2007 ISUZU KB P190 battery

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:

BACK TO CHAPTER INDEX
TO MODEL INDEX
ISUZU KB P190 2007

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

BACK TO CHAPTER INDEX
TO MODEL INDEX
ISUZU KB P190 2007

Powertrain Interface Module – V6 Page 6E1–39

6 This step tests the internal GM LAN CAN_HI circuit in the PIM.
7 This step tests the internal GM LAN CAN_LO circuit in the PIM.
DTC U2106 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 U2106.
3 Using Tech 2, select the DTC display function.
Does DTC U2106 fail this ignition cycle? Go to Step 3 Refer to
Additional
Information in this Section
3 Using Tech 2, attempt to communicate with the TCM.
Does Tech 2 communicate with the TCM? Go to Step 9 Go to Step 4
4 Test the following TCM 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 voltage circuit,
• 12 V accessory supply circuit,
• Ignition Control Relay 12 V supply circuit, and
• all TCM ground connections.
Has any fault been found and rectified? Go to Step 10 Go to Step 5
5 Test serial data circuits between the TCM and PIM 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 6
6 1 Disconnect the PIM harness connector.
2 Using a digital multimeter, measure the resistance between the two CAN_LO terminals of the PIM.
NOTE
Refer to 5 GM LAN Serial Communication Circuit and
6 Wiring Diagram and Connector for the appropriate GM
LAN component terminal identification.
Does the digital multimeter display infinity? Go to Step 9 Go to Step 7
7
Using a digital multimeter, measure the resistance between the two
CAN_HI terminals of the PIM.
Does the digital multimeter display infinity? Go to Step 9 Go to Step 8
8
Replace the TCM. Refer to 7C4 Automatic Transmission – 4L60E –
On-vehicle Servicing.
Has the repair been completed? Go to Step 10 —
9 Replace the PIM. Refer to 11.2 Powertrain Interface Module.
Has the repair been completed? Go to Step 10 —

BACK TO CHAPTER INDEX
TO MODEL INDEX
ISUZU KB P190 2007

Powertrain Interface Module – V6 Page 6E1–53

9.13 DTC P0500, P0502 or P0503 – Vehicle
Speed Sensor Signal Malfunction
DTC Descriptors
This diagnostic procedure supports the following DTC’s:
• DTC P0500 – Vehicle speed sensor open circuit, short circuit to battery voltage, short circuit to ground, or
undefined error
• DTC P0502 – Vehicle speed sensor sensor low voltage
• DTC P0503 – Vehicle speed sensor intermittant fault
Circuit Description
The PIM applies the ground to the vehicle speed sensor (VSS) low reference circuit.
The VSS in conjunction with the 40X reluctor wheel generates an AC signal voltage. The amplitude and frequency of the
signal generated is proportional to the vehicle speed. The PIM uses this signal from the VSS signal circuit to determine
the vehicle speed.
A VSS DTC sets if the PIM detects a fault condition in the VSS signal circuit.
Conditions for Running the DTC
DTC P0500
Runs continuously once the following condition is met:
• The ignition is on and the vehicle is stationary.
DTC P0502
Runs continuously once the following condition is met:
• The first time the ignition is on and the vehicle starts to move from the stationary position.
DTC P0503
Runs continuously once the following condition is met:
• The ignition is on and the vehicle is mobile.
Conditions for Setting the DTC
DTC P0500
W hen the PIM reads back the 15 consecutive readings within 0.5 seconds.
DTC P0502
If the reading is >9.1 Km/Hr the DTC will be set.
DTC P0503
The DTC will set when the sensor detects an occurance of 15 times within 0.5 seconds.
Conditions for Clearing DTC
The DTC’s will clear on the next ignition cycle.
Additional Information
• Refer to 7B1_Manual Transmission.

BACK TO CHAPTER INDEX
TO MODEL INDEX
ISUZU KB P190 2007

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.

BACK TO CHAPTER INDEX
TO MODEL INDEX
ISUZU KB P190 2007

Powertrain Interface Module – V6 Page 6E1–66

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.

BACK TO CHAPTER INDEX
TO MODEL INDEX
ISUZU KB P190 2007

Powertrain Interface Module – V6 Page 6E1–68

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 10 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 10 Go to Step 6
6
Measure the frequency at the tachometer signal output from the ECM,
refer to 8A Electrical Body and Chassis.
Is the tachometer frequency present? Go to Step 7 Refer to
6C1-2 Engine Management
Diagnostics
7 Replace the PIM.
Has the repair been completed? Go to Step 10 —
8 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 10 Go to Step 9
9 Replace the instrument cluster.
Has the repair been completed? Go to Step 10 —
10 Start the vehicles engine.
Does the tachometer 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.

BACK TO CHAPTER INDEX
TO MODEL INDEX
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.

BACK TO CHAPTER INDEX
TO MODEL INDEX
ISUZU KB P190 2007