SECTION 12E – CRUISE CONTROL

CAUTION:

This vehicle will be equipped with a Supplemental Restraint System (SRS). A SRS will consist of either

seat belt pre-tensioners and a driver’s air bag, seat belt pre-tensioners and a driver’s and front

passenger’s air bags or seat belt pre-tensioners, driver’s and front passenger’s air bags and left and

right-hand side air bags. Refer to SAFETY PRECAUTIONS, Section 12M SUPPLEMENTAL RESTRAINT

SYSTEM in the VT Series I Service Information before performing any service operation on, or around

SRS components, the steering mechanism or wiring. Failure to follow the SAFETY PRECAUTIONS could

result in SRS deployment, resulting in possible personal injury or unnecessary SRS system repairs.

CAUTION:

This vehicle may be equipped with LPG (Liquefied Petroleum Gas). In the interests of safety, the LPG fuel

system should be isolated by turning 'OFF' the manual service valve and then draining the LPG service

lines, before any service work is carried out on the vehicle. Refer to the LPG leaflet included with the

Owner's Handbook for details or the appropriate Section of this Service Information CD for more specific

servicing information.

CAUTION:

Whenever any component that forms part of the ABS or ABS/ETC (if fitted), is disturbed during Service

Operations, it is vital that the complete ABS or ABS/ETC system is checked, using the procedure as

detailed in 4 DIAGNOSIS, ABS or ABS/ETC FUNCT ION CHECK, in Section 12L ABS & ABS/ETC, in either

of the VT Series I Service Inf ormation for th e V6 Engine or in the VT Series II Service Informat ion for the

GEN III V8 Engine of this Service Information CD.

1. GENERAL INFORMATION

Cruise control is a vehicle speed control system which m aintains a desired vehicle speed without the driver having

to continually apply foot pressure to the accelerator pedal.

Depending on the model variant, cruise control is available as either standard or optional equipment on all VT

Series II models with either automatic or manual transmission.

The cruise control system is the same as that fitted to previous VT Series models. It is an Electro-motor system

that is vacuum independent. The Electro-motor cruise control system uses a stepper motor to control vehicle speed.

On m odels fitted with GEN III V8 engines and trac tion control, a throttle relax er servo is f itted as part of the trac tion

control system to provide engine torque c ontrol. T he throttle relaxer m om entarily reduces the throttle opening angle

when traction loss occurs.

There is no electronic interface between the throttle relaxer and the cruise control module.

1.1 SYSTEM OPERATION

The main components of the Electro-motor cruise control system are the cruise control module, cruise control

switches (m ounted on the turn signal stalk ), brake pedal electr ical release switch, brak e pedal stop lam p switch,

clutch pedal switch (manual transmission models), cruise control cable and electrical wiring (incorporated into

the main wiring harnes s ).

The cruis e control m odule also us es an output fr om the Powertrain Control Module ( PCM) f or vehicle speed, and

an input to the Body Control Module (BCM) to send a serial data message to the instruments (cruise control

interface).

W hen the cruise control module is powered up via the cruise control ON-OFF switch, the cruise control m odule

activates an input to the BCM. The BCM sees this line as active and sends a serial data message to the

instrument c luster to turn its CRUISE lamp on.

W hen the SET-COAST switch is depressed (provided the vehicle speed is above 40 km/h and either the brake

or clutch pedal is not depressed) the cruise control module lights up the ACTIVE lamp in the instrument cluster

and in turn, informs the PCM to use a specific transmission shift pattern. This is designed primarily for cruise

mode, having fewer transmission down shifts and reduced transmission gear change activity. For further

information about the BCM cruise control interface, refer to either Section 12J-1 LOW SERIES BCM, or

Section 12J-2 HIGH SERIES BCM in the VT Ser ies II Ser vice Inf or mation.

Fig. 12E-1 illustrates the component relationship for the cruise control system.

Techline

T212E001

kmh

60 80 100120

140

160 F

180

200

220

LPG

Figure 12E-

1. Cruise control module

2. Brake pedal electrical release switch (Switch B)

3. Brake (Stop lamp) switch A

4. Throttle body

5. Cruise control switches

6. Body control module

7. Instrument cluster

8. CRUISE and ACTIVE lamps

9. Powertrain control module

10. Clutch switch

COMPONENTS

The cruise control module (1) is mounted forward

of the right-hand s trut tower (2) and adjacent to the

optional ABS module (3), regardless of the engine

variant.

T212E002

Figure 12E-2

The cruise control module functionally integrates an

electronic controller (1) with an electric stepper

motor (2).

The electronic controller monitors vehicle speed

from a signal generated by the PCM which in turn,

operates the electric stepper motor.

The stepper motor, in response to the electronic

controller, adjusts the throttle position to maintain

the desired vehicle set speed. The electronic

controller is operated by the cruise control system

control switches (3) located at the tip of the

headlamp and turn signal stalk control switch

assembly.

T212E025

Figure 12E-3

Two switches, mounted on the br ake pedal suppor t

(1), disengage the cruise control system

electronically when the brake pedal (2) is

depressed.

The upper switch (3) is the cruise control electrical

release switch (Switch B). The two rear terminals

are used for the cruise control system.

NOTE: Using the f ront set of term inals will result in

the cruise control not functioning.

The lower switch (4) is the brake pedal stop lamp

switch (Switch A), and is used to illum inate the s top

lamps and signal the cruise control module to

disengage.

With the brake pedal at rest, the stop lamp contacts

in the lower switch are open, and closed when the

brake pedal is depressed.

With the brake pedal at rest, the electrical release

contacts in the upper switch are closed, and open

when the brake pedal is depressed.

Both switches are used to signal the cruise control

module so that if one s hould fail, the sec ond switch

will still generate a signal to the cruise control

module to disengage the cruise control function.

T212E003

Figure 12E-4

For vehicles with a manual transmission, a clutch

pedal switch (1) mounted on the clutch pedal

support (2), has been incorporated into the cruise

control system. When the driver depresses the

clutch pedal (3) to change gear, the cruise control

is disengaged.

When the clutch pedal is depressed a signal is

transmitted to the cruise control module to

disengage the cruise control function.

With the clutch pedal at rest, the contacts of the

clutch switch are c losed, and open when the clutch

pedal is depressed.

T212E034

Figure 12E-5

The cruise control module comprises an electronic

controller (1) and electric stepper motor, solenoid

operated clutch and gear train assemblies (2), and

a connecting strap (3).

The electronic controller receives signals from the

cruise control electrical release switch, stop lamp

switch, clutch pedal switch and vehicle speed

output. It then generates signals to control the

stepper m otor and solenoid operated cr uise control

module clutch.

The electric stepper motor is a brushless type

motor with a four pole per manent m agnet arm ature

and three phase stator. The motor provides torque

through a mechanical gear train to a control cable,

which actuates the throttle linkage.

When the brake pedal electrical release switch is

activated (brake pedal depressed) the stepper

motor begins to spin the motor back to the zero

motor position. If the signal at pin G (refer to

Fig. 12E-39) of the cruise control module is pulled

high, it will cause the stepper motor clutch to de-

energise in about 0.75 seconds . In most c ases, the

stepper motor will be in the zero position when the

module clutch is disengaged. This time delay

period is introduced to prevent the accelerator

pedal from slapping while the throttle is still held

open. The stepper motor relies on the throttle

return spr ing to return the s tepper motor to the zero

position as the spring on the drum gear is not

strong enough to return the throttle/cruise to zero.

The internal components of the control module are

not serviceable.

CAUTION: Do not attempt to repair the control

module assembly if faulty. Unauthorised repair

of the control module will affect vehicle safety.

T212E004

Figure 12E-6

CRUISE CONTROL SWITCH OPERATION

Engaging the Cruise Control

W ith the ignition switched on, press the cruise ON-

OFF button (1). This will cause the CRUISE lamp in

the instrument cluster to illuminate, refer to

Fig. 12E-8, indicating power is on.

Accelerate the vehicle to the desired cruise speed

(above 40 km/h) and depress and release the

SET-COAST button (2), then release the

accelerator pedal.

T212E029

Figure 12E-7

The CRUISE lamp (1) in the instrument cluster will

illuminate when the cruise control system is turned

on at the control switch located on the turn signal

stalk.

The ACTIVE lamp (2) in the instrument cluster will

illuminate when the cruise control system is

engaged. The cruise speed will be automatically

ma intained, provided the vehicle speed is above 40

km/h.

T212E005

LPG

Figure 12E-8

To Change Cruise Speed

To reset the cruise control to a higher speed,

accelerate the vehicle to the desired speed,

depress the SET-COAST button (1) and release it.

Depressing the RESUME-ACC (2) button will cause

an increase in cruise speed and the vehicle will

accelerate at a controlled rate until the RESUME-

ACC button is released. The vehicle will now cruis e

at this higher set speed.

To decrease the cruise speed, press the SET-

COAST button. The vehicle will decelerate,

coasting to a slower speed at a controlled rate until

the SET-COAST button is released. The vehicle will

now continue to cruise at the reduced set speed.

NOTE: While holding the SET-COAST button, the

ACTIVE lamp in the instrument cluster (refer to

Fig. 12E-8) will turn OFF. The ACTIVE lamp will

illuminate when the SET-COAST button is

released.

The cruise control switches also provide the f acility

for TAP UP and TAP DOWN for smaller

incremental adjustments in vehicle cruise speed.

TAP UP is achieved by quickly depressing the

RESUME-ACC button and the cruise speed will

increase by 2.0 km/h for every TAP UP. Quickly

depressing the SET-COAST button (TAP DOWN)

will decrease the cruise control speed by 2.0 km/h

for every TAP DOW N. TAP DOW NS are limited to

the minimum cruising speed of 40 km/h.

T212E030

Figure 12E-9

To Override the Cruise Control System

The accelerator pedal may be depressed at any time to override the cruise control system. Release of the

accelerator pedal will return the vehicle to the previous set cruise speed.

To Disengage the Cruise Control System

The system is disengaged when:

1. The brake pedal is depressed.

2. The clutch pedal is depressed (for vehicles with manual transmission).

3. The ON-OFF button is depressed switching the cruise control system to the STANDBY mode.

IMPORTANT: W hen vehicles fitted with Electronic Trac tion Control are in a low traction situation, the cruis e control

will disengage.

When the cruise control system is disengaged, the ACTIVE lamp goes out but the CRUISE lamp remains on.

To resume the previous set cruise control memory speed after changing gear, braking, stopping, or pressing the

ON-OFF switch once, first accelerate, if required, until the vehicle speed is greater than 40 km/h, then press the

RESUME-ACC button (for less than one second). The vehicle will then automatically accelerate to the previous

cruise speed setting.

The cruise control module will retain the previous set speed in memory for as long as the CRUISE lamp is

illuminated. Depressing the clutch pedal or brake pedal, or pressing the ON-OFF switch once while the ACTIVE

lamp is on, will not erase the vehicle set speed from the control module memory.

Pressing the ON-OFF switch while only the CRUISE lamp is on or turning the ignition off, will erase the previous

cruise set speed from the control module memory.

NOTE: Each time the ignition is c ycled, the CRUISE and ACTIVE lamps will go out. T o r eac tivate the cr uis e c ontrol,

the cruise control ON-OFF switch will have to be pressed.

2. SERVICE OPERATIONS

2.1 CRUISE CONTROL CABLE

REMOVE

1. On vehicles with V6 engine, push the outer

cable retaining tang (1) at the throttle cable

bracket (2) away from the throttle body and

pull outer cable (3) out of throttle cable

bracket.

2. On vehicles with V6 engine, remove the inner

cable retaining clip (4) from the throttle body

linkage lever stud by pushing the retaining c lip

off the stud with the aid of a screwdriver.

T212E006

Figure 12E-10

3. On vehicles with GEN III V8 engine and

without traction control, remove four dome

nuts (2) securing engine dress cover

assem bly (1) to intake m anifold studs. Lift and

remove dress cover assembly.

T26D3105

Figure 12E-11

4. On vehicles with GEN III V8 engine and

without traction control, use a screwdriver to

prise end of c ruise control inner cable (1) f rom

throttle body lever stud (2). Lever outer cable

retaining tang (3) at cable mounting bracket

(4) and pull outer cable (5) upwards from

cable mounting bracket.

T212E037

Figure 12E-12

5. On vehicles with GEN III V8 engine and

traction control, remove cover (1) from throttle

relaxer (2) by depressing tabs (3) on both

sides of cover. Refer to Fig. 12E-13 and

Fig. 12E-22.

T212E038

Figure 12E-13

6. Rotate top cam (1) of throttle relaxer (2) and

rem ove ferr ule ( 3) of cr uise control inner cable

from locating slot (4) in throttle c am. Lever out

retaining tang of outer cable (5) then lift cable

away from throttle relaxer mounting

bracket (6).

T212E039

Figure 12E-14

7. At the control module (1), turn the outer

control cable (2) towards the engine (approx.

45°) to release the cable lock mechanism (3)

from the control module.

T212E009

3 1

Figure 12E-15

8. Pull the outer cable (1) from control module (2)

and disconnect inner cable (3) from electric

stepper m otor str ap end fitting (4) by lifting the

cable upward, approximately 45°, allowing it to

be released from the end fitting.

T212E010

Figure 12E-16

9. Release cruise control cable from main wiring

harness/cable clip (1) by holding the upper

retention clip (2) and then pushing the lower

retention clip (3) inward and down to release

the powertrain wiring harness (4), throttle

cable (5), cruise control cable (6), and for

wagon only, the rear washer hose (7).

NOTE: Depending on m odel and har ness /c able c lip

location, clip may also retain accelerator pedal

cable and wiper motor harness.

10. Remove cruise control cable.

T212E011

Figure 12E-17

REINSTALL

1. Ensuring that the motor strap (1) is not

twisted, attach inner cable end ( 2) to the motor

strap end fitting (3) at the control module (4).

T212E012

432

Figure 12E-18

2. W hile holding the inner cable (1) at the throttle

body linkage lever stud connection end, slide

outer cable (2) over the motor strap until the

outer cable sits flush with the control module

housing (3).

3. Turn outer c able towards the r ight-hand f ender

(approx. 45°) to lock the outer cable locking

mechanism to the control module, refer to

Fig. 12E-19.

4. Ensuring that the cr uise contr ol cable is r outed

correctly, lock the cable into the main wiring

harness/c able clips. Ref er to Fig. 12E-20 (V6),

Fig. 12E-21 and Fig. 12E-22 (GEN III V8).

T212E013

Figure 12E-19

CABLE ROUTING: V6 engine

T212E014

123

589

A-A

B-B

Figure 12E-20

1. Cruise control cable

2. Throttle cable

3. Cruise control module

4. Powertrain wiring harness

5. Harness/cable clip (Section A-A)

6. Wiper motor harness

7. Rear washer hose (W agon only)

8. Harness/cable clip (Section B-B, three places)

9. Cruise control outer cable adjuster/lock

10. Throttle cable bracket

NOTE: Cruise control cable routing for V6 Supercharged

engine is the same.

CABLE ROUTING: GEN III V8 engine without throttle relaxer

T212E035

A-A

Figure 12E-21

1. Cruise control module

2. Cruise control cable

3. Throttle cable bracket

4. Throttle cable

5. Powertrain harness

6. Wiper motor harness

7. Harness/cable clip (Section A-A)

8. Rear washer hose (W agon only)

9. Throttle outer cable adjuster/lock

10. Cruise control outer cable adjuster/lock

CABLE ROUTING: GEN III V8 engine with throttle relaxer

T212E036

A-A

B-B C-C

Figure 12E-22

1. Cruise control module

2. Cruise control cable

3. Accelerator pedal cable

4. Powertrain harness

5. Wiper motor harness

6. Harness/cable clip (Section A-A)

7. Rear washer hose (W agon only)

8. Throttle cable bracket

9. Throttle outer cable adjuster/lock

10. Throttle cable

11. Harness /cable clip (Section B-B)

12. Cruise control outer cable adjuster/lock

13. Harness/cable clip (Section C-C)

14. Throttle relaxer

15. Throttle relaxer cover

5. Unlock the c r uise c ontr ol outer c able by pulling

the lock tangs on the outer cable adjus ter/lock

(1) in the direction indicated by the arrows in

Fig. 12E-23.

T212E016

Figure 12E-23

6. On vehicles with V6 engine, push the outer

cable retainer (1) into the throttle cable brac k et

(2).

7. On vehicles with V6 engine, push the inner

cable retaining clip (3) onto the throttle body

linkage lever stud (4).

T212E031

Figure 12E-24

8. On vehicles with V6 engine, adjust the cruise

control outer cable (1) at the cable

adjuster/lock (refer to Fig. 12E-23) to achieve

minimum slack of the inner cable (2) while

ensuring that the throttle lever (3) is in the fully

closed position (4). Refer to Fig. 12E-25.

T212E020

Figure 12E-25

9. On vehicles with GEN III V8 engine without

traction control push the inner cable retainer

clip (1) onto throttle body linkage lever stud

(2). Push outer cable retainer (3) into throttle

cable bracket (4) ensuring that the cable

retaining tang (5) locks into throttle cable

bracket.

T212E041

Figure 12E-26

10. On vehicles with GEN III V8 engine and

traction control, rotate top cam (1) of throttle

relaxer (2) and install inner cable ferrule (3)

into slot in cam (4). Ensure that inner cable is

properly in groove on cam. Push outer cable

retainer (5) onto throttle relaxer mounting

bracket (6) ensuring that the cable retaining

tang locks into the mounting bracket.

T212E039

Figure 12E-27

11. On vehicles with GEN III V8 engine and

traction control, install cover (1) on throttle

relaxer (2).

T212E042

Figure 12E-28

12. Allow the internal spring of the cable

adjuster/lock mechanism (1) to take up the

free play of the outer cable (2). Push down on

the outer cable lock ing retainer to fix the outer

cable to the corr ect self adjusted length. Refer

to Fig. 12E-29.

NOTE: After the cable is fitted, ensure that the

throttle opens without binding and returns to the

fully closed position under throttle return spring

tension.

13. On vehicles with GEN III V8 engine without

traction control, install the engine cover.

T212E021

Figure 12E-29

2.2 CRUISE CONTROL MODULE

REMOVE

1. Remove the cruise control cable, refer to

2.1 CRUISE CONTROL CABLE in this

Section.

2. Pull up tang on wiring harness connector (1),

and pull connector from control module (2).

3. Remove the three screws (3) securing the

control module to the ABS/cruise control

module mounting bracket (4) and remove

control module.

T212E022

2 ~ 5 Nm

Figure 12E-30

REINSTALL

Installation of the cruise control module is the

reverse of the removal operation, noting the

following:

1. To install the cruise control cable, refer to

2.1 CRUISE CONTROL CABLE in this

Section.

2. Tighten all fasteners to the correct torque

specification.

3. Connect the wiring harness connector

ensuring that the connector tang is secure.

CONTROL MODULE

SECURING SCREW

TORQUE SPECIFICATION 2 – 5 Nm

2.3 CRUISE CONTROL SWITCH ASSEMBLY

REMOVE AND REINSTALL

The cruise control switches are integrated with the

headlamp and turn signal control switch stalk

located to the right of the steering column.

Removal and installation instructions for the right-

hand switch stalk are described in Section 12B

LIGHTING SYSTEM in the VT Series I Service

Information.

CHECKING SWITCH CONTACTS

With the cruise control system control switch lead

disconnected from the main wiring harness, check

the cruise control switch contacts as follows:

Attach an ohmmeter to the appropriate terminals

nominated in the following chart and depress and

hold switches as indicated.

T212E033

Figure 12E-31

SWITCH OHMMETER CONNECTED RESISTANCE RESISTANCE

BETWEEN SWITCH DEPRESSED SWITCH RELEASED

ON-OFF RED wire & GREY wire Approximatel y 470 ΩOpen Ci rcuit

SET-COAST BLUE wire & RED wire Approximatel y 470 ΩOpen Ci rcuit

RESUME-A CC RED wire & GREEN wire Approximatel y 470 ΩOpen Ci rcuit

If the resistance is not to specification, replace the

cruise control switch assembly.

2.4 STOP LAMP SWITCH(SWITCH A)

TESTING SWITCH CONTACTS

1. Check adjustment of the stop lam p switch (1),

refer to the following switch installation and

adjustment proc edure and adj us t the switch as

required.

Ensure that the stop lamps are operating when

the brake pedal is depressed.

If stop lamps are not operating, repair as

necessary, refer to Section 12B LIGHTING

SYSTEM in the VT Series I Service

Information.

2. Remove wiring harnes s c onnec tor (2) f r om the

terminals of the stop lamp switch (1).

3. Connect an ohmmeter across the switch

terminals and the ohmmeter should indicate

open circuit with the brake pedal at rest.

Depress the brake pedal and the ohmmeter

should indicate continuity.

4. Replace the switch as per the following

removal procedure if the tests prove the switch

to be faulty.

5. If the test proves the switch to be serviceable,

connect the wiring harness connector to the

switch.

T212E045

Figure 12E-32

REMOVE

1. Disconnect wiring harness c onnec tors (2) f r om

the stop lamp switch (1).

2. Rotate switch anticlockwise and remove from

the mounting nut (3).

REINSTALL AND ADJUST

1. Install the stop lamp switch (1) into the

mounting nut (2) on the brake pedal support

(3).

2. With the brake pedal (4) in its rest position,

adjust the switch to the clearance dimension

shown in Fig. 12E-33.

3. Connect wiring harness connector to the

switch.

T212E046

6 0.5mm

A-A

Figure 12E-33

2.5 ELECTRICAL RELEASE S WITCH (SWITCH B)

TESTING SWITCH CONTACTS

1. Check adjustment of the electrical release

switch (1), refer to the following switch

installation and adjustment procedure and

adjust the switch as required.

2. Remove wiring harness connector from rear

most terminals (2) of switch.

3. Connect an ohmmeter across the switch

terminals and the ohmmeter should indicate

continuity with the brake pedal at rest.

Depress the brake pedal and the ohmmeter

should indicate an open circuit.

4. Replace the switch as per the following

removal procedure if the tests prove the switch

to be faulty.

5. If the test proves the switch to be serviceable,

connect the wiring harness connector to the

switch.

T212E023

Figure 12E-34

REMOVE

1. Disconnect wiring harness c onnec tors (1) f r om

electrical release switch (2).

2. Pull switch from tubular clip (3).

3. If necessary, remove clip from brake pedal

support (4).

T212E024

Figure 12E-35

REINSTALL AND A DJUST

1. If removed, install the tubular clip into the

mounting hole of the brake pedal support.

2. Holding the brake pedal in its depressed

position, install switch into tubular clip. Push

switch forward until the switch body locates in

the clip.

NOTE: Audible click s will be heard as the threaded

portion of switch assembly is pushed into the

tubular clip toward the brake pedal.

Pull brake pedal fully against pedal stop until

audible ‘click’ sounds can no longer be heard.

(Switch assembly is pushed back out from the clip

to provide correct switch position adjustment).

Depress the brake pedal again and repeat above

procedure to ensure that the switch adjustment is

correct (no click sounds).

3. Connect wiring harness connector to the

switch.

2.6 CLUTCH PE DAL SWITCH

TESTING SWITCH CONTACTS

1. Remove wiring harness connector from

terminals of clutch switch.

2. Connect an ohmmeter across the switch

term inals (1) and the ohm m eter should indic ate

continuity with the clutch pedal at rest.

Depress the clutch pedal and the ohm meter should

indicate an open circuit.

3. Replace the switch as per the following

removal procedure if the tests prove the switch

to be faulty.

4. If the test proves the switch to be serviceable,

connect the wiring harness connector to the

switch.

T212E040

Figure 12E-36

REMOVE

1. Disconnect wiring harness connectors from

switch.

2. T urn switch 90°, then pull switch ass embly out

from pedal support to remove.

REINSTALL AND A DJUST

1. Install new switch by pushing the switch

assembly through pedal support and turning

switch 90°.

2. Hold clutch pedal at its rest position.

3. Connect wiring harness connectors to clutch

switch.

4. Verify the operation of clutch switch by

operating cruise control and checking that

clutch switch stops operation of cruise control

when the clutch pedal is depressed.

3. DIAGNOSIS

3.1 PRELIMINARY DIAGNOSIS AND INSPECTION

NOTE: If a vehicle is fitted with traction control, the cruise contr ol system will disengage or f ail to engage whenever

the LOW TRAC lamp is illuminated in the instr ument c luster , and will not engage or re- engage until the LO W TRAC

lamp turns off.

When a vehicle is suspec ted of having a c ruise c ontrol system operation m alf unction, it is impor tant to carr y out the

following preliminary diagnosis. This diagnosis should be used to determine whether the cruise control system

problem is the result of an actual system defect, or the result of a problem with some other vehicle component.

Also, som e c ruise c ontrol system c om plaints m ay be a misunder standing by the driver about how the cr uise control

system f unctions . In that c ase, the oper ation of the s ystem s hould be ex plained in a manner the dr iver under stands .

A practical demonstration is very useful to explain system operation.

If it is decided the cruise control system is at fault, perform a visual inspection of all components in the system.

Cruise control system malfunctions can be caused by mechanical, electrical, or a combination of both problems.

Things to check are:

1. Switch inputs to cruise control module.

2. Dirty, corroded, or loose electrical connections.

3. Damaged or incorrectly adjusted stop lamp switch (Switch A). Refer to 2.4 STOP LAMP SWITCH in this

Section for test and adjustment procedure.

4. Damaged or incorrectly adjusted electrical release switch (Switch B). Refer to 2.5 ELECTRCAL RELEASE

SWITCH in this Section for test and adjustment procedure.

5. Damaged or inoperative clutch pedal switch. Refer to 2.6 CLUTCH PEDAL SWITCH in this Section for test

and adjustment procedure.

6. Binding or sticking throttle linkage.

7. Broken components (e.g. cruise control cable).

8. Bare, broken or disconnected wires.

9. Adjustment of control cable, refer to 2.1 CRUISE CONTROL CA BLE in this Section.

10. On vehicles fitted with GEN III V8 engine and traction control, ensure that the throttle relaxer is functioning

correctly. Refer to Section 12L ABS & ABS/ETC of the VT Series II Service Information.

If preliminary inspection reveals no problem, and the system is malfunctioning, refer to

3.3 SELF DIAGNOSTIC TEST in this Section.

NOTE: Verify that the problem exists before attempting any repairs. Sometimes normal operating characteristics

may be misunderstood as a problem.

Techline

3.2 CRUISE CONTROL SYSTEM FUNCTIONAL CHECK

The following procedur e should be used to c heck the operating m odes of the c ruise c ontrol system. T his procedure

should always be used after repair work has been completed on the cruise control system.

ROAD TEST PROCEDURE

1. Check ON-OFF activation: Ignition on, depress the cruise control ON-OFF button to turn the system on;

system CRUISE lamp should illuminate.

2. Check the low speed inhibit: Drive vehicle at 30 km/h. Depress SET-COAST button and release. Cruise

control must not engage and only the CRUISE lamp should be illuminated.

3. Check set speed: Drive vehicle at a steady speed of 60 km/h. Depress SET-COAST button and release.

Cruise control should engage at approximately 60 km/h and both the CRUISE and ACTIVE lamps must

illuminate.

4. Check brake release: With cruise control system engaged, depress brake pedal. The cruise control must

release the throttle, allowing vehicle speed to drop. The system must not re-engage when the brake pedal is

released. The ACTIVE lamp must go out but the CRUISE lamp will remain on.

5. Check clutch release: With cruise control system engaged, depress clutch pedal. The cruise control must

release the throttle, allowing vehicle speed to drop. The system must not re-engage when the clutch pedal is

released. The ACTIVE lamp must go out but the CRUISE lamp will remain on.

6. Check resume featu re: W ith vehicle speed at approximately 50 k m/h, depr ess the RESUME-ACC button and

release. The vehicle should accelerate to approximately 60 km/h and the CRUISE and ACTIVE lamp should

illuminate again.

7. Check coast feature: Depress the SET-COAST button and hold. Only the ACTIVE lamp must go out. Allow

the vehicle speed to drop to 50 km/h and release SET-COAST button. The cruise control should hold the

vehicle speed at approximately 50 km/h and both the ACTIVE and CRUISE lamps should be illuminated.

8. Check accelerator feature: Depress the RESUME-ACC button and hold. The vehicle speed should begin to

increase. Allow the speed to increase to 60 km/h and release switch. The cruise control should hold the vehicle

speed at approximately 60 km/h. Both the ACTIVE and CRUISE lamps should be illuminated.

9. Check coast down mode:

a) Press and r elease the ON-OFF button. T he vehicle should begin to slow down (this has the same effect

as holding the SET -COAST button). In this m ode, the cruise is deactivated and allows the vehicle to slow

down but the CRUISE lamp remains illuminated. Allow the vehicle to slow to approximately 50 k m/h then

press and release the RESUME- ACC button. The vehicle m ust return to approxim ately 60 k m/h and both

the CRUISE and ACTIVE lamps should be illuminated.

b) Press and release the ON-OFF button and allow vehicle to slow to approximately 50 km/h again and

press the SET-COAST button. The vehicle speed must hold at 50 km/h and both the CRUISE and

ACTIVE lamps should be illuminated.

c) Press the ON-OFF button again and allow the vehicle to coast down. Only the CRUISE lamp should be

illuminated.

d) Press the ON-OFF button again while in coast down m ode (Step c) to f ully turn the cr uise control s ystem

off. Both the CRUISE and ACTIVE lamps must go out.

3.3 SELF DIAGNOSTIC TEST

To provide a means of checking brake switches, clutch switch, cruise release switch, speed sensor inputs and

electro-motor operation, the cruise control system incorporates a self diagnostic facility.

Following the Self Diagnostic Test is a detailed Diagnostic Chart to pin point the cause of a cruise control system

malfunction. Refer to 3.5 CRUISE CONTROL SYSTEM DIAGNOSTIC CHART in this Section.

Carry out the Self Diagnostic Test as outlined.

Jack up vehicle and support on safety stands. Refer to Section 0A GENERAL INFORMATION in the VT Series I

Service Information for the location of jacking points. Ensure drive shafts are horizontal.

Follow Steps 1 – 23 in the SW IT CH DIAGNOSTIC T EST CHART following and perform the function as requested.

If at any stage during this test the system does not function as nom inated (CRUISE or ACTIVE lam p illumination),

repair fault as necessary.

NOTE: If at any tim e during Steps 1 – 23 of the diagnostic tes t the ignition is switched of f, the cruis e control s ystem

will exit diagnostic mode and return to normal operating conditions.

SWITCH DIAGNOSTIC TEST CHART

STEP PROCEDURE LAMPS COMMENTS

CRUISE ACTIVE

1. Turn ignition OFF OFF OFF Clears m emory of any pre-s et speed.

2. Press & Hold

ON-OFF button OFF OFF Triggers di agnostic test. ON-OFF but ton mus t be held until Step 13.

3. Turn ignit ion ON ON OFF

4. Wait 5 s econds ON OFF Waits for LOW TRAC warning lamp to switch OFF (if f i tted).

5. Press & hol d

SET-COAST button ON ON Tests SET-COAST function of cruise control switch assembly.

6. Release

SET-COAST button ON OFF

7. Press & hol d

RESUME-ACC

button

ON ON Checks RESUME-ACC function of cruise control switch assembly.

8. Release

RESUME- ACC

button

ON OFF

9. Press & hol d brake

pedal ON ON Checks cruise control electrical release switch (switch B).

10. Release brake pedal ON OFF

11. Press & hol d clutc h

pedal (man. trans. )

brake pedal (auto.

trans.)

ON ON This St ep i s included for vehicles with manual transmiss i on. If the vehi cle

is fi t ted with autom atic t ransmi ssion, then the brake pedal must be

pressed and released to enable t he c omplet i on of the switc h di agnostic

test.

12. Release clutch pedal

(man. t rans.) brake

pedal (auto. t rans.)

ON OFF

13. Release ON-OFF

button ON ON Enters the second stage of t he di agnostic mode to c heck the ON-OFF

switch and c rui se control warning lamps.

14. Press & hol d

ON-OFF button OFF OFF

15. Press & hol d brake

pedal OFF ON Checks stop lamp switch (switch A) and cruise c ontrol switc h i nputs to

cruise control module. I f not functioning, repai r as neces sary.

16. Release brake pedal OFF OFF

17. Press & hol d brake

pedal OFF ON

18. Release brake pedal OFF OFF

19. Release ON-OFF

button OFF ON Ent ers final stage of di agnostic mode, al l owing vehic l e to be road test ed

without having to hold cruise c ontrol func tion buttons.

20. Press & hol d brake

pedal

After motor stroki ng

OFF

Checks stepper motor and cable operat i on.

Stepper motor will stroke and ret urn to rest (c losed thrott le) state. If not

funct i oni ng, repai r as neces sary.

21 Hold brake pedal &

start engi ne OFF X ACTIVE lamp can be either ON or OFF.

22. Select DRIVE, dri ve

vehicle & monit or

ACTIVE lamp

OFF FLASH ACTIVE lamp will flash with vehicle speed si gnal.

Checks speed sender input to cruis e control module. I f not func tioning as

specified, replace cruis e control module.

23. Select P ARK (auto.

trans.) & switch

engine OFF

OFF OFF Ends di agnostic mode. Ret urns cruise control t o normal operati ng

conditions.

3.4 CRUISE CONTROL SYSTEM CONNECTORS & CIRCUIT DIAGRAM

(120)

(200)

(117)

BLU

(15)

LBL U

(14)

BLU/R

(20)

(9)

O/ Y

(1240)

(24)

O/ B

(540)

BLU/O

(46)

BR/ B

(199)

Y/ BLU

(116)

BLU/B

(1 15)

V/ R

(192)

YB39

BODY HARNESS CONNECTOR

FGHJK

EDCB

BLU/R

(20)

(139)

(150)

(86)

V/ W

(85)

(123)

GY/ G

BLU

(397)

(84)

(83)

GY/ B

(87)

YE56

CRUISE CONTROL

CONNECTOR

B66

I NSTRUM ENTS CONN ECTOR

20 1

B/ Y

(155)

(8)

BR/ W

(19)

BLU/Y

(10)

(30)

V/ W

(123)

BR/ O

(33)

(25)

V/ R

(234)

(85)

BLU

(15)

Y/ R

(88)

G/ W

(122 0)

BLU/ B

(946)

LBL U

(14)

(875)

O/ Y

(1340)

P/ BLU

(44)

BR/ R

(121)

T212E027

116

B/O

Y/ R

B/W

BR/ R

R/ W

(154)

(23)

(150)

(88)

(875)

(1427)

(121)

(1429)

BLU

(883)

(882)

(873)

(872)

(833)

(830)

(885)

(884)

G/ W

BLU/B

O/ W

BLU/R

(1220)

(863)

(1426)

(20)

(855)

YE98

A.B.S. OR A.B.S./ E.T.C. CONTROL

MODULE & MODULATOR

CONNECTOR

(86)

Y/ R

(88)

B12

STOP LAMPS SWITCH B

CONNECTOR

YB161

STOP LA MPS SWI TCH A

CONNECTOR

BLU/R

(20)

O/ BLU

(640)

P/ BL U

(44)

BR/ W

(19)

B87

E.C.C. C ONNECT OR

(8 )

B/ Y

(155)

B/ R

(292)

(51)

B/ R

(64)

Y/ B

(52)

G/ W

(1220)

LG/ B

(735)

BLU/B

(734)

GY/ B

(87)

GY/ G

(397)

BLU

(84)

(139)

YB152

CRUISE CONTROL S WITCH

CONNECTOR

B44

IGNITION SWITCH

CONNECTOR

(2)

(5)

(3)

(4)

Figure 12E-37

B/G

(151)

B/R

(1144)

P/B

(39)

(8)

B164

B.C.M CONNECTOR D(3)

(LOW SERIES )

(53)

G/W

(1220)

R/B

(1221)

(266)

BR /G

(271)

V/R

(229)

W/G

(1220)

(1150)

GY/R

(1391)

(83)

R/W

(248)

BLU/W

(97)

(291)

W/BLU

(494)

LBLU

(94)

T212E043

Y/R

O/BLU

GY/R

P/B

(143)

(43)

(640)

(1391)

(39) 20

Y/B

(260)

B/R

(1144)

R/W

(261)

21 12

W/BLU

(494)

LBLU

(161)

(160)

13 6

GY /B

(96)

B/LG

(556)

W/G

R/B

V/R

BR /G

G/W

Y/B

W/R

(1220)

(1221)

(229)

(271)

(266)

(1220)

(272)

(717)

(308)

YB175

B.C.M CONN ECTOR E(3)

(HIGH SERIES )

(1150)

BLU/W

(97)

(83)

LBLU

(94)

O/W

(840)

YB193

V6 P.C.M CONNECTOR (1)

GY/B

V/B

G/W

W/R

O/W

(430)

(1412)

(1413)

(412)

(413)

(418)

(897)

(815)

(1426)

C16

D16 D1

(423)

T/B

(424)

(832)

LBLU/B

(647)

LG/W

(443)

LG/B

(444)

LBLU/B

(442)

LBLU

(441)

BLU/W

(831)

B/R

(453)

(630)

BR/W

(792)

GY/R

(422)

(1222)

Y/B

(1223)

G/Y

(428)

V/W

(123)

(173)

(90)

O/B

(473)

(196)

B/G

(151)

O/V

(440)

LBLU

(14)

O/B

(740)

BL U

(15)

(782)

YB174

B.C. M . CONN ECTO R B(2)

(HIGH SERIES)

(8)

B/W

(1128)

B/Y

(28)

GY/BLU

(492)

B/Y

(155)

O/B

(740)

LBLU

(263)

YB176

B.C.M. CONNECTOR A(4)

(HIGH SERIES)

YE110

ENGINE CONNECTOR (1)

BLU/W

(304)

O/W

(1426)

P/BLU

(339)

G/W

(465)

V/W

(123)

B/W

(1427)

(1049)

E114

L OCATIO N E3 EA R TH CONNECTO R

B/G

(151)

B/W

(152)

(150)

B/Y

(155)

B/R

(157)

B/R

(157)

E123

GEN III V8 P.C.M CONNECTOR (2)

GY /B

(1687)

(975)

B/R

(750)

B/R

(750)

(832)

G/O

(469)

BR /W

(331)

Y/B

(1223)

LBLU/B

(442)

G/W

(465)

(432)

(971)

BR/Y

(1224)

B/Y

(1227)

BLU

(973)

(418)

W/B

(631)

BL U/W

(831)

(958)

(838)

LBLU

(441)

(121)

BR/W

(792)

(977)

LBLU

(978)

V/W

(123)

LG/W

(443)

(1228)

G/Y

(428)

BL U

(417)

(959)

LG/B

(366)

G/B

(259)

(974)

(976)

Y/B

(972)

(1222)

LG/B

(444)

GY /BLU

(1229)

BLU/W

(304)

(472)

(773)

GY/R

(422)

(59)

RED J2

41 80

140

(78)

Y/R

(88)

YB65

STOP LAMPS SWITCH B

CONNECTOR

B69

CLUTCH SWITCH

CONNECTOR

(78)

(86)

Figure 12E-38

T212E026

FJ R(2)

BATTERY

FQ R(2)

YB176

YE114 YE114

LOC.E3

GD B F C H A J K

IGN

N/ C SET /

COAST IGNITION

CRUISE CONTRO L MODULE

RESUME /

ACC CRUISE

ON ON / OFF

N/ O

CUTOUT

SWITCHES

BLU/R (20)

BR (86 )

YB87

YB39

ELECTRONIC

CLIMATE

CONTROL

STOP

LAMPS

LOC.E3

ELECTRONIC

GROUND POWER

GROUND

YB176 YB174

110

5YB175

YE129

Y/ R (88)

YB161

STOP

LAMPS

SWITCH A

STOP

LAMPS

SWITCH B

STOP LAMP S

SWITCH B

CLUTCH

SWITCH

YB12

YB161 YB12

YE122 YE123

YE110

YB193

V/ W (123)

POWERTRAIN

CON T ROL MODULE

J1-33

POWERTRAIN

CON TROL M ODULE

GEN III V8

J2-50

P ( 139)

G/ W (1220)

GY (83)

G/ W (1220) G/ W (1220) G/ W 12

DIMMER

SDI

CRUIS E

ACTIVE

CRUISE

SPEEDO

V/ W (123)

INSTRUMENTS

V/ W

YE56

YE56 B (15 0 ) YE114 LOC.E3

GY/ B (87)

YB175 YB164

BODY CONTROL

MODULE BODY CONTROL

MODULE

CRUISE ON

LOW SERIES

BLU (84)

BODY

CONTROL

MODULE

(HI GH SERIES)

STOP FU SE SEN SE

F15

P (3)

YB66 YB66

INSTRUMENTS

YB65

YB69

YE98

YB152 P

GY/ G

SWITCH

CRUIS E CONT ROL

ON / OFF

R/ A

S/ C

GY/ B

BLU BLU

TRACTION ON

A.B.S. OR

.B.S. / E.T.C.

MODULE

G/ W (1220)

BLU/R (20) 12V

YB65

YB69

YB12

BR (86)

BR (86 )

Y/ R (88) V/ W (78) P (139)

(FOR MANUAL

TRANS.)

YB12

TRACTION

OFF

LOW

TRACTION

F31

ENGINE

12V BUS

(1040)

O/ B 740

(155)

(151)

B/ Y

B/ G

BLU/ R (20)

BR (86)

BLU (84)

P (139)

GY/ B (87)

GY (83)

GY/ G (397)

W (85)

YB66

V/ W (123)

GY (83)

GY/ G (397)

G/ W (1220)

O/ BLU (640)

Y/ R (88)

(FOR AUTO T RANS) Y/ R (88)

SD1

LOC. E1

YB44

IGNITION SWITCH

YB44

F13 PP/ BLU (44)

30 OFF/ ON

LOCK

ACC.

IGN.

START

15A1550

CRUISE ON

HIGH SERIES

SERIAL DATA

Figure 12E-39

3.5 CRUISE CONTROL S YSTEM DIAGNOSTIC CHART

When using the following diagnostic chart, ref er also to the c ruise c ontrol system circuit diagr am and connector s on

the previous pages.

Test Description:

The numbers below refer to Step numbers in the diagnostic chart for the cruise control system.

1. Checks ignition supply to control module.

2. Checks for earth circuit to control module.

3. Checks circuits 84 and 87.

4. Checks if fault is in circuits 84 and 87, or with control module.

5. Checks RESUME-ACC function on cruise control switch assembly.

6. Checks for ignition supply to cruise control switch.

7. Checks RESUME-ACC function of cruise control switch.

8. Checks power supply to cruise control module at SET-COAST input.

9. Checks SET-COAST function of cruise control switch.

10. Determines if fault is with serial data communication (including BCM) or with stop lamp switch inputs.

11. Checks cruise control interface (serial data).

12. Checks circuit 83 for open circuit.

13. Checks for faulty stop lamp switch (switch A).

14. Checks for faulty electrical release switch (stop lamp switch B) and clutch switch.

15. Checks operation of ACTIVE lamp.

16. Determines if fault is in circuit 85 or in instrument cluster.

17. Checks for fault in circuit 123 and/or PCM.

18. Checks operation of cruise control system during road test.

19. Visual checks of cruise control cable for damage and adjustment.

20. Further diagnostic test that can be performed to help isolate any malfunctions within the system.

CRUISE CONTROL SYSTEM DIA GNOSTIC CHART

STEP ACTION VALUE YES NO

1. • Ignition OFF.

• Disconnect connector YE56 from cruise control

module.

• Ignition ON.

• Measure voltage between terminal F, circuit 139

(Pink wire) and a good earth.

• Is voltage as specified?

Approximately

12 Volts Go to Step 2. Check and repair

open in circuit

139 between

(and including)

fuse F15 and

connector YE56,

recheck and

verify repair.

2. • Ignition OFF.

• With connector YE56 still disconnected from control

module, check for continuity between control

module connector YE56, terminal E, circuit 150

(Black wire) and earth location E3.

• Does continuity exist?

Go to Step 3. Check and repair

open in circuit

150, recheck and

verify repair.

3. • Ignition ON.

• Measure voltage at connector YE56, terminal B,

circuit 84 (Blue wire) and terminal C, circuit 87

(Grey/Black wire) to earth.

• Is voltage as specified at either terminal?

Less than

1 Volt Go to Step 5. Go to Step 4.

4. • Ignition ON.

• Disconnect cruise control switch assembly

connector YB152 and measure voltage at terminals

B and C to earth on connector YE56 again.

• Is voltage as specified at either terminal?

Less than

1 Volt Replace cruise

control switch

assembly, refer

to 2.3 CRUISE

CONTROL

SWITCH in this

Section.

Check and repair

short to voltage

in circuit 84

and/or 87,

recheck and

verify repair.

5. • Ignition ON.

• Press and hold RESUME-ACC button on cruise

control switch assembly.

• Measure voltage between connector YE56, terminal

C, circuit 87 (Grey/Black wire) and earth.

• Is voltage as specified?

Greater than

9 Volts Go to Step 8. Go to Step 6.

6. • Ignition OFF.

• Disconnect cruise control switch assembly

connector YB152.

• Ignition ON.

• Measure voltage between connector YB152, circuit

139 (Pink wire) and earth.

• Does voltage exist?

Approximately

12 Volts Go to Step 7. Check and repair

open in circuit

139 between

(and including)

fuse F15 and

connector

YB152, recheck

and verify repair.

7. • Ignition OFF.

• Disconnect cruise control switch assembly

connector YB152.

• Press and hold the RESUME-ACC button and

check for continuity between Red and Green

terminals on cruise control switch assembly.

• Is resistance as specified?

Approximately

470 Ohms Check and repair

open in circuit

87, recheck and

verify repair.

Replace cruise

control switch

assembly, refer

to 2.3 CRUISE

CONTROL

SWITCH in this

Section.

8. • Ignition ON.

• Connect cruise control switch assembly connector

YB 152.

• Press and hold SET-COAST button on cruise

control switch assembly.

• Measure voltage between connector YE56, terminal

B, circuit 84 (Blue wire) and a good earth.

• Is voltage as specified?

Greater than

9 Volts Go to Step 10. Go to Step 9.

9. • Ignition OFF.

• Disconnect cruise control switch assembly

connector YB152.

• Press and hold the SET-COAST button and check

for continuity between Red and Blue terminals on

cruise control switch assembly.

• Is resistance as specified?

Approximately

470 Ohms Check and repair

open in circuit

84, recheck and

verify repair.

Replace cruise

control switch

assembly, refer

to 2.3 CRUISE

CONTROL

SWITCH in this

Section.

STEP ACTION VALUE YES NO

10. • Ignition OFF.

• Connect cruise control switch connector YB152 and

cruise control module connector YE56.

• Ignition ON.

• Repeatedly press the cruise ON-OFF button.

• Does the CRUISE lamp i n the instrument clus te r

toggle between on and off with switch operating?

Go to Step 13. Go to Step 11.

11. • Ignition ON.

• Back probe BCM connector YB175 (high series

BCM), terminal 26 or YB164 (low series BCM),

terminal 8,

circuit 83 (Grey wire) with a voltmeter to earth.

• Repeatedly press the cruise ON-OFF button again.

• Does the voltage vary as specified?

Switch

pressed:

approximately

12 Volts

Switch

released:

approximately

7 Volts

Go to CRUISE

CONTROL

INTERFACE

DIAGNOSIS in

Section 12J-1

LOW SERIES

BCM or 12J-2

HIGH SERIES

BCM in the VT

Series II Service

Information.

Go to Step 12.

12. • Ignition OFF.

• Disconnect connector YE56 from cruise control

module and connector YB175 (high series BCM) or

YB164 (low series BCM) from BCM.

• Check for continuity between connector YE56,

terminal H and connector YB175, terminal 26 or

YB164, terminal 8, circuit 83 (Grey wire).

• Does continuity exist?

Replace cruise

control module

assembly, refer

to 2.2 CRUISE

CONTROL

MODULE in this

Section.

Repair open in

circuit 83,

recheck and

verify repair.

13. • Remove connector YE56 from cruise control

module.

• Ignition ON.

• Measure voltage at connector YE56, terminal G,

circuit 20 (Blue/Red wire) to earth.

• Is voltage as specified?

Less than

1 Volt Go to Step 14. Check operation

of stop lamp

switch (switch A).

In particular, look

for improperly

adjusted stop

lamp switch.

Repair as

necessary,

recheck and

verify repair.

14. • With connector YE56 still disconnected from cruise

control module and ignition ON, measure voltage at

connector YE56, terminal D, circuit 86 (Brown wire)

to earth.

• Is voltage as specified?

Approximately

12 Volts Go to Step 15. Check operation

of electrical

release switch

(switch B) and

clutch switch. In

particular, look

for improperly

adjusted

switches or

check for open in

circuit 86. Repair

as necessary,

recheck and

verify repair.

15. • With connector YE56 still disconnected from cruise

control module and ignition ON (using an

appropriate jumper lead from KM 609) place a short

between cruise control connector YE56, terminal J

and earth.

• Does the cruise control ACTIVE lamp illuminate in

the instrument cluster?

Go to Step 17. Go to Step 16.

16. • Ignition OFF.

• Disconnect connector YB66 from instrument

cluster.

• Check for continuity between connector YE56,

terminal J and connector YB66, terminal 2, circuit

85 (White wire).

• Does continuity exist?

Check ACTIVE

lamp bulb, if OK,

replace

instrument panel

cluster, refer to

INSTRUMENTS,

WI PERS /

WASHERS &

HORN in the VT

Series I Service

Information.

Repair open in

circuit 85,

recheck and

verify repair.

STEP ACTION VALUE YES NO

17. • Jack up rear of vehicle and support on safety

stands.

• Back probe cruise control connector YE56, terminal

K, circuit 123 (Violet/White) with a Voltmeter to

earth.

• Ignition ON.

• Spin rear wheels by hand.

• Does voltage vary as specified?

Varies from

less than 1

Volt to greater

than 10 Volts

Go to Step 18. Check for open

or short to earth

in circuit 123

(Violet/White

wire) between

PCM and cruise

control module

connector YE56,

recheck and

verify repair

NOTE: If circuit

123 is OK, refer

to PCM

diagnosis in the

VT Series I

Service

Information for

V6 Engine, or in

the VT Series II

Service

Infomration for

GEN III V8

Engine of this

Service

Information CD.

18. • Connect all electrical connectors.

• Drive vehicle at approximately 50 km/h and press

the

SET-COAST button to set vehicle speed.

• Does the cruise fail to hold speed?

Go to Step 19. System OK.

19. • Check condition and adjustment of cruise control

cable, refer to 2. SERVICE OPERATIONS

• 2.1 CRUISE CONTROL CABLE, in this Se ction.

• Is cable OK?

Go to Step 20. Adjust or replace

as necessary the

cruise control

cable, refer to 2.

SERVICE

OPERATIONS

2.1 CRUISE

CONTROL

CABLE in this

Section.

20. • Perform switch diagnostic test, refer to 3.3 SELF

DIAGNOSTIC TEST, SWITCH DIAGNOSTIC TEST

CHART in this Secti on.

• Does test highlight a fault with the system?

Repair fault as

necessary,

recheck and

verify repair.

Replace cruise

control module

assembly, refer

to 2.2 CRUISE

CONTROL

MODULE in this

Section.

4. TORQUE WRENCH SPECIFI CATIONS

Cable Mounting Bracket Securing Bolt................................. 6 – 14

Control Module Securing Screw ........................................... 2 – 5

Lever Stud Nut...................................................................... 1 – 3

5. SPECIAL TOOLS

TOOL NO. REF IN TEXT TOOL DESCRIPTION COMMENTS

J39200 DIGITAL MULTIMETE R TOOL NO. J39200 PRE V IOUSLY

RELEASED, OR USE

COMMERCIALLY AVAILABLE

EQUIVALENT. MUST HAVE 10 MEG

OHM INPUT IMPEDANCE

KM-609 ELECTRONIC KIT USED IN CONJUNCTIO N WITH A

MULTIMETER FOR MEASURING

VOLTAGES AND RESISTANCES

WITHOUT DA MA GI NG WIRING

HARNESS CONNECTORS