No Response From Integrated Power Module (IPM)

*NO RESPONSE FROM INTEGRATED POWER MODULE (IPM)





For a complete wiring diagram Consult Diagrams/Electrical.





Diagnostic Test

1. TEST FOR INTERMITTENT CONDITION

NOTE: Check for any TSB(s) related to the condition. If a TSB applies, perform the procedure outlined in the TSB before continuing.

Turn the ignition on.

NOTE: Ensure the IOD fuse is installed and battery voltage is between 10.0 and 16.0 volts.

With the scan tool, select ECU View.

NOTE: A red X will be next to the module that is not communicating, indicating that the module is not active on the Bus network. A green check indicates that the module is active on the Bus network.

Does the scan tool display a red X next to the module?

Yes

- Go To 2

No

- The no response condition is not present at this time. Using the wiring diagram/schematic as a guide, inspect the wiring for chafed, pierced, pinched, and partially broken wires and the wiring harness connectors for broken, bent, pushed out, and corroded terminals.

2. GROUND CIRCUIT OPEN
Turn the ignition off.
Disconnect the IPM harness connectors.

NOTE: Using the wiring diagrams as a guide locate each IPM ground circuit.

Using a 12-volt test light connected to 12-volts, probe each ground circuit.
Does the test light illuminate brightly?

Yes

- Go To 3

No

- Repair the Ground circuit for an open.
- Perform the BODY VERIFICATION TEST - VER 1. Body Verification Test.

3. FUSED B(+) CIRCUIT OPEN

NOTE: Using the wiring diagrams as a guide locate each IPM Fused B(+) circuit.

Using a 12-volt test light connected to ground, probe each Fused B(+) circuit.
Does the test light illuminate brightly?

Yes

- Go To 4

No

- Repair the Fused B(+) circuit for an open.
- Perform the BODY VERIFICATION TEST - VER 1. Body Verification Test.

4. (D25) PCI BUS CIRCUIT OPEN




Turn the ignition off.
Disconnect the negative battery cable.
Disconnect the IPM C4 harness connector.
Disconnect the scan tool from the DLC connector.
Measure the resistance of the (D25) PCI Bus circuit between the DLC and the IPM C4 harness connector.
Is the resistance below 5.0 ohms?

Yes

- Replace the Integrated Power Module.
- Perform the BODY VERIFICATION TEST - VER 1. Body Verification Test.

No

- Repair the (D25) PCI Bus circuit for an open.
- Perform the BODY VERIFICATION TEST - VER 1. Body Verification Test.