ECU ISUZU KB P190 2007 Workshop Repair Manual

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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Powertrain Interface Module – V6 Page 6E1–30

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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Powertrain Interface Module – V6 Page 6E1–49

9.11 DTC B3902 – Immobiliser Malfunction
DTC Descriptors
This diagnostic procedure supports DTC B3902 – Immobiliser Malfunction.
Circuit Description
The engine control module (ECM), the powertrain interface module (PIM) and the immobiliser control unit (ICU) are
integral parts of the vehicle immobiliser system. The immobiliser system authenticates the security code programmed
into each of these modules to prevent unauthorised vehicle operation. This authentication process includes the following
steps:
1 At predetermined situations, the ICU sends a security code to the PIM.
2 W hen the ignition is switched ON, the PIM receives and compares this security code from the ICU against the security code programmed into the PIM.
3 Once the PIM receives the correct security code from the ICU, it sends a security code to the ECM.
4 The ECM receives and compares this security code from the PIM against the security code programmed into the ECM.
5 The authentication process is complete once the ECM receives the correct security code from the PIM within the specified time frame.
6 The ECM allows normal vehicle operation.
NOTE
If any of these authentication processes fail, the
vehicle will not start and DTCs will set. For further
information on the immobiliser system, refer to
11A Immobiliser.
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
B3902
Ignition set to the ON position.
Conditions for Clearing the DTC
Refer to 4.1 Diagnostic General Descriptions for information on the conditions for clearing DTCs.
Additional Information
• Refer to 6C1-1 Engine Management –V6 – General Information for details of the ECM operation.
• Refer to 11A Immobiliser for immobiliser system information:
• Refer to 12.4 Immobiliser Link to ECM / PIM for immobiliser link to ECM / PIM.
• Since a fault condition 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.
• For an intermittent fault condition, refer to Intermittent Fault Conditions in this section.

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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.

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Powertrain Interface Module – V6 Page 6E1–55

Step Action Yes No
7
Test the VSS signal circuit and low reference circuit for a high
resistance, open circuit, short to ground, short to voltage or shorted
together fault condition. Refer to 8A Electrical - Body and Chassis for
information on electrical fault diagnosis.
W as any fault found and rectified? Go to Step 11 Go to Step 10
8
Repair the open or high resistance fault condition in the VSS ground
shield circuit. Refer to 8A Electrical - Body and Chassis for information
on electrical repair procedures.
W as the repair completed? Go to Step 11 —
9 Replace the VSS. Refer to 7B1_Manual Transmission.
W as the repair completed? Go to Step 11 —
10 Replace the PIM. Refer to 11.2 Powertrain Interface Module.
W as the repair completed? Go to Step 11 —
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 any of the VSS circuit DTCs 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 in this Section System OK
When all diagnosis and repairs are completed, check the system for correct operation.
9.14 DTC P0633 – Immobiliser Function Not
Programmed
DTC Descriptors
This diagnostic procedure supports DTC P0633 – Immobiliser Function Not Programmed.
Circuit Description
The engine control module (ECM), the powertrain interface module (PIM) and the immobiliser control unit (ICU) are
integral parts of the vehicle immobiliser system. The immobiliser system authenticates the security code programmed
into each of these modules to prevent unauthorised vehicle operation. This authentication process includes the following
steps:
1 At predetermined situations, the ICU sends a security code to the PIM.
2 W hen the ignition is switched ON, the PIM receives and compares this security code from the ICU against the security code programmed into the PIM.
3 Once the PIM receives the correct security code from the ICU, it sends a security code to the ECM.
4 The ECM receives and compares this security code from the PIM against the security code programmed into the ECM.
5 The authentication process is complete once the ECM receives the correct security code from the PIM within the specified time frame.
6 The ECM allows normal vehicle operation.

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Powertrain Interface Module – V6 Page 6E1–57

Step Action Yes No
5
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 ignition 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 7 Go to Step 6
6 Replace the PIM. Refer to 11.2 Powertrain Interface Module.
Has the repair been completed? Go to Step 7 —
7 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.
Do any of the immobiliser DTCs fail this ignition cycle? Go to Step 2 Go to Step 8
8
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.
9.15 DTC P1611 – Wrong Security Code
Entered
DTC Description
This diagnostic procedure supports DTC P1611 – W rong Security Code Entered.
Circuit Description
Tech 2 is used to program the powertrain interface module (PIM). Before any programming, a security code must be
entered into Tech 2. The PIM will check if the code entered is correct before continuing. If the security code is incorrect,
DTC P1611 sets.
After an incorrect security code is entered, the PIM prevents any further attempts to enter a code until a predetermined
wait time elapses. There are several wait time stages, and for each stage, an incorrect security code may be entered
three times before the lockout time is escalated to the next stage. The lockout stages are as follows:
• Stage 1 wait time is 10 seconds.
• Stage 2 wait time is 10 seconds.
• Stage 3 wait time is 10 minutes.
• Stage 4 wait time is 20 minutes.
• Stage 5 wait time is 40 minutes.
• Stage 6 wait time is 80 minutes.
Additional Information
• Refer to 12.4 Immobiliser Link to ECM / PIM for PIM Security Code.
• Refer to 6 W iring Diagram and Connector for the following information:
• PIM connector illustration and terminal assignment, and
• PIM wiring diagram.

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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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Powertrain Interface Module – V6 Page 6E1–71

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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Powertrain Interface Module – V6 Page 6E1–73

11.3 Vertical Acceleration Sensor
Remove
1 Turn the ignition switch off.
2 Using a hoist raise the vehicle to a suitable working height.
3 Remove the VAS connector.
4 Remove the nut (1) securing the VAS to the mounting bracket.
5 Remove the VAS (2) from the mounting bracket.
Figure 6E1 – 17
Reinstall
Reinstallation of the VAS is the reverse of the removal procedure, noting the following:
1 Tighten the attaching nut to the correct torque specification.
VAS attaching nut
torque specification .................................12.0 – 16.0 Nm
2 Check the system for correct operation, refer to 7.2 Diagnostic System Check.
3 Road test the vehicle and check for correct vehicle operation.

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Powertrain Interface Module – V6 Page 6E1–74

12 PIM Security and Programming
12.1 Security and Programming Information
Car Pass Card
W hen performing certain powertrain interface module (PIM) programming functions using Tech 2, you may be prompted
to enter a four digit Security Code (1). This information is found on the car pass card issued with the vehicle when new. If
the card is unavailable, contact the GM Holden Technical Assistance (TAS) centre to obtain the relevant Security Code.
Security Code
The security code is required when performing certain PIM, ICU and ECM programming functions. W hen Tech 2
requests the security code to be entered, and an incorrect code is entered, the PIM will go into a security wait time stage.
This wait time stage will prevent any further attempts to enter the security code until the wait time has elapsed.
Should a second incorrect security code be entered after the initial wait time has elapsed, the PIM will go into a second
wait time stage. The wait time will increase each time an incorrect code is entered. W hen the correct code is entered the
wait time will reset back to its original value of 10 seconds.
NOTE
The ignition switch must be in the ON position
with the battery connected during the wait time
period.
The wait time stages are as follows:
• Stage 1 = 10 seconds.
• Stage 2 = 10 seconds.
• Stage 3 = 10 minutes.
• Stage 4 = 20 minutes.
• Stage 5 = 40 minutes.
• Stage 5 = 80 minutes.

Tech 2 PIM Security Information Data List
The Tech 2 PIM Security Information Data List displays the PIM's current security status.
To view the data list:
1 Connect Tech 2 to the data link connector (DLC) and turn the ignition switch on.
2 On Tech 2 select: Body / Powertrain Interface Module / Security / Security Information .

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