display ISUZU KB P190 2007 Workshop Repair Manual

8A-584 ELECTRICAL-BODY AND CHASSIS
RTW 38DLH000101
Menu
The left table shows witch functions are used for the
available equipment versions.
NOTE: Marked items are not applied for keyless entry
system.

DTC
On OBD has three options available in the Tech-2
DTC mode to display the enhanced information
available.
• Read DTC Info Ordered By Priority.
• Read DTC Info As Stored By ECU.
• Clear DTC and Alarm Code Info.

Clear DTC Information
To clear Diagnostic Trouble Codes (DTCs), Use the
diagnostic scan tool “Clear DTC Information” function.

Tech-2 Data Display
The Tech-2 data values represent values that would
be seen on a normally-keyless entry system.



RTW 38DSH001601
Actuator Test
Unlock/Lock Test
Check whether opening and closing of a door lock
can be performed by operation of Tech-2.
1. Turn the key “OFF”.
2. Turn the key “ON”.
3. Check the display and test menu.
4. Operate the Tech-2.


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ELECTRICAL-BODY AND CHASSIS 8A-585

RTW 38DSH001701
Turn Signal Test
Check the turn signal lamp lights up by operation of
Tech-2.
1. Turn the key “OFF”.
2. Turn the key “ON”.
3. Check the display and test menu.
4. Operate the Tech-2.


060R200289
Programming
Erase Remove Key
To erase remove control key code in the control unit.
1. Check the display of Tech-2 and press “Confirm”
key.
RTW 38DSH001001
2. Enter security code.
3. Press “Not Okay” or “Okay” key.

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8A-586 ELECTRICAL-BODY AND CHASSIS
RTW 38DSH001101
4. Check the display of Tech-2 and press “Confirm”
key.
RTW 38DSH001201
5. Check the display of Tech-2 and press “Confirm”
key.
060R200289
Program Remote Key
To program remote control key code in the control
unit.
1. Check the display of Tech-2 and press “Confirm”
key.

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ELECTRICAL-BODY AND CHASSIS 8A-587
RTW 38DSH001301
2. Check the following table in the display of Tech-2.
3. Operate the remote key.
RTW 38DSH001401
4. Check the display of Tech-2 and press “Confirm”
key.
RTW 38DSH001501
5. Check the display of Tech-2 and press “No” or
“Yes” key.


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Cruise Control – HFV6 Page 8C–5
Legend
1 Engine Control Module
2 Throttle Actuator Control (TAC) Assembly
3 Cruise Control Switch Assembly
4 Instrument Cluster Assembly 5 Cruise Control ON / OFF Switch
6 Powertrain Interface Module
7 Clutch Pedal Switch Assembly (Manual Only)
8 Stop Lamp Switch Assembly
Cruise Control Switch Assembly
The cruise control switch assembly is located on the end of
the wiper and washer switch assembly.
• For harness routing from the cruise control switch
assembly to the powertrain interface module, refer to
8A Electrical – Body and Chassis.
• For wiring and to see how the switch integrates into
the system, refer to 2.3 W iring Diagrams.
Figure 8C – 2
Instrument Cluster Assembly
The instrument cluster assembly displays the status of the cruise control system as well as other information via the
warning indicators.

Figure 8C – 3
Clutch Pedal Switch (Manual Only)
This switch assembly is attached to the clutch pedal support bracket. The switch is normally closed when the clutch
pedal is at rest, opening when the pedal is pressed. Activation of this switch removes the signal to the ECM, which will
then deactivate the cruise control.
Stop Lamp Switch Assembly
The stop lamp switch assembly is located on the brake pedal support bracket. This switch has two sets of contacts with
two independent functions. The function of the switch assembly in the cruise control system is to deactivate the cruise
control when the brake pedal is pressed as well as an initial safety check of the switch operation prior to activating cruise
control.

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Cruise Control – HFV6 Page 8C–6
The stop lamp switch contacts are normally open with the brake pedal at rest and close when the brake pedal is pressed
turning on the vehicles brake lamps. These switch contacts also double as the cruise cancel signal for the cruise control
operation.
The cruise control initial brake apply signal function switch contacts are normally closed with the brake pedal at rest and
open when the brake pedal is pressed. This switch function is a safety requirement of the vehicle as it ensures that the
cruise control cannot be activated without the brake pedal first being pressed.
Powertrain Interface Module
The Powertrain Interface Module (PIM) is located on the driver’s side, kick trim panel. The purpose of the PIM is to act as
an interface between the drivetrain serial data bus (GMLAN protocol) and the body side data bus (UART Bus protocol).
All inputs from the cruise control switch assembly are directly wired to the PIM. The PIM then takes these inputs,
converts them to GMLAN protocol and sends the messages via the data bus to the engine control module (ECM). The
PIM also receives signals for the cruise control system from the ECM. When the ECM activates cruise control, it sends a
signal through the PIM (which converts it from GMLAN to UART protocol) to display the various cruise control messages
on the instrument cluster assembly.
For further information on the operation of the PIM, refer to 6E1 Powertrain Interface Module – V6.
Engine Control Module
The Engine Control Module (ECM) is mounted on the front of the engine. The role of the ECM is to receive all the inputs
from various sensors (vehicle speed (VSS) etc.) and switches to manage the engine. W hen a request is sent from the
cruise control switch assembly via the PIM to the ECM, the ECM will activate cruise control providing given parameters
are satisfied. Once the cruise is set, the ECM monitors the vehicle speed and controls the throttle actuator assembly thus
controlling the speed of the vehicle.
For further information on the operation of the ECM, refer to 6C1-1 Engine Management – V6 – General Information.
Throttle Actuator Control (TAC) Assembly
The throttle actuator control assembly is located on the front of the inlet manifold. The throttle actuator control assembly
receives signals from the ECM and controls the angle of the throttle plate. Refer to 6C1-1 Engine Management – V6 –
General Information for further information.
1.3 System Operation
Preliminary Information
Enabled and Disabled
The cruise control is enabled / disabled by pressing the cruise control ON–OFF switch mounted on the lower right hand
side of the dash panel. When cruise control is enabled, the cruise control ON–OFF switch illuminates and the cruise
control is ready for a speed to be set (cruise control activated). W hen the cruise control is disabled, the cruise control
cannot be activated.

Cruise Enabled
1 The cruise control ON–OFF switch (1) supplies 12 Volts to the Powertrain Interface Module (PIM) when it
is pressed.
2 The cruise control ON–OFF switch lamp (2) turns on.
Cruise Disabled
1 W hen cruise control ON–OFF switch (1) is pressed again, power is removed from the PIM disabling the
cruise control.
2 The cruise control ON–OFF switch lamp (2) turns off.
Figure 8C – 4

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Cruise Control – HFV6 Page 8C–10
Tech 2 Data List
The Tech 2 displays the status of certain cruise control system input parameters.
To view the data list:
1 Connect Tech 2 to the data link connector (DLC) and turn on the ignition.
2 On Tech 2 select Body / Powertrain Interface Module / Diagnostic Data Display / Data List .
Tech 2 Parameter Units Displayed Typical Display Values
Cruise Cancel Switch Inactive / Active Inactive
Cruise Resume Switch Off / Enabled Off
Cruise Set Switch Inactive / Active Inactive
Cruise Main Switch Inactive / Active Inactive
Cruise Control Set Lamp Off / On Off
Cruise Control On Lamp Off / On Off
3 On Tech 2 select Engine / V6 Engine / Data Display / Data List / Cruise Control Data.
Tech 2 Parameter Units Displayed Typical Display Values
Brake Lamp Switch Inactive / Active Inactive
Initial Brake Apply Sig Inactive / Active Inactive
Cruise Set / Decel Swit Inactive / Active Inactive
Cruise Resume / Accelerat Inactive / Active Inactive
Cruise Control Disengag Engine Speed / Brake Engine Speed
4 On Tech 2 select Engine / V6 Engine / Data Display / Data List / Engine Data 1.
Tech 2 Parameter Units Displayed Typical Display Values
Clutch Pedal Switch Inactive / Active Inactive

2.2 Diagnostic Systems Check
Diagnostic Systems Check
Refer to 2.3 Wiring Diagram to aid in the diagnosis of the cruise control system.
For the cruise control system to work effectively the following systems / components need to be serviceable:
Step Action Yes No
1 Is the fault specifically isolated to this system / module?
Go to Step 2 Go to 6E1
Powertrain Interface Module – V6
2 1 Connect Tech 2 to the DLC.
2 Ignition ON, engine OFF.
3 On Tech 2 select Body / Powertrain Interface Module / Diagnostic Trouble
codes / Read DTCs’.
Are there any set DTC’s? Go to the
appropriate DTC table in 6E1
Powertrain Interface Module – V6. Go to Step 3

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Cruise Control – HFV6 Page 8C–14
2.4 Cruise Control Inoperative /
Malfunctioning
Circuit Description
When the ON-OFF button is pressed, 12 V is applied to the Powertrain Interface Module (PIM) connector B – 97 pin 14.
This enables and disables cruise control operation.
Pressing the cruise control switch assembly to SET–COAST button activates the cruise control at a desired speed above
40 km/h. This provides a 12 V signal to the PIM through connector B – 97 pin 15.
Pressing and holding the cruise control switch to SET–COAST provides a 12 V signal to the PIM at connector B – 97
pin 15. Turning the cruise control switch to RES–ACC will apply a 12 V signal to the PIM at connector B – 97 pin 16.
Turning the cruise control switch to CANCEL will apply a 12 V signal to the PIM at connector B – 97 pin 17.
Pressing the brake pedal opens the cruise Initial Brake Apply Signal circuit thus removing the supply voltage from the
ECM connector C – 56 pin 46. Simultaneously, the stop lamp circuit will close (normally open) and supply 12 V to the
ECM at connector C – 56 pin 10. Both these signals must be present so as to ensure the safe operation of the vehicle’s
cruise cancel function.
Manual Vehicles Only
Pressing the clutch pedal opens the cruise cancel circuit thus removing the supply voltage from the ECM at connector C
– 56 pin 53.
For detailed information refer to 3.4 Clutch Pedal Switch (Manual Only) in this Section.
Test Description
The following numbers refer to the step numbers in the diagnostic table:
4–7 Checks the cruise control switch and associated circuits are functioning correctly.
8–9 Checks the brake pedal switch assembly and associated circuit are functioning correctly.
10 Checks the clutch pedal switch assembly and associated circuits are functioning correctly.
11–21 Covers the testing and replacement of system components.
22–28 Checks for intermittent faults in associated circuits and connectors.
Diagnostic Table Notes
1 For all wiring harness fault diagnoses and repairs, refer to 2.3 W iring Diagrams in this Section.
2 Tech 2 can display a stored history of which system parameter or input caused the cruise control to disengage. This can aid diagnosis of intermittent faults.

Diagnostic Table
Step Action Yes No
1 Did you review the System Operation?
Go to Step 2 Go to 1.3
System Operation
2 Did you read Diagnostic Systems Check ?
Go to Step 3 Go to Diagnostic
Systems Check

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Cruise Control – HFV6 Page 8C–15
Step Action Yes No
3 Check the ignition supply circuits to the Stop Lamp Switch assembly
connector C – 44 pin 1 is serviceable using a multimeter set to
measure voltage, refer to 2.3 W iring Diagrams in this Section
Is there a +12 volt signal present at connector C – 44 pin 1?
Go to Step 4 Replace the faulty
fusible link Main,
IG2 or Stop Light fuse (refer to Note 1).
If either of the
fusible links or fuse blows again, repair
or replace the faulty circuit (refer to
Note 1)
4 1 Connect Tech 2 to the DLC.
2 On Tech 2 select: Body / Powertrain Interface Module / Diagnostic Data
Display.
3 Scroll to Cruise Main Switch.
4 W hile monitoring Tech 2, press the cruise control switch ON– OFF button.
Does Tech 2 display the following:
• Inactive and Active as the cruise control switch is pressed?
Go to Step 5 Go to Step 11
5 1 Scroll to Cruise Resume Switch.
2 While monitoring Tech 2, rotate the cruise control switch.
Does Tech 2 display the following:
• Inactive when the cruise control switch is in the neutral
position?
• Res / Acc when the cruise control switch is rotated to the RES–
ACC. Position? Go to Step 6 Go to Step 12
6
1 Scroll to Cruise Set Switch.
2 W hile monitoring Tech 2, press the cruise control switch.
Does Tech 2 display the following:
• Inactive when the cruise control switch is in the neutral
position?
• Set / Coast when the cruise control switch is pressed to the
SET–COAST position? Go to Step 7 Go to Step 13
7 1 Scroll to Cruise Cancel Switch.
2 While monitoring Tech 2, rotate the cruise control switch.
Does Tech 2 display the following:
• Inactive when the cruise control switch is in the neutral
position?
• Cancel when the cruise control switch is rotated to the CANCEL
position? Go to Step 8 Go to Step 14

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Cruise Control – HFV6 Page 8C–16
Step Action Yes No
8 1 Return to the Main Menu on Tech 2.
2 On Tech 2 select: Engine / V6 Engine / Data Display / Cruise Control Data.
3 Scroll to Brake Lamp Switch.
4 While monitoring Tech 2, press and then release to the brake pedal.
Does Tech 2 display the following:
• Active as the brake pedal is pressed?
• Inactive when the pedal is released? Go to Step 9 Go to Step 15
9 1 Scroll to Initial Brake Apply Sig.
2 While monitoring Tech 2, press and then release to the brake pedal.
Does Tech 2 display the following:
• Inactive when the pedal is released?
• Active as the brake pedal is pressed? Go to Step 10 Go to Step 16
10
NOTE
This procedure is only required on vehicles fitted with
manual transmissions. If the vehicle is fitted with an
automatic transmission, go to Step 24.
1 Scroll to Cruise Control Active .
2 While monitoring Tech 2, press and then release to the clutch pedal.
Does Tech 2 display the following:
• Active when the pedal is released?
• Inactive as the clutch pedal is pressed?
Go to Step 30 Go to Step 17
11 Test the cruise control main switch, refer to 3.1 Cruise Control
Main Switch
Is the cruise control switch serviceable? Go to Step 22 Go to Step 18
12 Test the cruise control switch assembly, refer to 3.2 Cruise Control
Switch Assembly
Is the cruise control switch assembly serviceable? Go to Step 23 Go to Step 18
13 Test the cruise control switch assembly, refer to 3.2 Cruise Control
Switch Assembly
Is the cruise control switch assembly serviceable? Go to Step 24 Go to Step 18
14 Test the cruise control switch assembly, refer to 3.2 Cruise Control
Switch Assembly
Is the cruise control switch assembly serviceable? Go to Step 25 Go to Step 18
15 Test the stop lamp switch assembly, refer to 3.3 Stop Lamp
Switch Assembly.
Is the stop lamp switch serviceable? Go to Step 26 Go to Step 19
16 Test the stop lamp switch assembly, refer to 3.3 Stop Lamp
Switch Assembly.
Is the stop lamp switch serviceable? Go to Step 26 Go to Step 20

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