P129E

P129E - Inverter Control Circuit Overcurrent

For a complete wiring diagram, refer to.

• When Monitored: With the ignition ON and the battery voltage greater than 10.4 volts.

• Set Condition: An overcurrent condition is detected in the inverter control output circuit.






Test Step 1 - Active DTC

• Ignition ON, engine not running.

• 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 under which this DTC set.

Is the DTC active at this time?

Yes

• Go to Test Step 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. Refer to => Non-DTC Based Diagnostics. Body Interior

Test Step 2 - Inverter Control Output Circuit Short 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 inverter control output circuit at the inverter module harness connector.

Is the resistance less than 5.0 ohms?

Yes

• Go to Test Step 3.

No

• Repair the short to ground in the circuit.

• Perform the Body Verification Test. Refer to => Non-DTC Based Diagnostics. Body Interior

Test Step 3 - Inverter Module

• Turn the ignition OFF.

• Connect the TIPM harness connector.

• Using a test lamp 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.

• The test lamp should be illuminated and bright. Compare the brightness to that of a direct connection to the battery.

Does the test lamp illuminate brightly?

Yes

• Replace the inverter module.

• Perform the Body Verification Test. Refer to => Non-DTC Based Diagnostics. Body Interior

No

• Replace the totally integrated power module.

• Perform the Body Verification Test. Refer to => Non-DTC Based Diagnostics. Body Interior