2004 ISUZU TF SERIES cruise control

ELECTRICAL-BODY AND CHASSIS 8A-3
PAGE
Power Window ........................................................................................................... 8A- 310
Audio, Clock and Cigarette Lighter .......................................................................... 8A- 329
Power Door Mirror ...................................................................................................... 8A- 337
Rear Defogger ............................................................................................................ 8A- 349
SRS-Air Bag ................................................................................................................ 8A- 358
Transfer Case Control Module .................................................................................. 8A- 361
Anti-Lock Brake System ............................................................................................ 8A- 373
Immobilizer ................................................................................................................. 8A- 376
Keyless Entry ............................................................................................................. 8A- 385
Anti Theft ....................................................................................................................8A- 400
Auto Cruise ................................................................................................................. 8A- 412
Trailer Hitch ................................................................................................................ 8A- 415
Connector List ................................................................................................................8A- 418

8A-420 ELECTRICAL-BODY AND CHASSIS


No. Connector face No. Connector face
B-55
White
J/B I3 B-65
SilverWeld splice 2 (Ground)
B-56
White
J/B I4 B-66
White44 switch
B-57
White
HVAC control unit B-67
(6VE1)
BlackCruise main
B-58
Black
Check connector B-68
(6VE1)
(4JH1-TC)
Immobilizer
B-59
White
Combination switch-A B-69
Door lock switch
B-60
White
Combination switch-B B-70
(6VE1)
(4JH1-TC)
Immobilizer Coil
B-61
Black
Flasher relay B-71
YellowHorn
B-62
White
Ignition switch (IGSUB : G1) B-72
YellowSRS
B-63
White
Ignition switch (IGSUB : G2) B-73
BlackWeld Splice 3
B-64
Silver
Weld splice 1 (Illumination) B-74
WhiteCellular phone

ELECTRICAL-BODY AND CHASSIS 8A-425


No. Connector face No. Connector face
C-120
(6VE1)
Auto cruise control


C-121
(C24SE)
IAT sensor


C-122
(C24SE)
White Co adjuster connector


C-123
(4JA1/A1-
TC)
Black EVRV; T/C


C-124

Black Lowe pressure sensor


C-125

White Therrmoswitch (Air)


C-126

White QOS controlunit

CRUISE CONTROL SYSTEM 8B-1
SECTION 8B
CRUISE CONTROL SYSTEM
TABLE OF CONTENTS
PAGE
Service Precaution .........................................................................................................................8B- 3
General Description .......................................................................................................................8B- 3
Brake Switch ...................................................................................................................................8B- 5
Removal .......................................................................................................................................8B- 5
Installation ..................................................................................................................................8B- 5
Adjustment ..................................................................................................................................8B- 6
Clutch switch ...................................................................................................................................8B- 6
Removal and Installation ........................................................................................................8B- 6
Adjustment ..................................................................................................................................8B- 6
Starter Switch ..................................................................................................................................8B- 6
Removal .......................................................................................................................................8B- 6
Installation ..................................................................................................................................8B- 6
Cruise Control Main Switch .........................................................................................................8B- 7
Removal .......................................................................................................................................8B- 7
Installation ..................................................................................................................................8B- 7
Cruise Control Switch (Combination Switch) ........................................................................8B- 7
Removal and Installation ........................................................................................................8B- 7
Cruise Control Unit ........................................................................................................................8B- 8
Removal .......................................................................................................................................8B- 8
Installation ..................................................................................................................................8B- 8
Cruise Actuator ...............................................................................................................................8B- 8
Actuator Cable Diagram ..........................................................................................................8B- 9
Removal .......................................................................................................................................8B- 9
Installation ..................................................................................................................................8B- 9
Adjustment ..................................................................................................................................8B- 9
Mode Switch ....................................................................................................................................8B- 9
Removal and Installation ........................................................................................................8B- 9

8B-2 CRUISE CONTROL SYSTEM
Diagnosis ..........................................................................................................................................8B- 10
DTC Display Condition ............................................................................................................8B- 10
DTC Display Format .................................................................................................................8B- 11
Circuit Diagram ..........................................................................................................................8B- 11
DTC 1-1 Motor System Short Circuit ....................................................................................8B- 13
DTC 1-2 Clutch Open or Short Circuit .................................................................................8B- 14
DTC 1-3 Mechanical Defect ....................................................................................................8B- 15
DTC 1-4 Close Side of Motor System ..................................................................................8B- 16
DTC 2-1 Signal of Vehicle Speed Malfunction ..................................................................8B- 17
DTC 3-1 Turning On Switch at All time or at the same time ..........................................8B- 18

CRUISE CONTROL SYSTEM 8B-3
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.

8B-4 CRUISE CONTROL SYSTEM
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.

CRUISE CONTROL SYSTEM 8B-5
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.