Service Information

Volt

DTC P0C19

Diagnostic Instructions

•	Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.

•	Review Strategy Based Diagnosis for an overview of the diagnostic approach.

•	Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptor

DTC P0C19: Drive Motor 1 Torque Delivered Performance

Each drive motor generator is controlled by a motor control module. The motor control module constantly monitors the requested torque and the delivered torque of its respective drive motor generator. The motor control module is part of the power inverter module, also called the drive motor generator power inverter module and is not serviced separately.

Conditions for Running the DTC

•	Vehicle ON.

•	Drive motor 1 is commanded to develop torque.

Conditions for Setting the DTC

The motor control module has detected that the drive motor torque is not being delivered as expected.

Action Taken When the DTC Sets

•	DTC P0C19 is a Type A DTC.

•	The hybrid powertrain control module requests the hybrid powertrain control module 2 to open the high-voltage contactor relays.

Conditions for Clearing the DTC

DTC P0C19 is a Type A DTC.

Diagnostic Aids

Because the engine and drive motor 1 are mechanically connected through a planetary gear set, an engine condition that requires drive motor 1 to consume excessive current while trying to rotate the engine may cause this DTC to set such as:

•	Extreme braking during regeneration may cause this DTC to be set in history.

•	Seized or binding engine

•	Seized or binding accessory drive belt

Reference Information

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Circuit/System Verification

Verify that the engine is not seized or binding.

⇒	If the engine is seized or binding, refer to Symptoms - Engine Mechanical .

If the DTC is set, program the T6 power inverter module. If the DTC resets, replace the T6 power inverter module.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Control Module References for Drive Motor Generator Power Inverter Module, also called the power inverter module, replacement, programming and set-up.