SECTION 8B

CRUISE CONTROL SYSTEM - HFV6

Service Precaution

General Description

Brake Switch

Removal

Installation

Adjustment

Clutch Switch

Removal and Installation

Adjustment

Starter Switch

Removal

Installation

Cruise Control Main Switch

Removal

Installation

Cruise Control Switch (Combination

Switch)

Removal and Installation

Cruise Control Unit

Removal

Installation

Cruise Actuator

Actuator Cable Diagram

Removal

Installation

Adjustment

Mode Switch

Removal and Installation

Cruise Control System Check

Cruise Main Lamp Inoperative

Cruise Set Lamp Inoperative

Diagnosis

DTC Display Condition

DTC Display Format

Circuit Diagram

DTC 1-1 Motor System Short Circuit

DTC 1-2 Clutch Open or Short Circuit

DTC 1-3 Mechanical Defect

DTC 1-4 Close Side of Motor System

DTC 2-1 Signal of Vehicle Speed

Malfunction

DTC 3-1 Turning On Switch At All Time

Or At The Same Time

Techline

Service Precaution

WARNING: THIS VEHICLE HAS A SUPPLEMENTAL RESTRAIN SYSTEM (SRS). REFER TO THE SRS

COMPONENT AND WIRING LOCATION VIEW IN ORDER TO DETERMINE WHETHER YOU ARE

PERFORMING SERVICE ON OR NEAR THE SRS COMPONENTS OR THE SRS WIRING. WHEN YOU ARE

PERFORMING SERVICE ON OR NEAR THE SRS COMPONENTS OR THE SRS WIRING, REFER TO THE SRS

SERVICE INFORMATION. FAILURE TO FOLLOW WARNINGS COULD RESULT IN POSSIBLE AIR BAG

DEPLOYMENT, PERSONAL INJURY, OR OTHER WISE UNNEEDED SRS SYSTEM REPAIRS.

CAUTION: Always use the correct fastener in the proper location. When you replace a faster, use ONLY the

exact part number for that application. Dealer will call out those fasteners that require a replacement after

removal. Dealer will also call out the fasteners that require thread lockers or thread sealant. UNLESS

OTHERWISE SPECIFIED, do not use supplemental coatings (Paints, greases, or other corrosion inhibitors)

on threaded fasteners or fastener joint interfaces. Generally, such coatings adversely affect the fastener

torque and joint Clamping force, and may damaged the fastener. When you install fasteners, use the

correct tightening sequence and specifications. Following these instructions can help you avoid damage

to parts and systems.

General Description

The cruise control keeps the vehicle running at a fixed speed until a signal canceling this fixed speed is received.

When the main switch “AUTO CRUISE” is turned on with the vehicle in the running mode, the battery voltage is

applied to the control unit. When a signal from the control unit while the vehicle is in this state, the cruise control

actuator is activated to operate the system. Also, while the system is operating, the “AUTO CRUISE” indicator light

in the meter assembly lights up.

LTW48BSH000101

1. SET/COAST Switch Function

1. Set Function: When the SET/COAST switch is pressed and released with the main switch on, the speed at

which the vehicle is running at that moment is stored in the memory, and the vehicle automatically runs at

the stored speed.

2. COAST-down Function: When the SET/COAST switch is kept on while the vehicle in running, the vehicle

decelerates during that time. The speed at which vehicle is running when the control switch is pressed in the

memory, and the vehicle automatically returns to the stored speed.

3. Tap-down Function: When the SET/COAST switch is pressed and released instantaneously while the

vehicle is running, the vehicle decelerates a mile for each on/off operation. The vehicle speed at which the

vehicle was running when the SET/COAST was released last is stored in the memory, and the vehicle

automatically returns to this stored speed.

2. RESUME/ACCEL Switch Function

1. Resume Function: When the RESUME/ACCEL switch is turned on/off after the system is temporarily

deactivated by pressing the brake or clutch pedal while the vehicle is running, the vehicle resumes the

speed stored before the system was released, and the vehicle automatically runs at the stored speed.

2. Accelerate Function: When the RESUME/ACCEL switch is kept on the vehicle accelerates its speed during

that time. The vehicle speed at which the vehicle was running when the switch was turned off is stored in the

memory, and the vehicle automatically returns to this speed.

3. Tap-up Function: When the RESUME/ACCEL switch is turned on and off instantaneously while the vehicle

is running, the vehicle decelerates a mile for each on/off operation. The vehicle speed at which the vehicle

was running when the switch was turned off last is stored in the memory, and the vehicle automatically

returns to this stored speed.

3. CANCEL Function

1. Temporary Cancellation:

• Brake pedal is pressed.

• Clutch pedal is pressed. (M/T)

• Select lever is shifted to any position other than “D”, “3”, “2” or “L”. (A/T)

• Cancel switch is operated.

• Vehicle speed exceeds about 12.5mph over the vehicle speed stored in the memory.

Turning the RESUME/ACCEL switch will return the vehicle to the speed stored in the cruise control memory.

2. Complete Cancellation:

• Starter switch or the main switch is turned off.

• Fail-safe function is activated.

• Vehicle speed is about 38 km/h mph.

• Speed becomes 20 (12.5) km/h (mph) or less form the speed memorized by Control unit.

Brake Switch

RTW3A0MH000101

Removal

1. Disconnect the battery ground cable.

2. Remove the brake switch.

• Disconnect the connector (1).

• Loosen lock nuts of the switch (2).

• Remove the switch by turning it (3).

Installation

To install, follow the removal steps in the reverse order, noting

the following points.

1. Check to see if the brake pedal has been returned by the

return spring to the specified position.

2. Turn the switch clock-wise until the tip of the threaded

portion of the brake switch contacts the pedal arm.

RTW3A0SH000901

3. Turn the switch counter-clock-wise until the space between

the tip of the threaded portion and the pedal arm is 0.2 to

1.2 mm (0.01-0.06 in.) as shown in the figure.

Adjustment

1. Check to be sure that the brake pedal has been completely

returned by the return spring.

2. Disconnect the switch connector.

RTW3A0SH001201

3. Release the lock (2) by turning the switch (1) counter-clock-

wise.

fter doing so, pull the pedal arm (3) to you a little so that

the pedal arm is not pushed in.

5. Making the pedal arm not movable with one hand, push in

the whole switch with the other hand until the plunger of the

switch is pushed in and the switch itself hits the rubber o

the pedal arm.

In the condition, turn the switch clock-wise until "click"

sound is made and lock it.

By doing this, the switch is adjusted at 0.2 to 1.2mm (0.01-

0.06 in.) clearance.

Clutch Switch

Removal and Installation

Refer to the Clutch Control removal and installation steps in

Clutch section.

Adjustment

1. Turn the clutch switch or stopper bolt 1 until the switch bolt

or stopper bolt just touches the clutch pedal arm.

djust clutch switch or stopper bolt by backing it out half a

turn, and measure the clearance (L) between the clutch

pedal arm and the clutch switch bolt end or stopper bolt.

3. Lock the lock nut 2.

4. Connect the clutch switch connector.

Clutch switch and clutch and clutch pedal clearance

mm (in)

Limit 0.5-1.5 (0.020-0.059)

Starter Switch

431R300001

Removal

1. Steering Lock Assembly

• Refer to the Steering Lock assembly removal steps o

"Steering Column" in Power-

ssisted Steering System

section.

2. Starter Switch

Installation

Follow the removal procedure in the reverse order to install the

starter switch.

Cruise Control Main Switch

Removal

1. Disconnect the battery ground cable.

RTW3A0SH001301

2. Remove the side ventilation grille.

RTW3A0SH001401

3. Disconnect the switch connector and push the lock from

the backside of the side ventilation grille to remove the

cruise control main switch.

Installation

To install, follow the removal steps in the reverse order, noting

the following point.

1. Push in the switch with your fingers until it locks securely.

Cruise Control Switch (Combination Switch)

Removal and Installation

Refer to the Lighting Switch (Combination Switch) removal and

installation steps of Lighting System in Body and Accessories

section.

Cruise Control Unit

RTW3A0SH001101

Removal

1. Disconnect the battery ground cable.

2. Remove the dash side trim panel (LH) (1).

3. Disconnect the connector.

4. Remove a fixing nut to remove the cruise control unit (2).

Installation

To install, follow the removal steps in the reverse order.

Cruise Actuator

Actuator Cable Diagram

RTW3A0SF000301

Legend

(1) Cruise Actuator Assembly

(2) Cruise Control Cable

(3) Accelerator Cable

(4) Throttle Link (Cruise Control Side)

RTW3A0SH001001

Removal

1. Disconnect the battery cable.

2. Remove the cruise actuator Assembly (4).

• Disconnect the connector (3).

• Remove the cable end (1) from the throttle link (cruise

control side).

• Loosen a fixing nut of the cruise control cable (2).

• Remove fixing screws of the actuator (5).

Installation

To install, follow the removal steps in the reverse order, noting

the following point.

1. Take care not to bend the cable excessively.

RTW3A0SH001501

Adjustment

After installing the cruise actuator, the following steps must be

carried out for cruise control cable adjustment.

1. Install the cruise control cable end (3) to the throttle link (4).

2. Put the screw portion of the cable in the bracket (5).

3. Put the nut (1) to the bracket and then tighten the nut (2).

CAUTION: Don't move a position of the nut (1) from

supplied condition.

4. If the distance between the throttle link (4) and the throttle

link lever (6) is out of the specified range, loosen the nut (2)

to adjust it.

Mode Switch

Removal and Installation

Refer to the Mode Switch removal and installation steps in

Automatic Transmission section.

Cruise Control System Check

Step Action Value YES NO

1 1. Start the engine.

2. Turn ON the cruise main switch.

3. Check the cruise main lamp in the cruise main switch.

Does the cruise main lamp ON?

–

Go to Step 2

Go to Cruise

Main Lamp

Inoperative

2 Does the cruise main lamp flash? Refer to

Diagnosis in

this section Go to Step 3

3 1. Drive the vehicle at 80 km/h (50 MPH) on a flat level

road.

2. Press and release the cruise set/coast switch.

3. Verify the 80 km/h (50 MPH) vehicle speed is

maintained.

4. Tap the cruise set/coast switch 10 times.

Did the vehicle maintain the set speed of 40 km/h (25

MPH), and then decrease by 1.6 km/h (1 MPH) each time

the switch was tapped?

–

Go to Step 4 Go to Step 9

4 Check the cruise set lamp in the instrument panel.

Is the cruise set lamp illuminated? – Go to Step 5

Go to Cruise

Set Lamp

Inoperative

5 Tap the cruise resume/accel. switch 10 times.

Does the vehicle increase by 1.6 km/h (1 MPH) each time

the switch was tapped? – Go to Step 6 Go to Step 15

6 Press and release the brake pedal.

Is the cruise set lamp turned OFF? – Go to Step 7 Go to Step 18

7 1. Drive the vehicle at 40 km/h (25 MPH).

2. Press and release the cruise set/coast switch.

3. Press and release the clutch pedal (for M/T) or place

the shift lever at the neutral position (for A/T).

Is the cruise set lamp turned OFF?

–

Go to Step 8 Go to Step 25

8 1. Drive the vehicle at 40 km/h (25 MPH).

2. Press and release the cruise set/coast switch.

3. Turn the end of the cruise control lever to CANCEL

position.

Is the cruise set lamp turned OFF?

–

System OK Go to Step 32

9 1. Stop the vehicle.

2. Verify the cruise main switch that is turned ON.

3. Turn ON and OFF the cruise cancel switch for 3 times

within 2 seconds.

4. Observe the flashing of the cruise main lamp.

Does the cruise main lamp indicate any DTC?

– Go to

Applicable

Diagnostic

Trouble Code Go to Step 10

Step Action Value YES NO

10 1. Turn OFF the ignition.

2. Disconnect the cruise control unit harness connector.

3. Connect a DMM between the cruise set/coast switch

circuit (pin 4 of C-120 connector) and a known good

ground.

4. Turn ON the ignition, with the engine OFF.

5. Turn ON the cruise set/coast switch.

Is the DMM voltage more than the specified value?

10 volts

Go to Step 42 Go to Step 11

11 1. Turn OFF the ignition.

2. Disconnect the cruise control switch harness

connector.

3. Connect a 3-amp fused jumper wire between the

cruise set/coast switch circuits (pins 11 and 12 of B-59

connector).

4. Connect a DMM between the cruise set/coast switch

circuit (pin 4 of C-120 connector) and a known good

ground.

5. Turn ON the ignition, with the engine OFF.

Is the DMM voltage more than the specified value?

10 volts

Go to Step 38 Go to Step 12

12 1. Disconnect a 3-amp fused jumper wire.

2. Connect a DMM between the cruise control switch

power supply circuit (pin 11 of B-59 connector) and a

known good ground.

Is the DMM voltage more than the specified value?

10 volts

Go to Step 13 Go to Step 14

13 Repair the circuit between the cruise set/coast switch (pin

12 of B-59 connector) and the cruise control unit (pin 4 of

C-120 connector).

Did you complete the repair?

–

Go to Step 48 –

14 Repair the circuit between the Turn (10A) fuse and the

cruise set/coast switch (pin 12 of B-59 connector).

Did you complete the repair? – Go to Step 48 –

15 1. Turn OFF the ignition.

2. Disconnect the cruise control unit harness connector.

3. Connect a DMM between the cruise resume/accel.

switch circuit (pin 3 of C-120 connector) and a known

good ground.

4. Turn ON the ignition, with the engine OFF.

5. Turn ON the cruise set/coast switch.

Is the DMM voltage more than the specified value?

10 volts

Go to Step 42 Go to Step 16

Step Action Value YES NO

16 1. Turn OFF the ignition.

2. Disconnect the cruise control switch harness

connector.

3. Connect a 3-amp fused jumper wire between the

cruise resume/accel. switch circuits (pins 11 and 9 of

B-59 connector).

4. Connect a DMM between the cruise resume/accel.

switch circuit (pin 3 of C-120 connector) and a known

good ground.

5. Turn ON the ignition, with the engine OFF.

Is the DMM voltage more than the specified value?

10 volts

Go to Step 39 Go to Step 17

17 Repair the circuit between the cruise resume/accel. switch

(pin 9 of B-59 connector) and the cruise control unit (pin 3

of C-120 connector).

Did you complete the repair?

–

Go to Step 48 –

18 1. Turn OFF the ignition.

2. Disconnect the cruise control unit harness connector.

3. Connect a DMM between the stop lamp switch circuit

(pin 2 of C-120 connector) and a known good ground.

4. Turn ON the ignition, with the engine OFF.

5. Press the brake pedal.

Is the DMM voltage more than the specified value?

10 volts

Go to Step 35 Go to Step 19

19 1. Turn OFF the ignition.

2. Inspect the Stop (15A) fuse.

Is the Stop (15A) fuse open? – Go to Step 20 Go to Step 21

20 Replace the Stop (15A) fuse. If the fuse continues to

open, repair the short to ground on one of the circuits that

is fed by the Stop (15A) fuse or replace the shorted

attached component fed by the Stop (15A) fuse.

Did you complete the replacement?

–

Go to Step 48 –

21 1. Turn OFF the ignition.

2. Disconnect the stop lamp switch harness connector.

3. Connect a 3-amp fused jumper wire between the stop

lamp switch circuits (pins 1 and 2 of C-44 connector).

4. Connect a DMM between the stop lamp switch circuit

(pin 2 of C-120 connector) and a known good ground.

5. Turn ON the ignition, with the engine OFF.

6. Press the brake pedal.

Is the DMM voltage more than the specified value?

10 volts

Go to Step 40 Go to Step 22

22 1. Disconnect a 3-amp fused jumper wire.

2. Connect a DMM between the stop lamp switch power

supply circuit (pin 1 of C-44 connector) and a known

good ground.

Is the DMM voltage more than the specified value?

10 volts

Go to Step 23 Go to Step 24

23 Repair the circuit between the stop lamp switch (pin 2 of

C-44 connector) and the cruise control unit (pin 2 of C-120

connector).

Did you complete the repair?

–

Go to Step 48 –

Step Action Value YES NO

24 Repair the circuit between the Stop (15A) fuse and the

stop lamp switch (pin 1 of C-44 connector).

Did you complete the repair? – Go to Step 48 –

25 Does the vehicle have the automatic transmission? – Go to Step 26 Go to Step 29

26 1. Turn OFF the ignition.

2. Install a scan tool.

3. Monitor the Diagnostic Trouble Code (DTC)

Information of the automatic transmission control

system with a scan tool.

Is DTC P0705 set?

–

Go to DTC

P0705 in

Transmission

Control

System

(AW30-40LE)

section Go to Step 27

27 1. Turn OFF the ignition.

2. Disconnect the cruise control unit harness connector.

3. Connect a DMM between the inhibitor switch circuit

(pin 12 of C-120 connector) and a known good ground.

4. Turn ON the ignition, with the engine OFF.

5. Place the shift lever at the neutral position.

Is the DMM voltage less than the specified value?

0.1 volts

Go to Step 35 Go to Step 28

28 Repair the circuit between the diode (pin 2 of X-16

connector) and the cruise control unit (pin 12 of C-120

connector).

Did you complete the repair?

–

Go to Step 48 –

29 1. Turn OFF the ignition.

2. Disconnect the cruise control unit harness connector.

3. Connect a DMM between the clutch switch circuit (pin

12 of C-120 connector) and a known good ground.

4. Turn ON the ignition, with the engine OFF.

5. Press the clutch pedal.

Is the DMM voltage less than the specified value?

0.1 volts

Go to Step 35 Go to Step 30

30 1. Turn OFF the ignition.

2. Disconnect the clutch switch harness connector.

3. Connect a DMM between the clutch switch circuits

(pins 1 and 2 of C-77 connector) and a known good

ground.

4. Turn ON the ignition, with the engine OFF.

Is the DMM voltage less than the specified value?

0.1 volts

Go to Step 45 Go to Step 31

31 Repair the circuit between the clutch switch (pin 1 of C-77

connector) and the cruise control unit (pin 12 of C-120

connector).

Did you complete the repair?

–

Go to Step 48 –

32 1. Turn OFF the ignition.

2. Disconnect the cruise control unit harness connector.

3. Connect a DMM between the cruise cancel switch

circuit (pin 10 of C-120 connector) and a known good

ground.

4. Turn ON the ignition, with the engine OFF.

5. Turn ON the cruise cancel switch.

Is the DMM voltage more than the specified value?

10 volts

Go to Step 35 Go to Step 33

Step Action Value YES NO

33 1. Turn OFF the ignition.

2. Disconnect the cruise control switch harness

connector.

3. Connect a 3-amp fused jumper wire between the

cruise cancel switch circuits (pins 11 and 10 of B-59

connector).

4. Connect a DMM between the cruise cancel switch

circuit (pin 10 of C-120 connector) and a known good

ground.

5. Turn ON the ignition, with the engine OFF.

Is the DMM voltage more than the specified value?

10 volts

Go to Step 41 Go to Step 34

34 Repair the circuit between the cruise cancel switch (pin 10

of B-59 connector) and the cruise control unit (pin 10 of C-

120 connector).

Did you complete the repair?

–

Go to Step 48 –

35 Check the cruise set lamp in the instrument panel.

Does the cruise set lamp illuminate? – Go to Step 36 Go to Step 47

36 1. Turn OFF the ignition.

2. Remove the instrument panel cluster (IPC) enough to

disconnect the B-24 harness connector.

3. Connect a DMM between the cruise set lamp circuits

(pins 30 and 20 of B-24 connector.

4. Turn ON the ignition, with the engine OFF.

Is the DMM voltage less than the specified value?

0.1 volts

Go to Step 46 Go to Step 37

37 Repair the circuit between the IPC (pin 20 of B-59

connector) and the cruise control unit (pin 14 of C-120

connector).

Did you complete the repair?

–

Go to Step 48 –

38 1. Turn OFF the ignition.

2. Inspect for an intermittent and for poor connections on

the cruise set/coast switch circuit at the cruise control

switch harness connector (pin 12 of B-59 connector).

3. Repair the connection(s) as necessary.

Did you find and correct the condition?

–

Go to Step 48 Go to Step 43

39 1. Turn OFF the ignition.

2. Inspect for an intermittent and for poor connections on

the cruise resume/accel. switch circuit at the cruise

control switch harness connector (pin 9 of B-59

connector).

3. Repair the connection(s) as necessary.

Did you find and correct the condition?

–

Go to Step 48 Go to Step 43

40 1. Turn OFF the ignition.

2. Inspect for an intermittent and for poor connections on

the stop lamp switch circuits (pins 1 and 2 of C-44

connector).

3. Repair the connection(s) as necessary.

Did you find and correct the condition?

–

Go to Step 48 Go to Step 44

Step Action Value YES NO

41 1. Turn OFF the ignition.

2. Inspect for an intermittent and for poor connections on

the cruise cancel switch circuit at the cruise control

switch harness connector (pin 10 of B-59 connector).

3. Repair the connection(s) as necessary.

Did you find and correct the condition?

–

Go to Step 48 Go to Step 43

42 1. Turn OFF the ignition.

2. Inspect for an intermittent and for poor connections on

applicable circuit at the cruise control unit harness

connector (pin 4, 3, 10 or 2 of C-120 connector).

3. Repair the connection(s) as necessary.

Did you find and correct the condition?

–

Go to Step 48 Go to Step 47

43 Replace the combination switch.

Did you complete the replacement? – Go to Step 48 –

44 Replace the stop lamp switch.

Did you complete the replacement? – Go to Step 48 –

45 Replace the clutch switch.

Did you complete the replacement? – Go to Step 48 –

46 Replace the IPC.

Did you complete the replacement? – Go to Step 48 –

47 Replace the cruise control unit

Did you complete the replacement? – Go to Step 48 –

48 1. Reconnect all previously disconnected harness

connector(s).

2. Turn OFF the ignition.

Is the action complete?

–

Go to Step 1 –

Cruise Main Lamp Inoperative

Step Action Value YES NO

1 1. Turn OFF the ignition.

2. Disconnect the cruise control unit harness connector.

3. Connect a DMM between the cruise main switch circuit

(pin 11 of C-120 connector) and a known good ground.

4. Turn ON the ignition, with the engine OFF.

5. Turn ON the cruise main switch.

Is the DMM voltage more than the specified value?

10 volts

Go to Step 8 Go to Step 2

2 1. Turn OFF the ignition.

2. Disconnect the cruise main switch harness connector.

3. Connect a 3-amp fused jumper wire between the

cruise main switch circuits (pins 4 and 3 of B-67

connector).

4. Connect a DMM between the cruise main switch circuit

(pin 11 of C-120 connector) and a known good ground.

5. Turn ON the ignition, with the engine OFF.

Is the DMM voltage more than the specified value?

10 volts

Go to Step 11 Go to Step 3

3 1. Disconnect a 3-amp fused jumper wire.

2. Connect a DMM between the cruise main switch power

supply circuit (pin 4 of B-67 connector) and a known

good ground.

Is the DMM voltage more than the specified value?

10 volts

Go to Step 6 Go to Step 4

4 1. Turn OFF the ignition.

2. Inspect the Turn (10A) fuse.

Is the Turn (10A) fuse open? – Go to Step 5 Go to Step 7

5 Replace the Turn (10A) fuse. If the fuse continues to

open, repair the short to ground on one of the circuits that

is fed by the Turn (10A) fuse or replace the shorted

attached component fed by the Turn (10A) fuse.

Did you complete the replacement?

–

Go to Step 16 –

6 Repair the circuit between the cruise main switch (pin 3 of

B-67 connector) and the cruise control unit (pin 11 of C-

120 connector).

Did you complete the repair?

–

Go to Step 16 –

7 Repair the circuit between the Turn (10A) fuse and the

cruise main switch (pin 4 of B-67 connector).

Did you complete the repair? – Go to Step 16 –

8 Connect a 3-amp fused jumper wire between the cruise

main lamp circuit (pin 13 of C-120 connector) and a

known good ground.

Does the cruise main lamp illuminate?

–

Go to Step 13 Go to Step 9

9 1. Turn OFF the ignition.

2. Disconnect the cruise main switch harness connector.

3. Connect a 3-amp fused jumper wire between the

cruise main lamp circuits (pins 4 and 6 of B-67

connector).

4. Connect a DMM between the cruise main lamp circuit

(pin 13 of C-120 connector) and a known good ground.

10 volts

Go to Step 12 Go to Step 10

Step Action Value YES NO

5. Turn ON the ignition, with the engine OFF.

Is the DMM voltage more than the specified value?

10 Repair the circuit between the cruise main lamp (pin 6 of

B-67 connector) and the cruise control unit (pin 13 of C-

120 connector).

Did you complete the repair?

–

Go to Step 16 –

11 1. Turn OFF the ignition.

2. Inspect for an intermittent and for poor connections on

the cruise main switch circuits at the cruise main switch

harness connector (pins 4 and 3 of B-67connector).

3. Repair the connection(s) as necessary.

Did you find and correct the condition?

–

Go to Step 16 Go to Step 14

12 1. Turn OFF the ignition.

2. Inspect for an intermittent and for poor connections on

the cruise main lamp circuit at the cruise main switch

harness connector (pin 6 of B-67 connector).

3. Repair the connection(s) as necessary.

Did you find and correct the condition?

–

Go to Step 16 Go to Step 14

13 1. Turn OFF the ignition.

2. Inspect for an intermittent and for poor connections on

cruise main switch circuit and cruise main lamp circuit

at the cruise control unit harness connector (pins 11

and 13 of C-120 connector).

3. Repair the connection(s) as necessary.

Did you find and correct the condition?

–

Go to Step 16 Go to Step 15

14 Replace the cruise main switch.

Did you complete the replacement? – Go to Step 16 –

15 Replace the cruise control unit

Did you complete the replacement? – Go to Step 16 –

16 1. Reconnect all previously disconnected harness

connector(s).

2. Turn OFF the ignition.

Is the action complete?

– Go to Cruise

Control

System Check

Step 1 –

Cruise Set Lamp Inoperative

Step Action Value YES NO

1 1. Turn OFF the ignition.

2. Disconnect the cruise control unit harness connector.

3. Connect a 3-amp fused jumper wire between the

cruise main lamp circuit (pin 14 of C-120 connector)

and a known good ground.

4. Turn ON the ignition, with the engine OFF.

Does the cruise main lamp illuminate?

–

Go to Step 9 Go to Step 2

2 1. Turn OFF the ignition.

2. Remove the instrument panel cluster (IPC) enough to

disconnect the B-24 harness connector.

3. Connect a DMM between the cruise set lamp circuits

(pins 30 and 20 of B-24 connector.

4. Turn ON the ignition, with the engine OFF.

Is the DMM voltage more than the specified value?

10 volts

Go to Step 8 Go to Step 3

3 1. Disconnect a 3-amp fused jumper wire.

2. Connect a DMM between the cruise set lamp power

supply circuit (pin 30 of B-24 connector) and a known

good ground.

Is the DMM voltage more than the specified value?

10 volts

Go to Step 6 Go to Step 4

4 1. Turn OFF the ignition.

2. Inspect the Meter (15A) fuse.

Is the Meter (15A) fuse open? – Go to Step 5 Go to Step 7

5 Replace the Meter (15A) fuse. If the fuse continues to

open, repair the short to ground on one of the circuits that

is fed by the Meter (15A) fuse or replace the shorted

attached component fed by the Meter (15A) fuse.

Did you complete the replacement?

–

Go to Step 12 –

6 Repair the circuit between the IPC (pin 20 of B-24

connector) and the cruise control unit (pin 14 of C-120

connector).

Did you complete the repair?

–

Go to Step 12 –

7 Repair the circuit between the Meter (15A) fuse and the

IPC (pin 30 of B-24 connector).

Did you complete the repair? – Go to Step 12 –

8 1. Turn OFF the ignition.

2. Inspect for an intermittent and for poor connections on

the cruise set lamp circuits at the IPC harness

connector (pins 20 and 30 of B-67 connector).

3. Repair the connection(s) as necessary.

Did you find and correct the condition?

–

Go to Step 12 Go to Step 10

9 1. Turn OFF the ignition.

2. Inspect for an intermittent and for poor connections on

cruise main lamp circuit at the cruise control unit

harness connector (pin 14 of C-120 connector).

3. Repair the connection(s) as necessary.

Did you find and correct the condition?

–

Go to Step 12 Go to Step 11

Step Action Value YES NO

10 Replace the cruise set lamp bulb or the IPC.

Did you complete the replacement? – Go to Step 12 –

11 Replace the cruise control unit

Did you complete the replacement? – Go to Step 12 –

12 1. Reconnect all previously disconnected harness

connector(s).

2. Turn OFF the ignition.

Is the action complete?

– Go to Cruise

Control

System Check

Step 3 –

Diagnosis

The cruise control unit uses the cruise main indicator light and diagnosis the failure, when the control unit detects

abnormality on the table below.

PART POSSIBLE CAUSE DETECTION PERIOD DTC

Actuator Motor system short circuit Energizing motor 1-1

Clutch system short circuit Energizing clutch 1-2

Clutch system open circuit Energizing clutch 1-2

Mechanical defect Cruise controlling 1-3

Close side of motor system open circuit Cruise controlling 1-1

Cruise control unit Close side of motor system open circuit While starter sw on 1-4

Clutch output abnormality While starter sw on 1-4

Vehicle speed sensor Signal of vehicle speed disconnection Cruise controlling 2-1

Signal of vehicle speed abnormality Cruise controlling 2-1

Switch Turning on switch at all times While starter sw on 3-1

Turning on switch at the same time While starter sw on 3-1

DTC : Diagnostic Trouble Code

DTC Display Condition

1. Turn the ignition ON, with engine OFF or let the engine run at idle.

2. Turn the cruise main switch ON.

3. Turn the cruise cancel switch ON and OFF for three times within 2 seconds.

4. Observe the cruise main warning lamp on the cruise main switch.

5. Read flashing of the cruise main warning lamp.

NOTE:

• Flashing of the cruise main warning lamp is stopped when the vehicle speed rises above 10km/h or the cruise

resume switch is turned ON.

• The DTC is cleared when the ignition is turned OFF.

DTC Display Format

1. When no DTCs are detected. (The unit : sec.)

F08RW003

2. When two or more DTCs are detected. (The unit : sec.)

F08RW009

Circuit Diagram

RTW680XF015901

DTC 1–1 Motor System Short Circuit

Step Action Value(s) YES NO

1 1. Turn the starter switch off.

2. Disconnect the actuator connector C-119.

3. Measure resistance between actuator side

connector terminal 1 and 2.

If control plate position is fully opened or fully

closed, resistance can not be measure.

Is there resistance within range specified in the

value(s) column?

More than

4.2Ω

Go to Step 2

Replace the

actuator

2 Measure continuity between harness side connector

C-119 terminal 1 and the ground, terminal 2 and the

ground, and terminals 1 and 2.

Are the results same as specified in the value(s)

column?

continuity

Replace the

control unit

Repair or

replace the

harness

DTC 1–2 Clutch System Open or Short Circuit

Step Action Value(s) YES NO

1 1. Turn the starter switch off.

2. Disconnect the actuator connector C–119.

3. Measure resistance between actuator side

connector terminal 3 and 4.

Is there resistance within range specified in the

value(s) column?

34.7 –

42.4Ω

Go to Step 2

Replace the

actuator

2 1. Disconnect the brake switch connector C–44.

2. Check continuity between switch side connector

terminal 3 and 4.

Is there continuity between terminals?

—

Go to Step 3

Replace the

switch

3 1. Reconnect the brake switch connector C–44.

2. Check continuity between harness side

connector C–120 terminal 6 and connector C–44

terminal 3, connector C–119 terminal 4 and

connector C–120 terminal 8.

Is there continuity between terminals?

—

Go to Step 4

Replace open

circuit

4 Check continuity between harness side connector

C–119 terminal 3 and the ground, connector C–119

terminal 4 and the ground, connector C–120

terminal 6 and the ground.

Are the results same as specified in the value(s)

column?

continuity

Replace the

control unit

Repair short

circuit

DTC 1–3 Mechanical Defect

Step Action Value(s) YES NO

1 1. Turn the starter switch off.

2. Disconnect the actuator connector C–119.

3. Connect the battery positive terminal with the

actuator side connector terminal 3 and the battery

negative terminal with terminal 4.

Does the control plate move by hand?

—

Replace the

actuator

Go to Step 2

2 Connect the battery positive terminal with the

actuator side connector terminal 1 and 3, and the

battery negative terminal with terminal 2 and 4.

Does the control plate move to full open side?

—

Go to Step 3

Replace the

actuator

3 Connect the battery positive terminal with the

actuator side connector terminal 2 and 3, and the

battery negative terminal with terminal 1 and 4.

Does the control plate move to full close side?

—

Go to Step 4

Replace the

actuator

4 Is there continuity between harness side connector

C–119 terminal 1 and connector C–120 terminal 7,

connector C–119 terminal 2 and connector C–120

terminal 15?

—

Replace the

control unit

Repair or

replace

harness

DTC 1–4 Close Side of Motor System Open Circuit

Step Action Value(s) YES NO

1 1. Turn the starter switch off.

2. Disconnect the actuator connector C–119.

3. Measure resistance between actuator side

connector terminal 1 and 2.

If control plate position is fully opened or fully

closed, resistance can not be measured.

Is there resistance within range specified in the

value(s) column?

More than

4.2Ω

Go to Step 2

Replace the

actuator

2 Is there continuity between harness side connector

C–119 terminal 1 and connector C–120 terminal 7,

harness side connector C–119 terminal 2 and

connector C–120 terminal 15?

—

Replace the

control unit

Repair or

replace the

harness

DTC 2–1 Signal of Vehicle Speed Malfunction

Step Action Value(s) YES NO

1 Check the DTC for engine.

Is the vehicle speed sensor DTC set?

— Go to DTC for

engine

Go to Step 2

2 Check continuity between harness side connector

E–44 terminal 3 and connector C–120 terminal 9.

Is there continuity between terminals?

—

Go to Step 3

Replace open

circuit

3 Check the continuity between harness side

connector E–44 terminal 3 and ground, connector

C–120 terminal 9 and ground.

Are the results same as specified in the value(s)

column?

No continuity

Replace the

control unit

Repair short

circuit

DTC 3–1 Turning On Switch At All Time Or At The Same Time

Step Action Value(s) YES NO

1 1. Turn the starter switch off.

2. Disconnect the auto cruise control unit connector

C-120.

3. Turn the starter switch on.

4. Turn the cruise control switch “cancel”.

5. Check voltage at the harness side connector C–

120 terminal 10, terminal 3 and terminal 4.

Is the voltage specified value?

Go to Step 3

Go to Step 2

2 1. Turn the starter switch off.

2. Disconnect the cruise control switch connector

B–59.

3. Check voltage at the harness side connector C–

120 terminal 10, terminal 3 and terminal 4.

Is the voltage specified value?

Replace the

cruise control

switch

Repair short

circuit

3 1. Turn the starter switch off.

2. Turn the cruise control switch “cancel”.

3. Check the continuity between harness side

connector C–120 terminal 10 and terminal 3,

connector C–120 terminal 3 and terminal 4,

connector C–120 terminal 10 and terminal 4.

Are the results same as specified in the value(s)

column?

No continuity

Go to Step 5

Go to Step 4

4 1. Disconnect the cruise control switch connector

B–59.

2. Check the continuity between harness side

connector C–120 terminal 10 and terminal 3,

connector C–120 terminal 3 and terminal 4,

connector C–120 terminal 10 and terminal 4.

Are the results same as specified in the value(s)

column?

No continuity

Replace the

cruise control

switch

Repair short

circuit

5 Check the continuity between harness side

connector C–120 terminal 10 and connector B–59

terminal 10.

Is there continuity between terminals?

—

Replace the

control unit

Replace open

circuit