P129C

P129C-INVERTER CONTROL CIRCUIT HIGH





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

- When Monitored:
With the ignition on and battery voltage greater than 10 volts. Once the inverter switch is turned on, the Cluster (CCN) sends a request to the Totally Integrated Power Module (TIPM) to turn on the Inverter.

- Set Condition:
If the TIPM detects an open or short high condition on the (P805) Inverter Enable Switch Signal circuit.





1. TEST FOR INTERMITTENT CONDITION
1. Turn the ignition on.
2. With the scan tool, record and erase DTCs.
3. Operate the Inverter switch several times.
4. With the scan tool, read 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. Look for chafed, pierced, pinched, or partially broken wires and broken, bent, pushed out, spread, corroded, or contaminated terminals.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

2. CHECK (P805) INVERTER ENABLE SWITCH SIGNAL CIRCUIT FOR A SHORT 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. Using a 12-volt test light connected to ground, probe the (P805) Inverter Enable Switch Signal circuit at the Inverter Module harness connector.

Does the test light illuminate?

Yes

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

No

- Go To 3

3. CHECK (P805) INVERTER ENABLE SWITCH SIGNAL CIRCUIT FUNCTION




1. Turn the ignition off.
2. Reconnect the TIPM C7 harness connector.
3. Using a 12-volt 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. CHECK (P805) INVERTER ENABLE SWITCH SIGNAL CIRCUIT FOR AN OPEN




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

Is the resistance below 5.0 Ohms?

Yes

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

No

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