P129C

P129C-INVERTER CONTROL CIRCUIT HIGH

For a complete wiring diagram, refer to the Wiring Information.

- When Monitored:
With the ignition on. Battery voltage greater than 10 volts.

- Set Condition:
An open or shorted high condition has been detected in the Inverter Enable Switch Signal circuit by the Totally Integrated Power Module (TIPM).





Diagnostic Test

1. ACTIVE DTC
1. Ignition on, engine not running.
2. With a scan tool, select View DTCs.

Is the DTC Active at this time?

Yes

- Go To 2

No

- The conditions that caused this code to set are not present at this time. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

2. (P805) INVERTER ENABLE SWITCH SIGNAL CIRCUIT SHORTED TO VOLTAGE
1. Turn the ignition off.
2. Disconnect the Inverter Module harness connector.
3. Disconnect the TIPM C7 harness connector.
4. Turn the ignition on.
5. Measure the voltage of the (P805) Inverter Enable Switch Signal circuit at the Inverter Module harness connector.

Is there voltage present?

Yes

- Repair the short to voltage in the (P805) Inverter Enable Switch Signal circuit.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

No

- Go To 3

3. INVERTER MODULE
1. Turn the ignition off.
2. Reconnect the TIPM C7 harness connector.
3. Using a test light connected to ground, probe the (P805) Inverter Enable Switch Signal circuit at the Inverter Module harness connector.
4. Using the scan tool, actuate the Inverter Enable control.

NOTE: The test light should be illuminated and bright. Compare the brightness to that of a direct connection to the battery.

Does the test light illuminate brightly?

Yes

- Replace the Inverter Module.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

No

- Go To 4

4. (P805) INVERTER ENABLE SWITCH SIGNAL CIRCUIT OPEN
1. Turn the ignition off.
2. Disconnect the TIPM C7 harness connector.
3. Measure the resistance of the (P805) Inverter Enable Switch Signal circuit between the Inverter Switch and Inverter Module harness connector.

Is the resistance below 5.0 Ohms?

Yes

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

No

- Repair the open in the (P805) Inverter Enable Switch Signal circuit.
- Perform the BODY VERIFICATION TEST. Body Verification Test.