2007 ISUZU KB P190 service

Powertrain Interface Module – V6 Page 6E1–21

6.3 Connector Information
PIM Connector Pin Specifications
Pin Description – Connector B-96

Figure 6E1 – 1

Pin No. Wire Colour Circuit
Description Function
1 P/W
A/T 3 Srt W rg
Lmp Auto Transmission 3rd Start W arning Lamp
2 P
A/T Pwr Dr
W rg Lmp Auto Transmission Power Drive W arning Lamp
3 O/L A/T Oil Tmp
W rg Lmp Auto Transmission Oil Temperature W arning Lamp
4 G/Y
Cru Set W rg
Lmp Cruise Set W arning Lamp
5
O/L SVS W rg Lmp Service Vehicle Soon W arning Lamp
6 W Eng Oil W rg
Lmp Engine Oil Pressure W arning Lamp holidays
7
W /L Batt W rg Lmp Battery Charge W arning Lamp
8 Y/B Eng Tmp Gau Engine Coolant Gauge
9 B/R Tac Gau Tacho Gauge – RW D/4W D (2-4) Control
10 W Imob Sig Immobiliser
11 — — Not Connected
12 — — Not Connected
13 L Sft Sel Pos D Shift Selector Position D
14 R/B Sft Sel Pos N Shift Selector Position N
15 R/Y Sft Sel Pos R Shift Selector Position R
16 Y/V Sft Sel Pos P Shift Selector Position P
17 — — Not Connected
18 G/Y A/T Chk W rg
Lmp Auto Transmission Check W arning Lamp
19 — — Not
Connected
20 — — Not Connected

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Powertrain Interface Module – V6 Page 6E1–24

7 Diagnostics Starting Point
7.1 Diagnostic Requirements, Precautions
and Preliminary Checks
Basic Knowledge Required

A lack of basic understanding of electronics,
electrical wiring circuits and use of electrical
circuit testing tools when performing the PIM
diagnostic procedures could result in
incorrect diagnostic results or damage to
components.
In addition, understanding of the Engine Management System is essential to prevent misdiagnosis and component
damage. Refer to 6C1-1 Engine Management – V6 – General Information.
Basic Diagnostic Tools Required

Use of incorrect electrical circuit diagnostic
tools when performing the PIM diagnostic
procedures could result in incorrect
diagnostic results or damage to components.
The following electrical circuit testing tools are required to perform the diagnostic procedures detailed in this Section:
• Tech 2.
• Test lamp, refer to 8A Electrical - Body and Chassis for further information.
• Digital multimeter with 10 M Ω impedance, refer to 8A Electrical - Body and Chassis for further information.
• Connector test adapter kit Tool No. J35616-A.
Diagnostic Precautions

In addition to the safety and precautionary
measures listed in 11.1 Safety and
Precautionary Measures, the following
diagnostic precautions must be observed
when performing any PIM diagnostic
procedure:
• Use only the test equipment specified in the diagnostic tables. Other test equipment may either give incorrect
results or damage serviceable components.
• Do not clear any DTCs unless instructed.
• The fault must be present when using the DTC Diagnostic Tables. Otherwise, misdiagnosis or replacement of
serviceable parts may occur.
• Always use connector adapters such as those contained in connector test adapter kit Tool No. J35616-A to prevent
connector terminal damage.

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ISUZU KB P190 2007

Powertrain Interface Module – V6 Page 6E1–25

• Thorough inspection of the wiring circuits and connectors listed in the diagnostic procedures must be performed,
otherwise misdiagnosis may occur.
• Inspect the electrical circuitry or connector terminals that are suspected to be causing the complaint for the
following conditions:
• backed-out connector terminals,
• improper wiring connector mating,
• broken wiring connector locks,
• damaged connector terminals, and
• physical damage to the wiring harness.
• Before replacing a component, inspect its connector terminal for corrosion or deformation that may cause the fault
condition.
Preliminary Checks
The PIM preliminary check examines easily accessible components which may cause problems with the PIM. This visual
and physical inspection procedure may quickly identify the fault condition and eliminate the need for additional diagnosis.
• Refer to Service Techlines for relevant information regarding the fault condition.
• Ensure the battery is fully charged.
• Check the battery connections for corrosion or a loose terminal.
• Perform a visual and physical inspection of the following:
• PIM component wiring harness and terminals for proper connections, pinches or cuts, and
• PIM wiring harness routing which may be positioned very close to a high voltage or high current devices such
as aftermarket audio systems.
NOTE
High voltage or high current devices may induce
electrical noise on a circuit, which can interfere
with normal circuit operation.
• The PIM is sensitive to Electro Magnetic Interference (EMI). Check for incorrect aftermarket theft deterrent
devices, lights or mobile phone installations if an intermittent malfunction is suspected.
7.2 Diagnostic System Check
Step Action Yes No
1
Have you met the basic diagnostic requirements listed in the PIM
Diagnostic Starting Point?
Go to Step 2 Refer to
7.1 Diagnostic
Requirements,
Precautions and
Preliminary Checks
2 Have you read the Diagnostic Precautions?
Go to Step 3 Refer to
7.1 Diagnostic Requirements,
Precautions and
Preliminary Checks
3 Have you performed the Preliminary Checks?
Go to Step 4 Refer to
7.1 Diagnostic Requirements,
Precautions and
Preliminary Checks

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Powertrain Interface Module – V6 Page 6E1–27

7.3 Powertrain Interface Module – Module
Communication Check Failure
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 Test the following PIM circuits for a high resistance, open circuit or
short to ground fault condition. Refer to 8A Electrical - Body and
Chassis for information on electrical diagnosis:
• 12 V battery supply circuit,
• 12 V ignition circuit, and
• ground circuit.
Has any fault been found and rectified? Go to Step 10 Go to Step 3
3 1 Disconnect the ECM harness connector.
2 Switch off the ignition for 10 seconds.
3 Using Tech 2, attempt to communicate with the PIM.
NOTE
Other DTCs may set when the ECM connector is
disconnected and the ignition is switched on. Disregard
DTCs that set under this condition on this DTC Table.
Does Tech 2 communicate with the PIM? Go to Step 4 For vehicles with
automatic
transmissions, go to
Step 5. For vehicles with manual
transmission go to Step 8
4 Replace the ECM. Refer to 6C1-3 Engine Management – V6 –
Service Operations.
Has the repair been completed? Go to Step 10 —
5 1 Disconnect the TCM harness connector.
2 Switch off the ignition for 10 seconds.
3 Using Tech 2, attempt to communicate with the PIM.
Does Tech 2 communicate with the PIM? Go to Step 6 Go to Step 8
6 Test serial data circuits between the TCM and ECM for a short to
voltage, short to ground or short together condition.
Has any fault been found and rectified? Go to Step 10 Go to Step 7
7 Replace the TCM. Refer to 7C4 Automatic Transmission – 4L60E –
On-vehicle Servicing.
Has the repair been completed? Go to Step 10 —
8 Test serial data circuits between the PIM and ECM for vehicles with
manual transmission, or between the PIM and TCM for vehicles with
automatic transmission for a high resistance or open circuit fault
condition. Refer to 8A Electrical - Body and Chassis for information on
wiring circuit testing and repair.
Has any fault been found and rectified? Go to Step 10 Go to Step 9
9 Replace the PIM. Refer to 11.2 Powertrain Interface Module.
Has the repair been completed? Go to Step 10 —
10 Using Tech 2, attempt to communicate with the PIM.
Does Tech 2 communicate with the PIM? Go to Step 11 Refer to
7.2 Diagnostic System Check

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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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Powertrain Interface Module – V6 Page 6E1–33

• 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 a short to ground or short to voltage on the GM LAN circuits when the ignition is switched on and the
short condition exists for greater than five seconds.
NOTE
This DTC will only set when the ignition has
initially been turned to the ON position, and will
not set when the vehicle is being driven.
Action Taken When the DTC Sets
• W hen the DTC sets, the following warning lamps are displayed on the instrument cluster:
• Malfunction Indicator Lamp, and
• 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:
3 This step establishes if there is a fault with the ECM.
6 This step tests GM LAN serial data circuits between the TCM and the ECM.
8 This step tests GM LAN serial data circuits between the PIM and ECM (vehicles with manual transmission) or PIM and TCM (vehicles with automatic transmission).
9 This step tests GM LAN serial data circuits between the PIM and the data link connector.

DTC U2100 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

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Powertrain Interface Module – V6 Page 6E1–34

Step Action Yes No
2
1 Switch off the ignition for 10 seconds.
2 Operate the vehicle within the conditions for setting DTC U2100.
3 Using Tech 2, select the DTC display function.
Does DTC U2100 fail this ignition cycle? Go to Step 3 Refer to
Additional
Information in this
Section
3 1 Disconnect the ECM harness connector.
2 Switch off the ignition for 10 seconds.
3 Operate the vehicle within the conditions for setting DTC U2100.
4 Using Tech 2, select the DTC display function and check if DTC U2100 fails this ignition cycle.
NOTE
Other DTCs may set when the ECM connector is
disconnected and the ignition is switched on. Disregard
DTCs that set under this condition on this DTC Table.
Does DTC U2100 fail this ignition cycle? For vehicles with
automatic
transmissions, go to Step 5. For vehicles
with manual
transmission go to Step 8 Go to Step 4
4
Replace the ECM. Refer to 6C1-3 Engine Management – V6 –
Service Operations.
Has the repair been completed? Go to Step 11 —
5 1 Disconnect the TCM harness connector.
2 Switch off the ignition for 10 seconds.
3 Using Tech 2, attempt to communicate with the PIM.
Does Tech 2 communicate with the PIM? Go to Step 6 Go to Step 8
6 Test serial data circuits between the TCM and ECM for a short to
voltage, short to ground or short together condition. Refer to 8A
Electrical - Body and Chassis for information on wiring circuit testing
and repair.
Has any fault been found and rectified? Go to Step 11 Go to Step 7
7
Replace the TCM. Refer to 7C4 Automatic Transmission – 4L60E –
On-vehicle Servicing
Has the repair been completed?. Go to Step 11 —
8 Test serial data circuits between the PIM and ECM for vehicles with
manual transmission, or between the PIM and TCM for vehicles with
automatic transmission for a high resistance or open circuit fault
condition. Refer to 8A Electrical - Body and Chassis for information on
wiring circuit testing and repair.
Has any fault been found and rectified? Go to Step 11 Go to Step 9
9 Test serial data circuits and between the PIM and the data link
connector for a short to voltage, short to ground or short together
condition. Refer to 8A Electrical - Body and Chassis for information on
wiring circuit testing and repair.
Has any fault been found and rectified? Go to Step 11 Go to Step 10
10
Replace the PIM. Refer to 11.2 Powertrain Interface Module.
Has the repair been completed? Go to Step 11 —

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Powertrain Interface Module – V6 Page 6E1–36

• 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 GM LAN serial data circuits and the GM LAN component closest to the ECM.
5 This step tests the integrity of the ECM 12 V ignition circuit and ground connections.
6 This step tests the internal GM LAN CAN_HI circuit in the GM LAN component.
7 This step tests the internal GM LAN CAN_LO circuit in the GM LAN component.
DTC U2105 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 10 seconds.
2 Operate the vehicle within the conditions for setting DTC U2105.
3 Using Tech 2, select the DTC display function.
Does DTC U2105 fail this ignition cycle? Go to Step 3 Refer to
Additional
Information in this
Section
3 Using Tech 2, attempt to communicate with the ECM.
Does Tech 2 communicate with the ECM? Go to Step 10 Go to Step 4
4 Test serial data circuits between the ECM and PIM (vehicles with
manual transmission), or ECM and TCM (vehicles with automatic
transmission) for a high resistance or open circuit fault condition.
Refer to 8A Electrical - Body and Chassis for information on wiring
circuit testing and repair.
Has any fault been found and rectified? Go to Step 11 Go to Step 5
5 Test the following ECM circuits for a high resistance, open circuit or
short to ground fault condition. Refer to 8A Electrical - Body and
Chassis for information on electrical diagnosis:
• 12 V battery supply circuit,
• 12 V accessory supply circuit, and
• all ECM ground connections.
Has any fault been found and rectified? Go to Step 11 Go to Step 6

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