warning ISUZU KB P190 2007 Workshop Repair Manual

Powertrain Interface Module – V6 Page 6E1–45

9.9 DTC B3628 – Cruise Control Set Signal
Malfunction
DTC Description
This diagnostic procedure supports DTC 3598 – Cruise Control Set Switch Stuck.
Circuit Description
The cruise control set switch is a normally open switch that closes when the switch is activated. W hen activated, the
switch supplies signal voltage to the cruise control set signal circuit. The powertrain interface module (PIM) converts the
signal voltage input into serial data, which is used by the engine control module (ECM) to set the vehicle speed.
Additional Information
• Refer to 8C Cruise Control – HFV6 for the following information:
• Cruise control switch description, operation and inspection procedures, and
• Cruise control wiring diagram.
• Refer to 6 W iring Diagram and Connector for the following information:
• PIM connector illustration and terminal assignment, and
• PIM wiring diagram.
• For intermittent fault conditions, refer to Intermittent Fault Conditions.
• Since fault conditions in a wiring connector may trigger DTCs, always test the connectors related to this diagnostic
procedure for shorted terminals or poor wiring connection before replacing any component. Refer to 8A Electrical -
Body and Chassis for information on electrical fault diagnosis.
Conditions for Running the DTC
Conditions for running the DTC are:
• The ignition is switched on.
• The ignition voltage is 10.0 – 16.0 V.
Conditions for Setting the DTC
The PIM detects the cruise control set function of the cruise control switch assembly is in the SET position for 120
seconds or more.
Action Taken When the DTC Sets
W hen the DTC sets, there is no warning lamp displayed on the instrument cluster.
If the cruise control is active at the time the DTC sets, the PIM will disable cruise control.
Conditions for Clearing the DTC
Refer to 4.1 Diagnostic General Descriptions for information on the conditions for clearing DTCs.
NOTE
If the fault is not evident for greater than 120
seconds, the DTC will become a history DTC and
cruise control can be resumed.
Test Description
The following numbers refer to the step numbers in the diagnostic table:
2 This step tests the cruise control set switch using Tech 2.

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ISUZU KB P190 2007

Powertrain Interface Module – V6 Page 6E1–47

signal voltage input into serial data, which is used by the engine control module (ECM) to enable or disable the cruise
control system, and by the instrument cluster to display cruise control status.
Additional Information
• Refer to 8C Cruise Control – HFV6 for the following information:
• Cruise control switch description, operation and inspection procedures, and
• Cruise control wiring diagram.
• Refer to 6 W iring Diagram and Connector for the following information:
• PIM connector illustration and terminal assignment, and
• PIM wiring diagram.
• For intermittent fault conditions, refer to Intermittent Fault Conditions.
• Since fault conditions in a wiring connector may trigger DTCs, always test the connectors related to this diagnostic
procedure for shorted terminals or poor wiring connection before replacing any component. Refer to
8A Electrical - Body and Chassis for information on electrical fault diagnosis.
Conditions for Running the DTC
Conditions for running the DTC are:
• The ignition is switched on.
• The ignition voltage is 10.0 – 16.0 V.
Conditions for Setting the DTC
The PIM detects the cruise control on / off function of the cruise control on/off switch is in the ON position for 120
seconds or more.
Action Taken When the DTC Sets
W hen the DTC sets, there is no warning lamp displayed on the instrument cluster.
If the cruise control is active at the time the DTC sets, the PIM will disable cruise control.
Conditions for Clearing the DTC
Refer to 4.1 Diagnostic General Descriptions for information on the conditions for clearing DTCs.
NOTE
If the fault is not evident for greater than 120
seconds, the DTC will become a history DTC and
cruise control can be resumed.
Test Description
The following numbers refer to the step numbers in the diagnostic table:
2 This step tests the cruise control on / off switch using Tech 2.
6 This step tests the cruise control on / off switch signal circuit.

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Powertrain Interface Module – V6 Page 6E1–51

Additional Information
• Refer to 6 W iring Diagram and Connector Chart for the following information:
• PIM connector illustration and terminal assignment, and
• PIM wiring diagram.
• For intermittent fault conditions, refer to Intermittent Fault Conditions.
• Since fault conditions in a wiring connector may trigger DTCs, always test the connectors related to this diagnostic
procedure for shorted terminals or poor wiring connection before replacing any component. Refer to
8A Electrical - Body and Chassis for information on electrical fault diagnosis.
Conditions for Running the DTC
Conditions for running the DTC are:
• The ignition is switched on.
• The ignition voltage is 10.0 – 16.0 V.
Conditions for Setting the DTC
The DTC will set when the PIM detects a low voltage of <0.41 volts for one second.
The DTC will set when the PIM detects a high voltage of >4.59 volts for one second.
Action Taken When the DTC Sets
W hen the DTC sets, there is no warning lamp displayed on the instrument cluster.
Conditions for Clearing the DTC
The DTC is cleared at the next ignition cycle.
Refer to 4.1 Diagnostic General Descriptions for information on the conditions for clearing DTCs.
Test Description
The following numbers refer to the step numbers in the diagnostic table:
2 This step tests the vertical acceleration sensor using Tech 2.
6 This step tests the ground circuit.

Vertical Acceleration Sensor Diagnostic Table
Step Action Yes No
1
Has the Diagnostic System Check been performed?
Go to Step 2 Refer to additional
information
2 1 Switch off the ignition for 30 seconds.
2 Start the engine.
3 Using Tech 2, select the DTC display function.
Does DTC P0318 fail this ignition cycle? Go to Step 3 Refer to
Additional
Information in this DTC
3 1 Switch on the ignition with the engine not running.
2 Using a digital multimeter, measure the voltage between the VAS reference circuit and a good ground. Refer to 6 W iring
Diagram and Connector Chart.
Does the multimeter display approximately 5.0 V? Go to Step 4 Go to Step 7

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Powertrain Interface Module – V6 Page 6E1–58

• For intermittent fault conditions, refer to Intermittent Fault Conditions.
• Since fault conditions in a wiring connector may trigger DTCs, always test the connectors related to this diagnostic
procedure for shorted terminals or poor wiring connection before replacing any component. Refer to 8A Electrical -
Body and Chassis for information on electrical fault diagnosis.
Conditions for Running the DTC
Conditions for running the DTC are:
• The ignition is switched on.
• The ignition voltage is 10.0 – 16.0 V.
Conditions for Setting the DTC
An incorrect security code is entered into Tech 2 when attempting to program the PIM.
Action Taken When the DTC Sets
W hen the DTC sets, the following action is taken:
• The vehicle will not start whilst the PIM is in a lock-out state.
NOTE
When the DTC sets, there is no warning lamp
displayed on the instrument cluster.
Conditions for Clearing the DTC
Refer to 4.1 Diagnostic General Descriptions for information on the conditions for clearing DTCs.
Test Description
The following number refers to the step numbers in the diagnostic table:
4 This step tests the PIM ground circuits and supply voltage.
DTC P1611 Diagnostic Table
Step Action Yes No
1
Has the Diagnostic System Check been performed?
Go to Step 2 Refer to
7.2 Diagnostic System Check
2 1 Switch off the ignition for 30 seconds.
2 Using Tech 2, select the DTC display function.
NOTE
Do not attempt to perform any Tech 2 function that
requires the PIM security code to be entered.
Does DTC P1611 fail this ignition cycle? Go to Step 5 Go to Step 3
3 Using Tech 2, attempt a programming function that requires the PIM
security code to be entered. Refer to 12 PIM Security and
Programming.
Has the programming function been successfully performed? System OK Go to Step 4

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Conditions for Setting the DTC
The PIM detects the power mode switch is activated for 120 seconds or more.
Action Taken When the DTC Sets
W hen the DTC sets, there is no warning lamp displayed on the instrument cluster.
Conditions for Clearing the DTC
Refer to 4.1 Diagnostic General Descriptions for information on the conditions for clearing DTCs.
Test Description
The following numbers refer to the step numbers in the diagnostic table:
2 This step tests the power mode switch using Tech 2.
6 This step tests the power mode switch signal circuit.
DTC B0980 Diagnostic Table
Step Action Yes No
1
Has the Diagnostic System Check been performed?
Go to Step 2 Refer to
7.2 Diagnostic
System Check
2 Using Tech 2, view the power mode switch status parameter in the
PIM data list.
Does Tech 2 display Power?
Go to Step 4 Go to Step 3
3
1 Switch off the ignition for 10 seconds.
2 Operate the vehicle within the conditions for setting DTC B0980.
3 Using Tech 2, select the DTC display function.
Does DTC B0980 fail this ignition cycle? Go to Step 4 Refer to
Additional
Information in this
Section
4 1 Disconnect connector S22 – X1 from the power mode switch.
2 Using Tech 2, view the power mode switch status parameter in the PIM data list.
Does Tech 2 display Power?
Go to Step 6 Go to Step 5
5
Replace the power mode switch. Refer to 10 Cab.
Has the repair been completed? Go to Step 8 —
6 Test the power mode switch ground signal circuit for a short to ground.
Refer to 8A Electrical - Body and Chassis for information on electrical
fault diagnosis.
Has any fault been found and rectified? Go to Step 8 Go to Step 7
7
Replace the PIM. Refer to 11.2 Powertrain Interface Module.
Has the repair been completed? Go to Step 8 —
8 1 Using Tech 2, clear the DTCs.
2 Switch off the ignition for 30 seconds.
3 Start the engine.
4 Operate the vehicle within the conditions for running the DTC.
Does DTC B0980 fail this ignition cycle? Go to Step 2 Go to Step 9

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Powertrain Interface Module – V6 Page 6E1–64

Step Action Yes No
12
Test the following instrument cluster circuits for a high resistance,
open circuit or short to ground fault condition:
• all 12 V battery supply circuits
• all instrument cluster ground connections
W as any fault found and rectified? Go to Step 15 Go to Step 13
13 Replace the instrument cluster.
Has the repair been completed? Go to Step 15 —
14 Replace the PIM.
Has the repair been completed? Go to step 15 —
15 1 Turn the ignition to the ON position.
2 Move the gear select lever through each gear position and check the PRND32L display.
Does each indicator display an off to on condition? System OK Go to step 2
When all diagnosis and repairs are completed, clear all DTCs and check the system for correct operation.
10.2 Warning Signal and Status Indicators Diagnostics
Circuit Description
The powertrain interface module (PIM) is connected to the instrument cluster by a series of hard wired connections to
illuminate the appropriate warnings and indicators within the instrument cluster. Some of these components do not set a
DTC, in the event of a component failure. The following diagnostic procedures are devised to assist in these cases.
Additional Information
• Refer to 7.2 Diagnostic System Check to monitor DTC’s.
• Refer to 8A Electrical Body and Chassis for the following information:
• Automatic transmission PRND32L switch and wiring,
• TCM wiring diagram.
• Refer to 6 W iring Diagram and Connector Chart for the following information:
• PIM connector illustration and terminal assignment, and
• PIM wiring diagram.
• For intermittent faults, refer to Intermittent Fault Conditions.
• Check for an intermittent fault in the wiring harness or connectors, if a fault cannot be found the system is
serviceable.
Test Description
The following numbers refer to the step numbers in the diagnostic table:
1 This step tests for DTC’s in the overall system.
2 This step manually tests the warning indicators.
5 This step uses Tech 2 to drive each status indicator on.
6 This step uses Tech 2 to drive each warning indicator on.
9 This step tests the wiring harness between the PIM and the Instrument Cluster.

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Hard-wired Warning Signals
Display Indicator
CHECK TRANS Lamp
3rd START Lamp
POW ER Lamp
A/T OIL TEMP Lamp
CRUISE SET Lamp
OIL Lamp
THERMO Gauge
SVS Lamp
CHARGE Lamp
TACHO Gauge
Warning Signal and Status Indicator Diagnostic Table
Step Action Yes No
1
Has the Diagnostic System Check been performed?
Go to Step 2 Refer to
Additional
Information
2 Turn the Ignition to the ON position, observe if all warning and status
indicators illuminate during the Instrument Cluster start up sequence.
Do all indicators illuminate? Go to Step 3 Go to step 4
3 1 Start the vehicles engine.
2 Are any of the warning or status indicators permanently illuminated? Go to Step 7 Go to Step 4
4 Using Tech 2.
Are any DTC’s set which may cause incorrect operation of the warning
or status indicators? Refer to the
relevant DTC’s section Go to Step 5
5
1 Using Tech 2 select,
Body / PIM / Miscellaneous Tests / Status Indicators.
2 Select and activate in turn Cruise Control ON Lamp / Cruise
Control Set Lamp / Power Drive Lamp.
Does each indicator illuminate? Go to Step 6 Go to Step 8
6
1 Using Tech 2 select,
Body / PIM / Miscellaneous Tests / Warnings.
2 Select and activate in turn, ALT / Oil Pressure / Service Soon /
A/T Oil Temp / Check Trans.
Does each warning illuminate? Go to Step 15 Go to Step 8
7 Disconnect the PIM harness connector. Refer to 11.2 Powertrain
Interface Module in this section.
Is the indicator/warning in Step 3 still permanently illuminated? Go to Step 9 Go to Step 12
8 Remove and test the lamp from the malfunctioning warning.
W as the lamp found to be faulty and replaced? Go to Step 15 Go to Step 14

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Step Action Yes No
9
Test for high resistance, open circuit, a short to ground of the relevant
circuits from the PIM to the instrument cluster. Refer to 6 W iring
Diagram and Connector Chart.
W as any fault found and rectified? Go to Step 16 Go to step 10
10
Turn the ignition to the ON position, test for a short to voltage of the
relevant circuits from the PIM to the instrument cluster. Refer to 6
W iring Diagram and Connector Chart.
W as any fault found and rectified? Go to Step 16 Go to Step 11
11
Disconnect the PIM.
Test for a short to voltage of the relevant circuits from the PIM to the
instrument cluster.
W as any fault found and rectified? Go to Step 13 Go to Step 12
12 Disconnect the instrument cluster.
Test for a short to voltage of the relevant circuits from the PIM to the
instrument cluster.
W as any fault found and rectified? Go to Step 16 Go to Step 14
13 Replace the PIM.
Has the repair been completed? Go to Step 16 —
14 Test the following instrument cluster circuits for a high resistance,
open circuit or short to ground fault condition:
• all 12 V battery supply circuits
• all instrument cluster ground connections
W as any fault found and rectified? Go to Step 16 Go to Step 15
15 Replace the instrument cluster.
Has the repair been completed? Go to Step 16 —
16 Turn the Ignition to the ON position, observe if all warning indicators
illuminate during the Instrument Cluster start up sequence.
Do all indicators function correctly? System serviceable Go to step 3
When all diagnosis and repairs are completed, clear all DTCs and check the system for correct operation.

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11 Service Operations
11.1 Safety and Precautionary Measures

The following safety and precautionary
measures must be followed when servicing
and diagnosing the powertrain interface
module (PIM) System. Otherwise, personal
injury and / or improper braking system
operation may occur:
• W hen using electric welding equipment, disconnect the wiring harness connector from the PIM.
• Never disconnect or reconnect the PIM wiring harness connector when the ignition is switched ON.
• Do not touch the PIM connector pins or soldered components on the PIM circuit board to prevent possible
Electrostatic Discharge damage.
• To avoid wiring connector terminal damage, always use suitable wiring harness test leads (such as those in Tool
No, J35616) when performing tests on the PIM wiring connector.
• The PIM is extremely sensitive to Electro Magnetic Interference (EMI). Ensure the PIM wiring harness is routed
correctly and securely fitted to mounting clips when performing service procedures.
• Due to the sensitive nature of the PIM circuitry, specific wiring repair procedures have been developed. These
procedures and instructions are detailed in 8A Electrical - Body and Chassis and are the only recommended and
approved wiring repair methods.
• Ensure that all wiring harness connectors are seated correctly.
• Never disconnect the battery from the vehicle electrical system while the engine is running.
• Always disconnect the battery from the vehicle electrical system before charging.
• Do not use a fast charger for starting the vehicle.
• Ensure the battery cable terminals are secure.
• Before installing a new PIM, ensure the correct type is fitted. Always refer to the latest spare parts information.
11.2 Powertrain Interface Module

Do not touch the powertrain interface module
pins as Electrostatic Discharge (ESD) damage
may result. For further information on ESD,
refer to 1.2 Warning Caution and Notes.

When replacing the PIM, the PIM must be
reset prior to removal. Failure to perform this
procedure will result in the inability to:
• Test the PIM for warranty purposes.
• Install the PIM into other vehicles.

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F2: Snapshot Options
In this test mode, Tech 2 captures data before and after a snapshot triggering event that may or may not set a DTC.
Trigger Type : Manual Trigger
F0: Manual Trigger

Trigger Point : Centre
F4: Beginning
F5: Centre
F6: End

F3: Miscellaneous Tests
F0: Warnings
F1: Status Indicators
F2: Gauge Control Tests

F4: Additional Functions
W hen this selection is made from the Tech 2 screen, an additional choice is provided:
F0: Read PIM Information

F5: Program
W ithin this selection, there are two programming selections available:
F0: Program Variant Configuration
F1: Program VIN

F6: Security
F0: Immobiliser Link To ECM/PIM
F1: Reset PIM
F2: Security Information


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