Volt

DTC P0C05 or P0C08

Each drive motor is controlled by a motor control module. The drive motor utilises 3-phase AC electricity. The drive motor stator coil is comprised of three phase circuits. The phase circuits are identified as phase U, phase V and phase W. The U-V-W phase circuits are connected in a wye configuration. This means each phase is connected at a single, central point. The motor control modules monitor a current sensor connected to each drive motor generator phase. The current sensor is part of the drive motor assembly and is not serviced separately. The motor control module is part of the power inverter module, often referred to as the drive motor generator power inverter module, and is not serviced separately.

The motor control module detects at least one U-V-W phase current sensor is less than 9 A.

DTCs P0C05 and P0C08 are Type A DTCs.

Schematic Reference

Hybrid Controls Schematics

Electrical Information Reference

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Danger: Always perform the High-Voltage Disabling procedure prior to servicing any High Voltage component or connection. Personal Protection Equipment (PPE) and proper procedures must be followed.

The High-Voltage Disabling procedure will perform the following tasks:

•	Identify how to disable high voltage.

•	Identify how to test for the presence of high voltage.

•	Identify conditions under which high voltage is always present and personal protection equipment (PPE) and proper procedures must be followed.

Failure to follow the procedures exactly as written may result in serious injury or death.
1. Perform the High Voltage Disabling procedure for servicing at the T6 power inverter module cable connections.
2. Remove the 3-phase cable assembly from the power inverter module distribution box. Refer to Hybrid Controls Electronic Component Views Figure 2: High Voltage Terminal Locator.
3. Test for less than 0.5 ohms at each phase by measuring between the following circuits with a DMM:

•	Phase U and phase V

•	Phase U and phase W

⇒	If not the specified value, inspect the 3 phase cable terminal fasteners at the Drive Motor Generator Rotor for the proper torque and for arc-flash damage. Refer to Drive Motor Generator Rotor and Stator Removal - Unit A and Drive Motor Generator Rotor and Stator Removal - Unit B .

⇒	If any fasteners were loose and no arc-flash damage is present, torque the fasteners and re-assemble the vehicle. Retest for the DTC.

⇒	If any fasteners were loose and arc-flash damage is present, replace the drive motor generator assembly and the 3 phase cable assembly.

⇒	Disconnect the 3 phase cable assembly from the transmission. Refer to Drive Motor Generator Rotor and Stator Removal - Unit A and Drive Motor Generator Rotor and Stator Removal - Unit B .

⇒	Test each cable for continuity from the PIM connection terminal to the transmission connection terminal.

⇒	If you measure greater than 0.5 ohms, replace the 3 phase cable assembly.

⇒	Replace the drive motor generator assembly and retest for the DTC. If the DTC resets, replace the PIM.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.