engine ISUZU KB P190 2007 Workshop Repair Manual

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 6E1–23

Pin No. Wire Colour Circuit
Description Function
20 P/L
Cru Cont Sw
Pwr ON Cruise Control Switch Power ON
21 BR/R Batt Battery
Supply
22 B Grd Ground Engine Bay – L/H
23 — — Not Connected
24 G/Y A/T Pwr Dr Sw Auto Transmission Power Drive


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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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Powertrain Interface Module – V6 Page 6E1–26

Step Action Yes No
4
Using Tech 2, attempt to communicate with the PIM.


Does Tech 2 communicate with the PIM? Go to Step 5 Refer to
7.3 Powertrain Interface Module –
Module
Communication Check Failure
Diagnostic Table
5 Using Tech 2, view and record all DTCs.
Does Tech 2 display any DTCs? Go to Step 6 Refer to
Intermittent Fault Conditions.
6 Does DTC C0550 fail this ignition cycle? Refer to
9.1 DTC
C0550 – PIM
Internal Fault
Diagnostic Table Go to Step 7
7 Does DTC U2100 fail this ignition cycle? Refer to
9.2 DTC
U2100 – No
Communication
W ith CAN Bus (High Speed) Diagnostic
Table Go to Step 8
8 Does DTC U2106 fail this ignition cycle? Refer to
9.4 DTC
U2106 – CAN Bus
No Communication
W ith Transmission Control Module Go to Step 9
9
Does DTC U2105 fail this ignition cycle? Refer to
9.3 DTC
U2105 – CAN Bus
No Communication
W ith Engine Control Module Diagnostic
Table Go to Step 10
10 Does Tech 2 display multiple DTCs? Refer to
the DTC Table of
the fault condition
that is most likely to
trigger multiple
DTCs. Refer to
4.1 Diagnostic General
Descriptions for information on
multiple DTCs fault condition Refer to the relevant
DTC table
When all diagnosis and repairs are completed, clear all DTCs and check the system for correct operation.

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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 6E1–29

Intermittent Fault Conditions
8.1 Intermittent Conditions Diagnostic Table
Description
A fault condition is intermittent if one of the following conditions exists:
• The fault condition is not always present.
• The fault condition cannot be presently duplicated.
• There is no Current DTC but a History DTC is stored.
Diagnostic Table
Checks Actions
Preliminary
• Perform the Preliminary Checks, refer to 7.1 Diagnostic Requirements,
Precautions and Preliminary Checks.
• Gather information from the customer regarding the conditions that trigger the
intermittent fault such as:
• At what engine or ambient temperature range does the fault occur?
• Does the fault occur when operating aftermarket electrical equipment inside
the vehicle?
• Does the fault occur on rough roads or in wet road conditions?
• If the intermittent fault is a start and then stall condition, check immobiliser system.
Refer to 11A Immobiliser.
Harness / Connector Install Tech 2 and perform the Tech 2 Intermittent Fault Tests. Refer to 4.1 Diagnostic General Descriptions for information on Tech 2 ECU diagnostic
tests.
W arning Indicator The following conditions may cause an intermittent Malfunction Indicator Lamp fault with
no DTC listed:
• Electromagnetic Interference (EMI) caused by a faulty relay, ECM controlled
solenoid, switch or other external source.
• Incorrect installation of aftermarket electrical equipment such as the following:
• mobile phones,
• theft deterrent alarms,
• lights, or
• radio equipment.
• Loose PIM ground connections.

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Checks Actions
Temperature Related The Tech 2 Freeze Frame / Failure Records or Snapshot data may be used if applicable
to the fault condition. Refer to 4.1 Diagnostic General Descriptions for information on
Tech 2 ECU diagnostic tests.
• If the intermittent fault is heat related, review the Tech 2 data in relationship to the
following:
• high ambient temperature,
• underhood / engine generated heat,
• circuit generated heat due to a poor electrical connection or high electrical
load, and
• higher than normal load conditions (towing, etc.).
• If the intermittent fault is related to cold ambient or engine temperature, review the
Tech 2 data in relationship to the following:
• low ambient temperature, and
• the fault condition that occurs only on a cold start situation.
Additional Tests
• Check for incorrect installation of aftermarket electrical equipment such as the
following:
• mobile phones,
• theft deterrent alarms,
• lights, or
• radio equipment.
• Check for electromagnetic Interference (EMI) caused by a faulty relay, ECM
controlled solenoid or switch. The fault is triggered when the relay or solenoid is
activated.
• Check the A/C compressor clutch and some relays that contain a clamping diode
or resistor for an open circuit.
• Check the generator for a faulty rectifier bridge that may allow A/C noise into the
PIM electrical circuit.
When all diagnosis and repairs are completed, check the engine management system for correct operation.

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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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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 6E1–35

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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