2007 ISUZU KB P190 key

Powertrain Interface Module – V6 Page 6E1–12

3 Component Description and
Operation
3.1 Powertrain Interface Module
The powertrain interface module (PIM) is located behind the
right-hand lower hinge pillar trim.
Figure 6E1 – 5

The PIM performs the following functions:
• The PIM acts as the communication gateway between the GM LAN communications protocol and keyword 2000
protocol.
• The PIM converts analogue signals from the cruise control switches into digital serial data.
• The PIM upon inputs received from the engine control module (ECM), transmission control module (TCM) and
immobiliser control unit (ICU) controls the operation of the following instruments and warning lamps:
• Speedometer
• Tachometer
• Check Transmission Lamp
• 3
rd Gear Start Lamp
• Power Mode Switch Lamp
• Automatic Transmission Oil Temp Lamp
• Cruise Set Lamp
• Oil Pressure Lamp
• Service Vehicle Soon (SVS) Lamp
• Charge W arning Lamp
• PRNDL Lamps
• The PIM is responsible for authenticating the immobiliser control unit (ICU) prior to the engine control module
(ECM) authenticating the PIM. If any of these authentication processes fail, the vehicle will not start. For further
information on the immobiliser system, refer to 11A Immobiliser System.

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ISUZU KB P190 2007

Powertrain Interface Module – V6 Page 6E1–31

9 DTC Tables
9.1 DTC C0550 – PIM Internal Fault
DTC Description
This diagnostic procedure supports the following DTCs:
• DTC C0550 – EEPROM Error.
• DTC C0550 – Internal Control Module Read Only Memory (ROM Error).
• DTC C0550 – Internal Control Module Random Access Memory (RAM) Error.
Circuit Description
The powertrain interface module (PIM) is the control centre for the communication language conversion between GM
LAN serial data and keyword 2000 serial data. If there is an internal microprocessor integrity fault condition with the PIM,
DTC C0550 will set.
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
An internal PIM fault exists.
Action Taken When the DTC Sets
The action taken when any of these DTCs set will depend on the severity of the error. This may vary from no visual or
audible warnings to a Malfunction Indicator Lamp and / or Service Vehicle Soon 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 checks if the DTC is current, and if so, indicates the PIM has an internal problem.
3 This step checks the PIM ground and 12 V battery supply.

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ISUZU KB P190 2007

Powertrain Interface Module – V6 Page 6E1–32

DTC C0550 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 Operate the vehicle within the conditions for setting DTC C0550.
3 Using Tech 2, select the DTC display function.
Does C0550 fail this ignition cycle? Go to Step 3 Refer to
Additional
Information in this Section
3 1 Test all ground circuits of the PIM for a high resistance or an
open circuit fault condition. Refer to 8A Electrical - Body and
Chassis for information on electrical fault diagnosis.
2 Test the PIM fuses and replace as required. Refer to 8A Electrical-Body and Chassis.
3 Test the PIM battery supply voltage circuit for a high resistance, open circuit or short to ground fault condition. Refer to 8A
Electrical - Body and Chassis for information on electrical fault
diagnosis.
Has any fault been found and rectified? Go to Step 5 Go to Step 4
4 Replace the PIM. Refer to 11.2 Powertrain Interface Module.
Has the repair been completed? Go to Step 5 —
5 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 C0550 fail this ignition cycle? Go to Step 2 Go to Step 6
6 Using Tech 2, select the DTC display function.
Does Tech 2 display any DTCs? Go to the
appropriate DTC
Table System OK
When all diagnosis and repairs are completed, clear all DTCs and check the system for correct operation.
9.2 DTC U2100 – No Communication With CAN Bus (High Speed)
DTC Description
This diagnostic procedure supports DTC U2100 – CAN Bus-off.
Circuit Description
The transmission control module (TCM) and engine control module (ECM) transmit and receive data using the GM LAN
serial data protocol, while the immobiliser control unit (ICU) uses Keyword 2000 serial data protocol.
As the GM LAN and keyword 2000 protocols are not compatible, a powertrain interface module (PIM) is integrated into
the serial data system to enable communication between the two different protocols. The PIM also integrates with the
instrument cluster assembly.
The PIM will detect if a short to ground or a short to voltage condition occurs on GM LAN circuits. If either of these
conditions occur, DTC U2100 sets.
Additional Information
• Refer to 6 W iring Diagram and Connector for the following information:

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ISUZU KB P190 2007

Powertrain Interface Module – V6 Page 6E1–35

Step Action Yes No
11
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 U2100 fail this ignition cycle? Go to Step 2 Go to Step 12
12
Using Tech 2, select the DTC display function.
Does Tech 2 display any DTCs? Go to the
appropriate DTC Table System OK
When all diagnosis and repairs are completed, clear all DTCs and check the system for correct operation.
9.3 DTC U2105 – CAN Bus No
Communication With Engine Control
Module
DTC Description
This diagnostic procedure supports DTC U2105 – CAN Bus No Communication From ECM (Engine Control Module).
Circuit Description
The transmission control module (TCM) and engine control module (ECM) transmit and receive data using the GM LAN
serial data protocol, while the immobiliser control unit (ICU) uses Keyword 2000 serial data protocol.
As the GM LAN and keyword 2000 protocols are not compatible, a powertrain interface module (PIM) is integrated into
the serial data system to enable communication between the two different protocols. The PIM also integrates with the
instrument cluster assembly.
The PIM continuously receives messages from the ECM. If the PIM does not receive a message within a predetermined
time, DTC U2105 sets.
Additional Information
• Refer to 6 W iring Diagram and Connector for the following information:
• PIM connector illustration and terminal assignment, and
• PIM wiring diagram.
• Refer to 6C1-2 Engine Management – V6 – Diagnostics for diagnostic information.
• 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 does not receive a message from the ECM for 100 milliseconds.
Action Taken When the DTC Sets
• W hen the DTC sets, the following warning lamps may be displayed on the instrument cluster:

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ISUZU KB P190 2007

Powertrain Interface Module – V6 Page 6E1–38

9.4 DTC U2106 – CAN Bus No
Communication With Transmission
Control Module
DTC Description
This diagnostic procedure supports DTC U2106 – CAN Bus No Communication W ith TCM (Transmission Control
Module).
Circuit Description
The transmission control module (TCM) and engine control module (ECM) transmit and receive data using the GM LAN
serial data protocol, while the immobiliser control unit (ICU) uses Keyword 2000 serial data protocol.
As the GM LAN and keyword 2000 protocols are not compatible, a powertrain interface module (PIM) is integrated into
the serial data system to enable communication between the two different protocols. The PIM also integrates with the
instrument cluster assembly.
The PIM continuously receives messages from the TCM. If the PIM does not receive a message within a predetermined
time, DTC U2106 sets.
Additional Information
• 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 does not receive a message from the TCM for 1000 milliseconds, during the current ignition cycle.
Action Taken When the DTC Sets
• W hen the DTC sets, the following warning lamps may be displayed on the instrument cluster:
• Malfunction Indicator Lamp,
• Service Vehicle Soon.
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:
4 This step tests the TCM power and ground circuits.
5 This step tests GM LAN serial data circuits between the TCM and the PIM.

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Powertrain Interface Module – V6 Page 6E1–63

PRND32L Display Diagnostic Table
Step Action Yes No
1
Has the Diagnostic System Check been performed?
Go to Step 2 Refer to
Diagnostic
System Check in this section
2 1 Turn the ignition to the ON position.
2 Move the gear select lever through each gear position and check the instrument cluster PRND32L display.
Does each indicator display an off to on condition? Refer to Additional
Information in this section Go to Step 3
3
Are any of the indicators permanently illuminated? Go to Step 5 Go to Step 4
4 1 Using Tech 2 select,

Body / PIM / Miscellaneous Tests / Status Indicators /
PRNDL Lamps.
2 Using the Tech 2 soft keys step through the sequence of illuminating each PRND32L indicator in turn.
Does each indicator display an off to on condition? Go to Step 8 Go to Step 10
5
Disconnect the TCM harness connector. Refer to 7C4 Automatic
Transmission – 4L60E – On-vehicle Servicing.
Is the indicator in Step 3 still permanently illuminated? Go to Step 6 Go to Step 8
6 Disconnect the PIM harness connector. Refer to 11.2 Powertrain
Interface Module in this Section.
Is the indicator in Step 3 still permanently illuminated? Go to Step 7 Go to Step 14
7
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 15 Go to step 12
8
Check the neutral start and back-up lamp switch and automatic
transmission for correct operation. Refer to 7C2 Automatic
Transmission – 4L60E – Electrical Diagnosis.
W as any fault found and rectified? Go to Step 15 Go to 9
9 Replace the TCM. Refer to 7C4 Automatic Transmission – 4L60E –
On-vehicle Servicing.
Has the repair been completed? Go to Step 15 —
10 1 Disconnect the instrument cluster harness connector.
2 Turn the ignition to the ON position.
3 W hile sequencing each PRND32L indicator, back probe the relevant connector pins at the rear of the instrument cluster.
Refer to 6 W iring Diagram and Connector Chart.
Does the multimeter display a change from 0 to 10 Volts as each
PRND32L indicator position is selected? Go to Step 12 Go to 11
11 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 15 Go to Step 14

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Powertrain Interface Module – V6 Page 6E1–67

10.3 Tachometer Diagnostics
Circuit Description
The powertrain interface module (PIM) receives the tachomer signal from the engine control module (ECM), it is then
sent to the instrument cluster by the PIM via a hard wired connection to drive the tachometer which displays the engine
RPM. 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:
• ECM 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.
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.
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 uses the instrument cluster self test to check the function of the tachometer.
3 This step uses Tech 2 to drive the tachometer.
6 This step tests for tachometer drive frequency.
10 This step tests the in-vehicle function of the tachometer.
Tachometer Diagnostic Table
Step Action Yes No
1
Has the Diagnostic System Check been performed?
Go to Step 2 Refer to
Additional
Information
2 Test the function of the tachometer using the instrument cluster self
diagnostic test procedure, refer to 8A Electrical Body and Chassis.
Does the tachometer display 3000 RPM? Go to Step 3 Go to Step 7
3 1 Using Tech 2 select,

Body / PIM / Miscellaneous Tests / Gauge Control Tests /
Tachometer.
2 Using the Tech 2 soft keys step the tacho through different RPM ranges.
Does the tachometer respond to the Tech 2 commands? Go to Step 5 Go to Step 4

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ISUZU KB P190 2007

Powertrain Interface Module – V6 Page 6E1–70

Temperature Gauge Diagnostic Table
Step Action Yes No
1
Has the Diagnostic System Check been performed?
Go to Step 2 Refer to
Additional
Information
2 Test the function of the temperature gauge using the instrument
cluster self diagnostic test procedure, refer to 8A Electrical Body and
Chassis.
Does the temperature gauge display a mid point reading on the dial? Go to Step 3 Go to Step 9
3
1 Using Tech 2 select,

Body / PIM / Miscellaneous Tests / Gauge Control Tests /
Temperature Gauge.
2 Using the Tech 2 soft keys step the temperature gauge through the different ranges.
Does the temperature gauge respond to the Tech 2 commands? Go to Step 6 Go to Step 4
4 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 11 Go to Step 5
5 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 11 Go to Step 6
6
Using Tech 2 select,

Body / ECM / Diagnostic Trouble Codes.
Are any DTC’s set that will effect the operation of the temperature
gauge? Go to Step 7 Go to Step 8
7 W as any fault found and rectified? Go to Step 11 —
8 Replace the PIM.
Has the repair been completed? Go to Step 11 —
9 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 11 Go to Step 10
10 Replace the instrument cluster.
Has the repair been completed? Go to Step 11 —
11 Start the vehicles engine.
Does the temperature gauge function normally? System OK Go to Step 2
When all diagnosis and repairs are completed, clear all DTCs and check the system for correct operation.

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