P129E-INVERTER CONTROL CIRCUIT OVERCURRENT (TIPM)

For a complete wiring diagram Refer to Section 8W.



Possible Causes
TERMINAL DAMAGE OR CORROSION
(P805) INVERTER CONTROL OUTPUT CIRCUIT SHORTED TO GROUND
INVERTER MODULE
TIPM

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING).



Diagnostic Test

1. ACTIVE DTC

Ignition on, engine not running.

NOTE: Low battery voltage can also cause excessive current draw, in very hot and very cold ambient temperatures. Make sure the battery can pass a load test before continuing.


With a scan tool, select View DTCs.
Look closely at the temperatures at which this DTC set.

Is the DTC Active at this time?

Yes


No

2. (P805) INVERTER CONTROL OUTPUT CIRCUIT SHORTED TO GROUND

Turn the ignition off.
Disconnect the TIPM harness connector.
Disconnect the Inverter Module harness connector.
Inspect the wiring connections for corrosion and repair as necessary.
Measure the resistance between ground and the (P805) Inverter Control Output circuit at the Inverter Module harness connector.

Is the resistance below 5.0 ohms?

Yes


No

3. INVERTER MODULE

Turn the ignition off.
Reconnect the TIPM harness connector.
Using a test light connected to ground, probe the Inverter Enable Switch Signal circuit at the Inverter Module harness connector.
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


No