P0C12

DTC P0C11-P0C16

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis Strategy Based Diagnosis for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptor
DTC P0C11
- Drive Motor 1 Inverter Phase U High Temperature

DTC P0C12
- Drive Motor 1 Inverter Phase V High Temperature

DTC P0C13
- Drive Motor 1 Inverter Phase W High Temperature

DTC P0C14
- Drive Motor 2 Inverter Phase U High Temperature

DTC P0C15
- Drive Motor 2 Inverter Phase V High Temperature

DTC P0C16
- Drive Motor 2 Inverter Phase W High Temperature

Circuit/System Description

The power inverter module, often referred to as the drive motor generator power inverter module, contains two motor control modules and the hybrid powertrain control module. Each motor control modules operates its respective drive motor generator based upon hybrid powertrain control module commands. Each motor control modules controls the speed, direction and output torque of its respective drive motor generator through the sequencing actuation of high current switching transistors called insulated gate bipolar transistors. Each drive motor generator operates utilizing 3 phase AC. Each insulated gate bipolar transistor operates a single phase of the drive motor generator. Each phase is individually identified as U, V and W. Each motor control modules monitors the temperature of each phase in order to detect power inverter module overtemperature conditions.

Conditions for Running the DTC

P0C11-P0C16

Vehicle ON.

P0C11

DTC P0AEE is not set.

P0C12

DTC P0BDC is not set.

P0C13

DTC P0BD2 is not set.

P0C14

DTC P0AF3 is not set.

P0C15

DTC P0BD7 is not set.

P0C16

DTC P0BE1 is not set.

Conditions for Setting the DTC

The phase temperature has exceeded 98°C (208°F) for 5 seconds.

Action Taken When the DTC Sets

* DTCs P0C11, P0C12, P0C13, P0C14, P0C15 and P0C16 are Type A DTCs.
* The power inverter module requests the hybrid powertrain control module 2 to open the high voltage contactor relays.

Conditions for Clearing the DTC

DTCs P0C11, P0C12, P0C13, P0C14, P0C15 and P0C16 are Type A DTCs.

Reference Information
Description and Operation

* Drive Motor Generator Power Inverter Module Description and Operation Drive Motor Generator Power Inverter Module Description and Operation
* Drive Motor Generator Control Module Cooling System Description and Operation Drive Motor Generator Control Module Cooling System Description and Operation

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Circuit/System Verification

1. Vehicle ON, observe the scan tool ECM engine coolant temperature (ECT) parameter in freeze frame data. The reading should be below 125°C (257°F).

• If the ECT was above 125°C (257°F) when the DTC set, go to Symptoms - Engine Cooling Symptoms - Engine Cooling and correct that concern first.

2. Inspect for proper coolant level in the hybrid cooling system reservoir.

• If coolant level is low refer to Hybrid Cooling System Loss of Coolant Hybrid Cooling System Loss of Coolant.

3. Inspect the hybrid cooling system radiator for debris or obstruction.

• If a concern is found, repair or replace the restricted or damaged components as necessary.

4. Inspect for proper operation of all hybrid system coolant pumps. Refer Hybrid/EV Electronics Cooling Diagnostic Hybrid/EV Electronics Cooling Diagnostic.

• If a concern is found, repair or replace the coolant pumps as necessary.

5. Command the cooling fans through all operating speeds.

• If the cooling fans do not operate in all speeds, refer to Hybrid/EV Electronics Cooling Diagnostic Hybrid/EV Electronics Cooling Diagnostic.

Repair Instructions

Perform the Diagnostic Repair Verification Verification Tests after completing the diagnostic procedure.

Control Module References Programming and Relearning for Drive Motor Generator Power Inverter Module, also called the power inverter module, replacement, programming, and setup.