ground Continuity

2.7 COMPONENT LOCATION

Legend

1. TP sensor 8. Radiator fan control relay No.2 15. TCM

2. MAP sensor 9. Radiator fan control relay No.3 16. ECM

3. IAC valve 10. EVAP canister purge valve 17. Diagnosis connector No.1

4. IAT sensor 11. ECT sensor 18. VSS

5. Radiator fan control relay

No.1 12. Ignition coil with igniter 19. Knock sensor

6. Main relay 13. HO2S 20. CMP sensor

7. Fuel pump relay 14. CKP sensor 21. EGR valve

2.8 TABLE A-1 MALFUNCTION INDICATOR LAMP CIRCUIT CHECK LAMP

DOES ILLUMINATE WITH IGNITION SWITCH ON (EN GINE NOT RUNNING)

WIRING DIAGRAM

Legend

CIRCUIT DESCRIPTION

When the ignition switch is turned ON, the EC M causes the main relay to turn ON (close the contact point).

Then, with the ECM being supplied with the main power, it turns ON the malfunction indicator lamp (MIL).

When t he eng ine starts to run and no ma lfunctio n is de tected in th e system, the MIL goes OFF, but if a mal-

function was or is detected, the MIL remains ON even when the engine is running.

INSPECTION

1. BATT fuse 3. IG fuse 5. Diagnosis connector

No. 1 6. MIL

2. Main fuse box 4. To battery 7. To ignition switch

Step Action Yes No

1 MIL Power Supply Check.

1) Turn ignition switch ON.

Do other indicator/warning lights in combination

meter comes ON?

Go to Step 2. IG fuse blown, main fuse

blown, ignition switch

malfunction, BLK/WHT

circuit between IG fuse

and combination meter or

poor coupler connection

at combinati on meter.

2 ECM Power and Ground Circuit Check.

Does engine start? Go to Step 3. Go to 2.12 TABLE A-5

ECM POWER AND

GROUND CIRCUIT

CHECK.

If engine is not cranked,

go to 2. DIAGNOSIS in

Section 6G.

3 MIL Circuit Check.

1) Turn ignition switch OFF and disconnect con-

nectors from ECM.

2) Check for proper connection to ECM at termi-

nal G02-9.

3) If OK, then using service wire, ground terminal

G02-9 in disconnected connector.

Does MIL turn on at ignition switch ON?

Substitute a known-

good ECM and

recheck.

Bulb burned out or PPL/

WHT wire circuit open.

Test switch terminal cir-

cuit grounded

2.9 TABLE A-2 MALFUNCTION INDICATOR LAMP CIRCUIT CHECK

LAMP REMAINS ON AFTER ENGINE STARTS

WIRING DIAGRAM / CIRCUIT DESCRIPTION

Refer to TABL E A-1.

INSPECTION

Step Action Yes No

Diagnostic Trouble Code (DT C) Check.

1) Check DTC, refer to 2.4 ENGINE

DIAGNOSTIC FLOW TABLE.

Is there any DTC(s)?

Go to Step 2 of 2.4

ENGINE DIAGNOS-

TIC FLOW TABLE .

Go to Step 2.

DTC Check.

1) St a r t en gine a nd r ec hec k DTC while e ngi ne

running.

Is there any DTC(s)?

Go to Step 3.

MIL Circuit Check.

1) Turn OFF ignition switch.

2) Disconnect con nectors from EC M.

Does MIL turn ON at ignition switch ON?

PPL/WHT wire cir-

cuit shorted to

ground.

Substitute a known-

good ECM and recheck.

2.10 TABLE A- 3 MIL CHECK

MIL FLASHES WITH IGNITION SWITCH ON

WIRING DIAGRAM / CIRCUIT DESCRIPTION

Refer to TABL E A-1.

INSPECTION

Step Action Yes No

MIL Flashing Pattern Check.

1) Turn ignition switch ON.

Does lamp flashing p attern indicate diagnostic

trouble cod e?

Go to Step 2. Substitut e a known-

good ECM and recheck.

Diag. Switch Circuit Check.

Is dia g. switch terminal connecte d to groun d via

service wire?

System is in good

condition. PPL/WHT circuit

shorted to ground. If cir-

cuit is OK substitute a

known-good ECM and

recheck.

2.11 TABLE A-4 MIL CHECK MIL DOES NOT FLASH OR REMAINS ON EVEN WITH

GROUNDED DIAGNOSIS SWITCH TERMINAL

WIRING DIAGRAM / CIRCUIT DESCRIPTION

Refer to TABL E A-1.

INSPECTION

Step Action Yes No

MIL Circuit Check.

1) Turn ignition switch OFF and disconnect

connectors from ECM.

Does MIL turn ON at ignition switch ON?

PPL/WHT ci rc ui t

shorted to ground. Go to Step 2.

ECM Conn ection Check.

1) Turn ignition switc h OFF.

Is connector C41-14 connected to ECM prop-

erly?

Go to Step 3. Poor connector c onnec-

tion.

Diag. Switch Terminal Circuit Check.

1) Connect connectors to ECM.

2) Using se rvice wire, ground C41-14 terminal

with connectors connected to ECM.

3) Turn ignition switch ON.

Does MIL flash?

PPL/WHT or BLK

circuit open. Substi tute a known-

good ECM and recheck.

2.12 TABLE A-5 ECM POWE R AND GROUND CIRCUIT CHECK

MIL DOESN’T ILLUMINATE WITH IGNITION ON AND ENGINE WON’T S TART THOUGH

IT IS CRANKED

WIRING DIAGRAM

CIRCUIT DESCRIPTION

When the ig nit ion s wi tch tu ned O N, the main r el ay tu rns O N ( th e c on tact p oin t c l oses ) and th e mai n powe r is

supplied to ECM.

INSPECTION

1. BATT fuse 3. IG fuse 5. Diagnosis connector No. 1

2. Main fuse box 4. To battery 6. MIL

Step Action Yes No

1 Main Relay Operating Sound Check.

Is operating sound of main relay heard at ignition

switch ON?

Go to Step 5. Go to Step 2.

2 Main Relay Check.

1) Turn OFF ignition switch and remove main

relay (1).

2) Check for proper connection to main relay (1).

3) Check resistance between each two

terminals. See Fig. 1 and 2.

Between terminals C and D: Infinity

Between terminals A and B: 56 – 146 Ω

4) Check that there is continuity between

terminals C and D when battery is connected

to terminals A and B. See Fig. 3.

Is main relay in good condition?

Go to Step 3. Replace main relay.

3 Fuse Check.

Is main fuse in good condition? See Fig. 4. Go to Step 4. Check for short in circuits

connected to this fuse.

Fig. 1 for Step 2

Fig. 2 for Step 2

4 ECM Power Circuit Check.

1) Turn OFF ignition switch, disconnect

connectors from ECM and install main relay.

2) Check for proper connection to ECM at

terminals C41-11, C41-10, C41-5 and C41-6.

3) If OK, measure voltage between terminal

C41-11 and groun d, C41- 10 and groun d with

ignition switch ON.

Is each voltage 10 – 14 V?

Go to Step 5. BLK/WHT, BLK/YEL or

BRN/WHT circuit open.

5 ECM Power Circuit Check.

1) Using service wire, ground terminal C41-10

and measure voltage between terminal C41-5

and ground at ignition swi tc h ON.

Is it 10 – 14 V?

Check ground circuits

BRN/WHT and BLK/

YEL for open.

If OK, substitute a

known-good ECM

and rechec k.

Go to Step 6.

6 Is operating sound of main relay heard in Step 1? Go to Step 7. BLK/YEL or BLK/RED

wire open.

7 Main Relay Check.

1) Check main relay according to procedure in

Step 2.

Is main relay in good condition?

BLK/YEL or BLK/

RED wire open. Replace main relay.

Step Action Yes No

Fig. 3 for Step 2

Fig. 4 for Step 3

2.13 DTC P0105 (DTC NO.11) MANIFOLD ABSOLUTE PRESSURE (M AP) CIRCUIT

MALFUNCTION & DTC P0106 (DTC NO.1 1) MANIFOLD ABSOLUTE PRESSURE (MAP)

RANGE / PE RFORMANCE PROBLEM

WIRING DIAGRAM / CIRCUIT DESCRIPTION

NOTE:

• When this DTC and DTC P0120 (No.13) are indicated together, it is possible that GRY/RED circuit is

open.

• When DTC P01 05 (No.11), P0 110 (No.18 ), P0115 (No.19 ) and P012 0 (No.13) are indicated toge ther, it is

possible that ORN circuit is open.

DTC CONFIRMATION PRO CEDURE

1. Clear DTC, start engine and keep it at idle for 1 min.

2. Check DTC using diagnosis connector No.1 or Tech 2.

ECM

GRY/RED

ORN

C42-22

AMP

C42-26

RED/WHT

C42-10

C42 (31P) C41 (24P) G02 (17P)

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910

1718 8

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DTC DETECTING CONDITION POSSIBLE CAUSE

• MAP s ensor signal is 0.19 V or lower

(Low pressure – High vacuum – Low voltage)

• MAP sensor signal is 4.5 V or higher

(High pressure – Low vacuum – High voltage)

• Variation of MAP sensor signal (manifold pres-

sure) is lower than specificatio n at cold start

• ORN circuit open

• GRY/RED circuit open or shorted to ground

• RED/WHT circuit op en or shorted to gr ound

• MAP sensor malfunction

• ECM malfunction

MAP SENSOR INDIVIDUAL CHECK

1. Disconnect connector from MAP sensor (1).

2. Remove MAP sensor.

3. Arrang e 3 new 1.5 V b atteries ( 2) in seri es (check th at

total voltage is 4.5 – 5.0 V) and connect its positive

terminal to V-in terminal of sensor and negative

terminal to Ground terminal. Then check voltage

between V-out and Ground.

Also, check i f v olta ge reduces when vacuum i s app lied

up to 400 mmHg by using vacuum pump (3).

Outp ut vo ltage (W he n inp u t vo l tage is 4 . 5 – 5. 5 V, am bi -

ent temp. 20 – 30°C)

If check result is not satisfactory, replace MAP sensor (1).

4. Install MAP sensor (1) securely.

5. Connect MAP sensor (1) connector securely.

INSPECTION

NOTE:

When battery voltage is applie d to GRY/RED wire, it is possible tha t MAP sensor is also fault y.

Fig. 1 for Step 3

ALTITUDE (Reference) BAROMETRIC PRESSURE OUTPUT VOLTAGE

(m) (mmHg) (kPa) (V)

0 – 610 760 – 707 100 – 94 3.3 – 4.3

611 – 1524 707 – 634 94 – 85 3.0 – 4.1

1525 – 2438 634 – 567 85 – 76 2.7 – 3.7

2439 – 3048 567 – 526 76 – 70 2.5 – 3.3

Step Action Yes No

1 Was ENGINE DIAG. FLOW TABLE performed? Go to Step 2. Go to 2.4 ENGINE DIAG.

FLOW TABLE.

2 Check Wire Harness.

1. Disconnect MAP sensor connector with ignition

switch OFF.

2. Check for proper connection of MAP sensor at

RED/WHT and GRY/RED wire terminals.

3. If OK, then with ignition switch ON, check voltage

between each of GRY/RED or RED/WHT wire

terminals and body ground. See Fig. 1.

Is voltage about 4 – 6 V at each terminal?

Go to Step 3. GRY/RED wire open or

shorted to ground circuit or

shorted to power

circuit (See NOTE), RED/

WHT wire open or shorted

to ground, poor C42-26 con-

nection or C42-22 connec-

tion.

If wire and connection are

OK, confirm that MAP sen-

sor is normal and th en sub-

stitute a known-good ECM

and recheck.

3 Check MAP sensor.

1. Chec k MAP sensor according to MAP Sensor

Individual Check mentioned previously.

Is it in good condition?

GRY/RED wire shorted

to ORN wire, RED/WHT

wire op en , poo r C42-1 0

connection.

If wire and connection

are OK, substitute a

known-good ECM and

recheck.

Replace MAP sensor .

2.14 DTC P011 0 (DTC NO.18) INTAKE AIR TEMP. (IAT) CIRCUIT MALFUNCTION

WIRING DIAGRAM / CIRCUIT DESCRIPTION

NOTE:

• When DTC P01 05 (No.11), P0 110 (No.18 ), P0115 (No.19 ) and P012 0 (No.13) are indicated toge ther, it is

possible that ORN circuit is open.

• Before inspecting, be sure to check that ambient temperature is higher than – 40°C.

DTC CONFIRMATION PRO CEDURE

1. Clear DTC, start engine and keep it at idle for 1 min.

2. Check DTC using diagnosis connector No. 1 or Tech 2.

INSPECTION

C42-10

C42-15

ECM

LT GRN/BLK

ORN

C42 (31P) C41 (24P) G02 (17P)

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1718 8

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DTC DETECTING CONDITION POSSIBLE CAUSE

• Low intake air temperature (High voltage-High resis-

tance)

• High intake air temperature (Low voltage-Low resis-

tance)

• LT GRN/BLK circuit op en or shor ted to

power.

• ORN circuit open

• IAT sensor malfunction

• ECM malfunction

Step Action Yes No

1 Was ENGINE DIAG. FLOW TABLE performed? Go to Step 2. Go to 2.4 ENGINE DIAG.

FLOW TABLE.

2 Check Wire Harness.

1. Disconnect IAT sensor connector with

ignition switch OFF.

2. Check for proper connection to IAT sensor at

LT GRN/BLK and ORN wire terminals.

3. If OK, then with ignition switch ON, is voltage

applied to LT GRN/BLK wire terminal about

4 – 6 V? See Fig. 1.

Go to Step 3. LT GRN/BLK wire open

or shorted to ground, or

poor C42-15 connection.

If wire and connection

are OK, substitute a

known-good ECM and

recheck.

Fig. 1 for Step 2

3 Check Wire Harness.

1. Connect connector to IAT sensor.

2. Turn igniti on ON .

3. Measure voltage between ORN wire

terminal and engine body at IAT sensor

connector.

Is it 0 V?

Go to Step 4. ORN wire open or

shorted to power supply.

If wire is OK, substitute a

known good ECM and

recheck.

4 Check Wire Harness.

Turn ignition switch OFF.

Disconnect IAT sensor connector.

Measure resistance between ORN wire terminal

and engine body at IAT sensor connector.

Is it less than 1Ω

Go to Step 5. ORN wire open or

shorted to power supply.

If wire is OK, substitute a

known good ECM and

recheck.

5 Check IAT sensor, refer to Section 6E1

2.3 ELECTRONIC CONTROL SYSTEM - INTAKE

AIR TEMPERATURE SENSOR.

Is sensor OK?

Perform connection

of IAT and ECM con-

nector. If OK, substi-

tute a known good

ECM and recheck.

Replace IAT sensor.

Step Action Yes No

2.15 DTC P0115 (DTC NO.19) ENGINE COOLANT TEMPERATURE (ECT)

CIRCUIT MALFUNCTION

WIRING DIAGRAM / CIRCUIT DESCRIPTION

NOTE:

• Before inspecting, check that the coolant temp. meter in the combination meter indicates normal operating

temperature (Engine is not overheating).

• When DTC P01 05 (No.11), P0 110 (No.18 ), P0115 (No.19 ) and P012 0 (No.13) are indicated toge ther, it is

possible that ORN circuit open.

DTC CONFIRMATION PRO CEDURE

1) Clear DTC, start engine and keep it at idle for 1 min.

2) Check DTC using diagnosis connector No. 1 or Tech 2.

INSPECTION

DTC DETECTING CONDITION POSSIBLE CAUSE

• Low engine coolant temperature (High voltage-

High resistance) or,

• High engine coolant temperature (Low voltage-

Low resistance)

• LT GRN circuit open or shorted to power

• ORN circuit open

• ECT sens or malfun ct ion

• ECM malfunction

Step Action Yes No

1 Was ENGINE DIAG. FLOW TABLE performed? Go to Step 2. Go to 2.4 ENGINE DIAG.

FLOW TABLE.

2 Check Wire Harness.

1. Turn off ignition switch.

2. Disconnect ECT sensor connector.

3. Check for proper connection to ECT sensor

at LT GRN and ORN wire terminals.

4. If OK, then turn on ignition switch ON.

Is voltage applied to LT GRN wire terminal about

4 – 6 V? See Fig. 1.

Go to Step 3. LT GRN wire open or

shorted to ground, or

poor C42-14 connection.

If wire connection is OK,

substitute a known -good

ECM and recheck.

Fig. 1 for Step 2

Fig. 2 for Step 5

Fig. 3 for Step 6

3 Check Wire Harness.

1. Connect connector to ECT sensor.

2. Turn igniti on ON .

3. Measure voltage between ORN wire

terminal and engine body at ECT sensor

connector.

Is it 0 V?

Go to Step 4. ORN wire open or

shorted to power supply.

If wire is OK, substitute a

known good ECM and

recheck.

4 Check Wire Harness.

1. Turn igniti on ON .

2. Disconnect ECT sensor connector.

3. Measure resistance between ORN wire

terminal and engine body at ECT sensor

connector.

Is it less than 1 Ω?

Go to Step 5. ORN wire open or

shorted to power supply.

If wire is OK, substitute a

known-good ECM and

recheck.

5 Check ECT sensor, refer Section 6E1

2.3 ELECTRONIC CONTROL SYSTEMENGINE

COOLANT TEMPERATURE SENSOR.

Is sensor OK.

Perform connection

of ECT and ECM

connector . If OK, sub-

stitute a known good

ECM and recheck.

Replace ECT sensor.

Step Action Yes No

2.16 DTC P0120 (DTC NO.13) THROTTLE POSITION CIRCUIT MALFUNCTION

WIRING DIAGRAM / CIRCUIT DESCRIPTION

NOTE:

• When DTC P01 05 (No.11), P0 110 (No.18 ), P0115 (No.19 ) and P012 0 (No.13) are indicated toge ther, it is

possible that ORN or GRY/RED circuit is open.

• When this DTC and DTC P0105 (No.11) are indicated together, it is possible that GRY/RED circuit is

open.

DTC CONFIRMATION PRO CEDURE

1. Clear DTC, start engine and keep it at idle for 1 min.

2. Check DTC using diagnosis connector No. 1 or Tech 2.

INSPECTION

DTC DETECTING CONDITION POSSIBLE CAUSE

• Sign al vo ltage high

• Sign al vo ltag e low

• ORN circuit open

• GRY/BLU circuit open or shorted to ground

• GRY/RED circuit open or shorted to power or

ground

• TP sensor malfunction

• ECM malfunction

Step Action

YES

1 Was ENGINE DIAG. FLOW TABLE performed? Go to Step 2. Go to ENGINE DIAG.

FLOW TABLE.

2 Check Wire Harness.

1. Disconnect connector from TP sensor with

ignition switch OFF.

2. Check for proper connection to TP sensor at

GRY/RED, GRY/BLU and ORN wire

terminal.

3. If OK, then with ignition switch ON, check

voltage between each of GRY/RED or GRY/

BLU wire terminals and body ground. See

Fig. 1.

Is voltage about 4 – 6 V at each terminal?

Go to Step 4. GRY/RED wire open,

GRY/RED wire shorted to

ground circuit or power

circuit or GRY/BLU wire,

ORN wire open or

shorted to ground circuit

or poor C42-22 or C42-

16 connection.

If wire and connection

are OK, substitute a

known-good ECM and

recheck.

Fig. 1 for Step 2

Fig. 2 for Step 3

Check TP Sensor.

1. Check resistance between terminals of TP

sensor. See Fig. 2.

Between 1 and 2: 2.5 – 6.0 kΩ

Between 1 and 3: 100 Ω – 20 kΩ

varying according to throttle valve opening

Are mea s ured values within specifications?

Intermittent trouble.

Check for intermit-

tent, refer to

1.7 ELECTRICAL

CIRCUIT

INSPECTION

PROCEDURE -

INTERMITTENT

AND POOR

CONNECTION in

Section 0A.

ORN wire open or

poor C42-10

connection.

If wire and connec-

tion are OK, substi-

tute a known-good

ECM and recheck.

Replace TP sensor.

Step Action

YES

2.17 DTC P0130 (DTC NO.14) HEATED OXYGEN SENSOR (HO2S)

CIRCUIT MALFUNCTION

WIRING DIAGRAM / CIRCUIT DESCRIPTION

DTC CONFIRMATION PRO CEDURE

WARNING:

• When performing a road test, select a place whe re there is no traffic or possibility of an accident.

Take care during testing.

• Road test should be carried out with 2 persons, a driver and a tester.

1. Turn ignition OFF. Clear DTC with ignition switch ON, check vehicle and environmental condition for:

•Altitude (barometric pressure) : 2400 m, 8000 ft or less (560 mmHg, 75 kPa or more)

•Ambient temp.: –10°C or higher

•Intake air temp.: 70°C or lower

2. Warm up engine to normal operating temperature.

3. Drive vehicle at 50 – 60 km /h for 2 min.

4. Stop vehicle and run engine at idle for 2 min.

5. Repeat Steps 2 – 4.

6. Check DTC using diagnosis connector No.1 or Tech 2.

ECM

WHT

ORN C42-10

C42-13

E11

C42 (31P) C41 (24P) G02 (17P)

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DTC DETECTING CONDITION POSSIBLE CAUSE

• When running at idle speed after engine

warmed up and running at specified vehicle

spee d, HO2S output voltage does not go below

0.3 V or over 0.6 V.

• Heated oxygen sensor malfunction

• WHT or ORN circuit open (poor connection) or

short

INSPECTION

Fig. 1 for Step 3

Fig. 2 for Step 3

Step Action Yes No

1 Was ENGINE DIAG. FLOW TABLE performed? Go to Step 2. Go to 2.4 ENGINE DIAG.

FLOW TABLE.

2 Is there DTC(s) other than HO2S (DTC P0130)? Go to applicable DTC

Diag. Table. Go to Step 3.

3 Check HO2S signal.

1. Warm up engine to normal operating

temperature and keep it at 2000 r/min. for 60

sec.

2. Repeat racing engine (Repeat depressing

accelerator pedal 5 to 6 times continuously

and take foot off from pedal to richen and lean

the A/F mixture).

3. Check voltage between terminal C50-13 and

terminal C50-10 in the connector connected

to the ECM. See Fig. 1 and 2.

Does HO2S output voltage deflect between 0.2 V

and over 0.45 V repeatedly?

Intermittent trouble.

Check for intermit-

tent, refer to

1.7 ELECTRICAL

CIRCUIT

INSPECTION

PROCEDURE -

INTERMITTENT

AND POOR

CONNECTION in

Section 0A.

If checks are OK, go

to DTC P0135 (DTC

No. 14) HEATED

OXYGEN SENSOR

(HO2S) HEATER

CIRCUIT

MALFUNCTION.

Check WHT and ORN

wires for open and short,

and connections for poor

connection.

If wires and connections

are OK, go to DTC P0135

(DTC No. 14) HEATED

OXYG EN SENSOR

(HO2S) HEATER CIR-

CUIT MALFUNCTION.

If checks are OK, replace

HO2 sensor.

2.18 DTC P0135 (DTC NO.14) HEATED OXYGEN SENSOR (HO2S)

HEATER CIRCUIT MALFUNCTION

WIRING DIAGRAM / CIRCUIT DESCRIPTION

DTC CONFIRMATION PRO CEDURE

WARNING:

• When performing a road test, select a place whe re there is no traffic or possibility of an accident.

Take care during testing.

• Road test should be carried out with 2 persons, a driver and a tester.

1. Turn ignition switch OFF.

2. Clear DTC with ignition switch ON, start engine and keep it at idle for 1 min.

3. Start vehicle and depress accelerator pedal fully for 5 sec. or longer.

4. Stop vehicle.

5. Repeat Steps 3 – 4.

6. Check DTC using diagnosis connector No. 1 or Tech 2.

ECM

BLK/WHT

RED/BLU C42-7

IG1

C42 (31P) C41 (24P) G02 (17P)

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DTC DETECTING CONDITION POSSIBLE CAUSE

DTC will set when one of the following conditions is

met:

• Low voltage at terminal C42-7 when engine is

running at high load.

• High voltage at terminal C42-7 when engine is

running under condition other than above.

• HO2S heater circuit open or shorted to ground

• ECM malfunction

INSPECTION

Fig. 1 for Step 2

Fig. 2 for Step 3

Step Action Yes No

1 Was ENGINE DIAG. FLOW TABLE performed? Go to Step 2. Go to 2.4 ENGINE DIAG.

FLOW TABLE.

2 Check Heater for operation.

1. Check voltage at terminal C42-7. See Fig. 1.

2. Warm up engine to normal operating temper-

ature.

3. Stop engine.

4. Turn ignition switch ON and check voltage at

terminal C42-7. See Fig. 1. V oltage should be

over 10 V.

5. S tart engine, run it at idle and check voltage at

the same terminal. Voltage should be below

1.9 V.

Are check results are speci fied?

Intermittent trouble.

Check for intermit-

tent, refer to

1.7 ELECTRICAL

CIRCUIT

INSPECTION

PROCEDURE -

INTERMITTENT

AND POOR

CONNECTION in

Section 0A.

Go to Step 3.

3 Check Heater of Sensor.

1. Disconnect HO2S coupler with ignition

switch OFF.

2. Check for proper connection to HO2S at BLK/

WHT and RED/BLU wire terminals.

3. If OK, then check heater resistance. See Fig.

Is it 5.0 – 6 .4 Ω at 20°C?

RED/BLU wire open

or shorted to ground

or poor connection at

C42-7. If wire and

connection are OK,

substitute a known-

good ECM and

recheck.

Replace HO2S.

2.19 DTC P0325 (DTC NO.17) KNOCK SENSOR CIRCUIT MALFUNCTION

WIRING DIAGRAM / CIRCUIT DESCRIPTION

DTC CONFIRMATION PRO CEDURE

1. Clear DTC, start engine and keep it at idle for 1 min.

2. Check DTC using diagnosis connector No. 1 or Tech 2.

DTC DETECTING CONDITION POSSIBLE CAUSE

• Knock sensor voltage is 3.91 V or more

• Knock sensor voltage is 1.23 V or less

• RED circuit open or shorted to ground

• Knock sensor malfunction

• ECM malfunction

INSPECTION

Fig. 1 for Step 2

Fig. 2 for Step 2

Step Action Yes No

1 Was ENGINE DIAG. FLOW TABLE performed? Go to Step 2. Go to 2.4 ENGINE DIAG.

FLOW TABLE.

2 Check Kn ock Sensor Si gna l.

1. With engine running, check voltage from

C42-25 terminal of ECM connector to body

ground. See Fig. 1.

Is voltage about 1.23 – 3.91 V?

Knock sensor and its

circuit are in good

condition.

Intermittent trouble or

faulty ECM.

Recheck, refer to

1.7 ELECTRICAL

CIRCUIT

INSPECTION

PROCEDURE -

INTERMITTENT

AND POOR

CONNECTIONin

Section 0A.

Go to Step 3.

3 Check Kn ock Sensor Ou tput .

1. Stop engine.

2. With ignition switch at OFF position,

disconnect knock sensor connector.

3. With ignition switch at ON position, check

voltage from RED terminal of knock sensor

connector to body ground. See Fig. 2.

Is it 4 – 5 V?

Faulty knock sensor.

Substitute a known-

good knock sensor

and rechec k.

RED wire open, shorted

to ground circuit or poor

C42-25 connection.

If wire and connection

are OK, substitute a

known-good ECM and

recheck.

2.20 DTC P0335 (DTC NO.23) CRANKSHAFT POSITION (CKP)

SENSOR CIRCUIT MALFUNCTION

WIRING DIAGRAM / CIRCUIT DESCRIPTION

REFERENCE

Connect oscilloscope between terminals C42-23 of ECM connect to while connected to the ECM and to

ground and check CKP sensor signal.

Legend

DTC CONFIRMATION PRO CEDURE

1. Clear DTC and crank engine for 2 sec.

2. Check DTC using diagnosis No. 1 connector or Tech 2.

ECM

BLK/RED

YEL/BLK

C42-23

BLK/ORN

C42 (31P) C41 (24P) G02 (17P)

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DTC DETECTING CONDITION POSSIBLE CAUSE

• No CKP sensor signal for 2 seconds at engine

cranking.

• No engine start signal with engine cranking.

• CKP sensor circuit open or short.

• Cranks ha ft timi ng ch ai n pu l le y te et h da m ag e d.

• CKP sensor malfunct ion, foreign material being

attached or improper installation.

• ECM malfunction.

• Engine start s ignal circuit malfunction.

1. BTDC 5° (Crank angle) [B] : Waveforms at specified idle speed

[A] : Oscilloscope Waveforms [C] : Waveforms at 2000 r/min

INSPECTION

Step Action Yes No

1 Was ENGINE DIAG. FLOW TABLE performed? Go to Step 2. Go to 2.4 ENGINE DIAG.

FLOW TABLE.

2 Check CKP Sensor and Connector for proper

installation.

Is CKP sensor installed properly and connector

connected securely?

Go to Step 3. Rectify and recheck.

3 Check Wire Harness and Connection.

1. Disconnect connector from CKP sensor.

2. Check for proper connection to CKP sensor

at each terminal.

3. If OK, turn ignition switch ON and check for

voltage at each terminal of the disconnected

sensor connector. See Fig. 1.

Terminal B+: 10 – 14 V

Terminal Vout: 4 – 5 V

Terminal GND: – 0 V

Is check result satisfactory?

Go to Step 5. Go to Step 4.

4 Was terminal V out voltage out of specification in

Step 3 check? YEL/BLK wire open,

short or poor connec-

tion.

If wire and connec-

tion are OK, substi-

tute a known-good

ECM and recheck.

BLK/RED or BLK/ORN

wire open, short or poor

connection.

5 Check Ground Circuit for open.

1. Turn ignition swi tc h OFF.

2. Check for continuity between GND terminal

of CKP sensor connector and engine

ground.

Is continui ty ind ic ate d?

Go to S tep 6. BLK/ORN wire open or

poor ground connection.

6 Check engine start signal.

1. Check voltage at terminal C41-20 of

connector while connected to the ECM and

to engine ground with engine cranking.

Is the voltage more than 6 V?

Go to Step 7. BLK/YEL circuit open or

short to ground.

If wire is OK, check

starter motor, refer to

Section 6G, CRANKING

SYSTEM.

7 Check CKP Sensor for operation.

1. Remove CKP sensor from cylinder block.

2. Remove metal particles on end face of CKP

sensor, if any.

3. Connect each connector to ECM and CKP

sensor.

4. Turn ignition swi tc h ON.

5. Check for voltage at terminal C42-23 of

connector while connected to the ECM by

passing a magnetic substance (iron) while

keeping approximately 1 mm gap with respect

to end face of CKP sensor. See Fig. 2 and 3.

Does voltage vary from low (0 –1 V) to high (4 – 5

V) or from high to low?

Go to Step 8. Replace CKP sensor.

Fig. 1 for Step 3

Fig. 2 for Step 7

Fig. 3 for Step 7

Fig. 4 for Step 8

8 Check Signal Rotor for the following. See Fig. 4.

•Damage

• No foreign material attached

Is it in good condition?

Intermittent trouble or

faulty ECM.

Check for intermit-

tent, refer to

1.7 ELECTRICAL

CIRCUIT

INSPECTION

PROCEDURE -

INTERMITTENT

AND POOR

CONNECTIONin

Section 0A.

Clean rotor teeth or

replace CMP sensor.

Step Action Yes No

2.21 DTC P0340 (DTC NO.15) CA MSHAFT POSITION (CMP)

SENSOR CIRCUIT MALFUNCTION

WIRING DIAGRAM / CIRCUIT DESCRIPTION

REFERENCE

Connect oscilloscope between terminals C42-11 of the ECM connector while connected to the ECM and body

ground and check CMP sensor signal. When CKP circuit is failed (open or short), the ECM will identify the cyl-

inders only by CMP sensor signal.

Legend

DTC CONFIRMATION PRO CEDURE

1) Clear DTC.

2) Start engine and keep it at idle for 1 min.

3) Check DTC using diagnosis connector No. 1 or Tech 2.

ECM

BLK/RED

RED/YEL

BLK/ORN

C42 (31P) C41 (24P) G02 (17P)

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C42-11

DTC DETECTING CONDITION POSSIBLE CAUSE

• No CMP sensor signal during engine running

(CKP sensor signal is inputted).

• Mismatch input signal compared to crankshaft

position signal.

• CMP sensor circuit open or short.

• S ignal rotor teeth dam aged.

• CMP sensor malfunction, foreign material being

attached or improper installation.

• Incorrect starter signal.

• ECM malfunction.

1. No.1 cylinder 3. No.3 cylinder [A]: Oscilloscope Waveforms [C]: CKP sensor signal

2. No.2 cylinder 4. No.4 cylinder [B]: Waveforms at specified

idle speed [D]: CMP senso r signa l

INSPECTION

Step Action Yes No

1 Was ENGINE DIAG. FLOW TABLE performed? Go to Step 2. Go to 2.4 ENGINE DIAG.

FLOW TABLE.

2 Check CMP Sensor and connector for proper

installation.

Is CMP sensor installed properly and connector

connected securely?

Go to Step 3. Rectify and recheck.

3 Check Wire Harness and Connection.

1. Disconnect connector from CMP sensor.

2. Check for proper connection to CMP sensor

at each terminal.

3. If OK, turn ignition switch ON and check for

voltage at each terminal of sensor connector

disconne cte d. See F ig. 1.

Terminal B+: 10 – 14 V

Terminal V-out: 4 – 5 V

Terminal GND: 0 V

Is check result satisfactory?

Go to Step 5. Go to Step 4.

4 Was terminal V-out voltage out of specification in

Step 3 check? RED/YEL wire open,

short or poor connec-

tion.

If wire and connec-

tion are OK, substi-

tute a known-good

ECM and recheck.

BLK/RED or BLK/ORN

wire open, short or poor

connection.

5 Check Ground Circuit for Open.

1. Turn ignition swi tc h OFF.

2. Check for continuity between GND terminal

of CMP sensor connector and engine

ground.

Is continui ty ind ic ate d?

Go to S tep 6. BLK/ORN wire open or

poor ground connection.

Fig. 1 for Step 3

Fig. 2 for Step 6

6 Check CMP Sensor for Operation.

1. Remove CMP sensor from sensor case.

2. Remove metal particles on end face of CMP

sensor, if any.

3. Connect each connector to ECM and CMP

sensor.

4. Turn ignition swi tc h ON.

5. Check for voltage at terminal C42-11 of

connector while connected to the ECM by

passing a magnetic substance (iron) while

keeping approximately 1 mm gap with

respect to end face of CMP sensor. See Fig.

2 and 3.

Does voltage vary from low (0 – 1 V) to high (4 – 5

V) or from high to low?

Go to Step 7. Replace CMP sensor.

7 Check Signal Rotor for the following.

See Fig. 4.

•Damage

• No foreign material attached

Is it in good condition?

Intermittent trouble or

faulty ECM.

Check for intermit-

tent, refer to

1.7 ELECTRICAL

CIRCUIT

INSPECTION

PROCEDURE -

INTERMITTENT

AND POOR

CONNECTIONin

Section 0A.

Clean rotor teeth or

replace CMP sensor.

Step Action Yes No

Fig. 3 for Step 6

Fig. 4 for Step 7

2.22 DTC P0500 (DTC NO.16) VE HICLE SPEED SENSOR (VSS) MALFUNCTION

WIRING DIAGRAM / CIRCUIT DESCRIPTION

Legend

DTC CONFIRMATION PRO CEDURE

WARNING:

• When performing a road test, select a place whe re there is no traffic or possibility of an accident.

Take care during testing.

• Road test should be carried out with 2 persons, a driver and a tester.

1. Clear DTC and warm up engine to normal operating temperature.

2. Increase vehicle speed to 80 km/h in 3rd gear or 2 range while observing vehicle speed displayed on

Tech 2.

3. Relea se ac celerato r ped al and w ith eng ine brake ap plied , keep vehic le coas ting ( fuel c ut con dition ) for 4

sec. or more.

4. Check DTC using diagnosis connector No. 1 or Tech 2.

1. VSS (vehicle speed sensor) 4. T o S peedometer , P/S control module 7. ECM

2. VSS connector 5. TCM

3. Power supply from ignition switch 6. TCM Connector

DTC DETECTING CONDITION POSSIBLE CAUSE

• No VSS signal input while vehicle running in D

range or during fuel cut at deceleration. • BLK/ORN circuit open

• PPL or BLK/RED circuit open or short

• VSS malfunction

• ECM malfunction

• Speedometer malfunction

• TCM Malfunction

INSPECTION

Step Action Yes No

1 Was ENGINE DIAG. FLOW TABLE performed? Go to Step 2. Go to 2.4 ENGINE DIAG.

FLOW TABLE.

2 Is vehicle equipped with A/T? Go to Step 9. Go to Step 3.

3 Does speedometer indicate vehicle speed? Go to Step 4. Go to Step 6.

4 Check Vehicle Speed Signal.

Is vehicle speed displayed on Tech 2 in step 2 and 3 of

DTC confirm at ion proce dure ?

Intermittent trouble or

faul ty ECM.

Check for intermittent,

refer to

1.7 ELECTRICAL

CIRCUIT INSPECTION

PROCEDURE -

INTERMITTENT AND

POOR CONNECTION

in Section 0A.

Go to Step 4.

5 Check VSS Signal Circuit.

1. Turn ignition switch to OFF position.

2. Disconnect combination meter connectors, refer

to Section 8.

3. Disconnect P/S control module connector.

4. Turn ignition switch to ON position, without

running engine.

5. Measure voltage from terminal a of VSS

connector to ground.

Is voltage within 4 – 5 V?

Faulty speedometer.

Faulty P/S control mod-

ule.

PPL wire open or short.

Poor connection of ECM

connector terminal.

If OK, substitute a known-

good ECM and rec hec k.

6 Check VSS Power Supply.

1. With ignition switch at O FF position, disconnect

VSS connector.

2. Turn ignition switch to ON position, without

running engine.

3. Measure voltage from terminal b to c of VSS

connector. See Fig. 1.

Is voltage within 10 – 14 V?

Go to Step 7. BLK/RED or BLK/ORN wire

open or short.

7 Check VSS Signal Circuit.

1. Measure voltage from terminal a of VSS

connector to ground.

Is voltage more than 4 V?

Go to Step 8. PPL wire open or short.

Poor connection of ECM

connector terminal.

If OK, substitute a known-

good ECM and rec hec k.

8 Check speedometer drive gear.

1. Remove VSS.

2. Visually inspect speedometer drive gear for

damage.

Was any damage found?

Faulty speedometer

drive gear. Poor connection of VSS

connector terminal.

If OK, substitute a known-

good VSS and recheck.

9 Does speedometer indicate vehicle speed? Go to Step 10. Go to Step 11.

10 Check VSS Signal circuit.

1. Turn ignition switch to OFF position.

2. Disconnect combination meter connectors, refer

to Section 8.

3. Disconnect P/S control module connector.

4. T urn ignition switch to ON pos ition without en gine

running.

5. Measure voltage from terminal PPL wire of TCM

connector to ground.

Is voltage within 4 – 5 V?

Intermittent trouble or

faul ty ECM.

Check for intermittent,

refer to

1.7 ELECTRICAL

CIRCUIT INSPECTION

PROCEDURE -

INTERMITTENT AND

POOR CONNECTION

in Section 0A.

PPL wire open.

Poor connection of ECM

connector terminal.

If OK, substitute a known

good ECM and rec hec k.

11 Check VSS Signal Circuit.

1. Turn ignition switch to OFF position.

2. Disconnect connector from TCM.

3. Turn ignition switch to ON position without

running engine.

4. Measure voltage from terminal PPL wire of TCM

connector to ground.

Is voltage more than 4 V?

Go to Step 12. Go to Step 14.

Fig. 1 for Step 5

Fig. 2 for Step 4 and Step 6

12 Check VSS circuit for short.

1. Turn ignition switch to OFF position.

2. Disconnect connector from ECM, combination

meter and P/S control module.

3. Turn ignition switch to ON position without

running engine.

4. Measure voltage from terminal PPL wire of TCM

connector to ground.

Is voltage within 0 V?

Go to Step 13. PPL wire short ed to power

supply.

13 Check VSS Circuit.

1. Check VSS circuit, refer to DTC P0720 OUTPUT

SPEED SENSOR (VSS) CIRCUIT

MALFUNCTION in Section 7B.

Is result satisfactory?

Go to Step 14. Repair or replace VSS cir-

cuit.

14 Check VSS circuit for short.

1. Turn ignition switch to OFF position.

2. Disconnect connector from combination meter

and P/S control module.

3. Turn ignition switch to ON position without

running engine.

4. Measure voltage from terminal G59-28 of TCM

connector to ground.

Is voltage within 4 – 5 V?

Faulty speedometer of

P/S control module. PPL wire op en or sho rted to

ground. Substitute a known

good ECM and rec hec k.

Step Action Yes No

2.23 DTC P1450 BAROMETRIC PRESS URE SENSOR LOW/HIGH INPUT

WIRING DIAGRAM / CIRCUIT DESCRIPTION

Barometric pressure sensor is installed in ECM.

DTC CONFIRMATION PRO CEDURE

1. Turn ignition switch OFF.

2. Clear DTC with ignition switch ON.

3. Turn ignition switch ON for 2 sec., crank engine for 2 sec. and run it at idle for 1 min.

4. Check DTC, refer 2.4 ENGINE DIAGNOSTIC FLOW TABLE.

INSPECTION

Substitute a known-good ECM and recheck.

DTC DETECTING CONDITION POSSIBLE CAUSE

Barometric pressure: Sensor voltage is 4.7 V or

higher, or 1.6 V or lower • ECM (barometric pressure sensor) malfunction

2.24 TABLE B-1 FUEL INJECTOR CIRCUIT CHECK

WIRING DIAGRAM

Legend

INSPECTION

1. No.1 injector 3. No.3 injector

2. No.2 injector 4. No.4 injector

Step Action Yes No

1 Was ENGINE DIAG. FLOW TABLE performed? Go to Step 2. 2.4 Go to ENGINE DIAG.

FLOW TABLE.

2 Check Injector for operating sound.

Using sound scope, check each injector for oper-

ating sound at engine cranking.

Do all 4 injectors make operating sound?

Fuel injector circuit is

in good condition. Go to Step 3.

3 Does none of 4 injectors make operating sound at

Step 2? Go to Step 4. Check connection and

wire harness of injector

not making operating

sound and injector itself,

refer to Section 6E1.

4 Check power circuit of injectors for open and

short.

Is it normal?

Check all 4 injectors

for resistance respec-

tively.

If resistance is OK,

substitute a known-

good ECM and

recheck.

Power circuit open or

short.

2.25 TABLE B-2 FUEL PUMP AND CIRCUIT CHECK

WIRING DIAGRAM

Legend

INSPECTION

CAUTION:

Check to make sure that connection is made between correct terminals. Wrong con-

nection can cause damage to ECM, wire harness, etc.

1. Fuel pump relay

2. Fuel pump

Step Action Yes No

1 Was ENGINE DIAG. FLOW TABLE performed? Go to Step 2. Go to 2.4 ENGINE DIAG.

FLOW TABLE.

2 Check Fuel Pump Control System for operation. See

Fig. 1.

Is fuel pump heard to operate for 2 sec. after ignition

switch ON?

Fuel pump circuit is in

good condition. Go to Step 3.

3 Check Fuel Pump for operation.

1. Remove fuel pump relay from relay box with

ignition sw i t ch OFF.

2. Check for proper connection to relay at each

terminal.

3. If OK, using se rvice wi re, connect te rminals c an d

d of relay connector. See Fig. 2.

Is fuel pump heard to operate at ignition switch ON?

Go to Step 4. PNK, BLK or BLK/RED cir-

cuit open or fuel pump mal-

function.

4 Check Fuel Pump Relay for operation.

1. Check resistance between each two terminals of

fuel pump relay. See Fig.3.

Between terminals c and d: Infinity

Between terminals a and b: 56 – 146 Ω

2. Che c k that there is continu ity between terminal s c

and d wh en battery is connec ted to term inals a and

b. See Fig. 3.

Is fuel pump relay in good condition?

PNK circuit open or

poor C 41-19 connec-

tion.

If wire and connection

are

OK, substitute a known-

good ECM and recheck.

Replac e fuel pump

relay.

Fig. 1 for Step 2

Fig. 2 for Step 3

Fig. 3 for Step 4

2.26 TABLE B-3 FUEL PRESSURE CHECK

WIRING DIAGRAM

Legend

INSPECTION

1. In jec to r 3. F u el pum p (B): Hose

2. Delivery pipe (A): Fuel pressure gauge (C): Attachment

Step Action Yes No

1 Check Fuel Pressure, refer to Section 6E1 for

details.

1. Release fuel pressure from fuel feed line.

2. Install fuel pressure gauge.

3. Check fuel pressure by repeating ignition

switch ON and OFF. See Fig. 1.

Is fuel pressure then 270 – 310 kPa (38.4 – 44.0

psi)?

Go to Step 2. Go to Step 4.

2 Is 250 kPa (35.6 psi) or higher fuel pressure

retained for 1 minute after fuel pump is stopped at

Step 1?

Normal fuel pressure. Go to Step 3.

3 Is there fuel leakage from fuel feed line hose, pipe

or joint? Rectify fuel leakage. Faulty fuel pressure regu-

lator.

4 Was fuel pressure higher than spec. in Step 1? Faulty fuel pressure

regulator. Clogged fuel filter,

Restricted fuel feed hose

or pipe, Faulty fuel pump

or Fuel leakage from

hose conne cti on in fuel

tank.

Fig. 1 for Step 1 Legend

1. Fuel pressure gauge

2. 3 way joint

(A): Special tool SD28018 or AU338

(B): Special tool SD28057

2.27 TABLE B-4 IDLE AIR CONTROL SYSTEM CHECK

Legend

INSPECTION

1. IAC valve 2. Main relay 3. To TCM

Step Action Yes No

1 Check engine idle speed and IAC duty, refer to 2.

ON-VEHICLE SERVICE in Section 6E1.

Is idle speed within specification?

Go to Step 2. Go to Step 4.

2 Is IAC duty within specification in Step 1? Go to Step 3. Check for following:

• Vacuum leak.

• EVAP canister purge

control system.

• Clog of IAC air pas-

sage.

• Accessory engine

load, refer

2.29 TABLE B-6

ELECTRIC LOAD

SIGNAL CHECK.

• Closed throttle posi-

tion (TP sensor)

• Stuck PCV valve.

3 Is engine idle speed kept specified even with

headlights ON? System is in good

condition. Go to Step 7.

4 Was idle speed higher than specification in Step

1? Go to Step 5. Go to Step 6.

5 Check A/C (input) signal circuit, refer to Step 1 of

2.28 TABLE B-5 A/C SIGNAL CIRCUIT CHECK.

Is it in good condition?

Go to Step 7. Repair or replace A/C

signal circuit or A/C sys-

tem.

Fig. 1 for Step 6

Fig. 2 for Step 7

Table 1 for Step 6

7 Check Idle Air Control System.

1. Remove IAC valve from thro ttl e bod y, refer to 2.1

AIR INTAKE SYSTEM - IAC VALVE, REMOVAL

in Section 6E1.

2. Check IAC valve for operation, refer to 2.1 AIR

INTAKE SYSTEM - IAC VALVE, INSPECTION in

Section 6E1. See Fig.2.

Is check result satisfactory?

Intermittent trouble or

faul ty ECM.

Check for intermittent,

refer to

1.7 ELECTRICAL

CIRCUIT INSPECTION

PROCEDURE -

INTERMITTENT AND

POOR CONNECTION

in Section 0A.

Go to Step 8.

8 Check Wire Harness for Open or Short.

1. Turn igni tion swi tch O FF.

2. Disconnect IAC valve connector.

3. Check fo r proper conne cti on to I A C v al ve a t each

terminal.

4. If OK, disconnect ECM connector.

5. Check for proper connection to ECM at C42-6

terminal.

6. If OK, check BLK/RED, GRN/RED and BLK

circuit for open or short.

Are t hey in good condition?

Replace IAC valve and

recheck. Repair or replace.

Step Action Yes No

Selector lever position Voltage at C41-14

P and N range 10 – 14 V

R, D, 2 and L range 0 – 1 V

2.28 TABLE B-5 A/C SIGNAL CIRCUITS CHECK (VEHICLE WITH A/C)

Legend

1. Blower fan motor 4. A/C pressure switch 7. A/C condenser fan motor

2. Blower fan switch 5. A/C evaporator outlet air temp. sensor 8. A/C compressor relay

3. A/C switch 6. A/C condenser fan relay 9. A/C compressor

INSPECTION

NOTE:

When A/C evaporator th ermist or temp . is below 2.5°C, A/C remai ns OFF ( C41-1 terminal volt age

become 10 – 14 V). This condition is not abnormal.

Fig. 1 for Step 1

Step Action Yes No

1 Check Evaporator Temp. Sensor Resistance.

1. Disconnect ECM connectors with ignition switch

at OFF position.

2. Check resistance between G02-14 terminal and

G02-10 terminal. See Fig. 1.

Is it within specification?

At 0°C 6.3 – 6.9 kΩ

At 25°C 1.8 – 2.2 kΩ

Go to Step 2. Faulty A/C evaporator temp.

sensor or its circuit.

2 Check A/C Switch Signal.

1. Check voltage at C41-16 terminal under each

con dition given bel ow.

Ignition switch ON A/C switch OFF: 10 – 14V

Ignition switch ON A/C switch ON: 0 – 1V

Is check result satisfactory?

Go to Step 3. YEL/GRN wire open or

short.

Poor C41-16 terminal con-

nection.

If wire and connection are

OK, substitute a known-

good ECM and rec hec k.

Go to Step 3.

3 1. Check voltage at C41-1 terminal under each

con dition given bel ow.

While engine running, A/C switch OFF: 10 – 14V

While engine running, A/C switch ON: 0V

Is check result satisfactory?

A/C control system cir-

cuit s are in good cond i-

tion.

PNK/BLK wire open or

short.

Poor C41- 1 ter minal con-

nection.

If wire and connection are

OK, substitute a known-

good ECM and rec hec k.

2.29 TABLE B-6 ELECTRIC LOAD SIGNAL CIRCUIT CHECK

Legend

1. Blower fan motor 3. Position lamp

2. Blower fan switch 4. To A/C switch

INSPECTION

Fig. 1 for Step 1

Table 1 for Step 1

Step Action Yes No

1 Check Electric Load Signal Circuit.

1. Turn ignition swi tc h ON.

2. Check voltage at terminals C41-17 and G02-

13 of ECM connector while connected,

under each condition. See Fig. 1 and Table

Is each voltage as specified?

Electric load signal

circuit is in good con-

dition.

RED/YEL and/ or PNK/

BLU circuit open or short,

electric load diodes mal-

function or each electric

load circ ui t malfu nc tio n.

Ignition switch ON,

Small light and heater blower fan turned: VOLTAGE AT

C41-17 VOLTAGE AT

G02-13

OFF: 0V 10 – 14V

ON: 10 – 14V 0V

2.30 TABLE B-7 RADIATOR FAN CONTROL SYSTEM CHECK

Legend

INSPECTION

1. Radiator fan relay No.1 3. Radiator fan relay No.3

2. Radiator fan relay No.2 4. Radiator fan

Step Action Yes No

1 Check Fan Control System.

1. Connect Tech 2 to DLC with ignition swit ch OF F.

2. S t art engine an d select DAT A LIST mode on Tech

3. Warm up engine until coolant temp. is 97.5°C or

higher and A/C switch turn OFF. (If engine

coolant te mp. do es not rise , check en gine cool ing

system or ECT sensor.) See Fig. 1.

Is radiator cooling fan started when engine coolant

temp. reaches above temp.?

Radia tor co oling fan

contr ol system i s in

good condition.

Go to Step 2.

2 Check Radiator Fan Relay and its Circuit.

1. Turn igni tion swi tch O N.

2. Check voltage at terminal C41-18 of ECM

connector while connected when engine coolant

temp. is lower than 97.5°C and A/C switch turns

off: 10 – 14 V.

Is check result satisfactory?

Check for intermittent,

refer to

1.7 ELECTRICAL

CIRCIT INSPECTION

PROCEDURE -

INTERMITTENT AND

POOR CONNECTION

in Section 0A. If wire

and c o nnection OK,

substitute a known

good ECM and recheck.

Go to Step 3.

Fig. 1 for Step 1

3 Check Radiator Fan Relays.

1. Turn ignition switch OFF and remove radiator

cooling fan relays. (No.1 – No.3)

2. Check for proper connection to relay at terminals

c an d d.

3. If OK, check that there is continuity between c

and d when battery is connected to terminals a

and b. See Fig. 2.

Is check result satisfactory?

Go to Step 4. Re place radiator fa n

relay(s).

4 Check Radiator Fan.

1. Turn igni tion swi tch O FF.

2. Disconnect cooling fan motor connector.

3. Check for proper connection to motor at BLU/

RED and BLK terminals.

4. If OK, connect battery to motor and check for

operation. See Fig. 3.

Is it in good condition?

BLU/WHT, BLU/RED or

BLK circuit open. Replace radiator fan motor.

Step Action Yes No

Fig. 2 for Step 3 Legend

Fig. 3 for Step 4

1. Radiator fan No.1

2. Radiator fan No.2

3. Radiator fan No.3

3. SPECIAL TO OLS

NOTE: Refer to Section 0A GENERAL INFORMATION – 7. CONSOLIDATED TOOLS for a detailed list of

special tools and the local equivalent if one is available.

NOTE

This kit includes the following items:

1. Tool body & washer,

2. Body plug,

3. Body attachment,

4. Holder,

5. Return hose & clamp,

6. Body attachment-2 & washer,

7. Hose attachment- 1,

8. Hose attachment- 2.

SD28018 or AU338 SD28057 09912-5 842 1 09917-47010

Pressure gauge Fuel pressure gauge

hose Checking tool set

(See NOTE A.) Vacuum pump gauge

09912-57610 09930-88530

Checking tool plate Injector test lead Tech 2 kit

(see Note B)

NOTE B:

This kit includes the following items:

1. Tech 2,

2. PCMCIA card,

3. DLC cable,

4. SAE 16 / 19 adapter,

5. Cigarette cable,

6. DLC loopback adapter,

7. Battery power cable,

8. RS232 adapter,

9. RS232 loopback connector,

10. Storage case,

11. Power su ppl y.7 .