Service Information

Volt

DTC P0CF9 or P0D01

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 Descriptors

DTC P0CF9: Control Pilot Charging Switch Performance

DTC P0D01: Control Pilot Charging Ventilation Switch Performance

The hybrid/EV powertrain control module 2 has two internal switches used to modify the control pilot signal. The first internal switch modifies the control pilot signal to indicate to the drive motor battery charger cable that the vehicle is either ready or not ready to accept energy. The second internal switch modifies the control pilot signal to indicate to the drive motor battery charger cable whether indoor ventilation is required.

Conditions for Running the DTC

•	The vehicle 12 V battery system voltage needs to be above 9 V.

•	The drive motor battery charger cable is disconnected and the charge port door is closed.

•	Vehicle in Service Mode.

•	The diagnostics for DTC P0CF4-P0CF6 must have passed before these will run.

Conditions for Setting the DTC

The hybrid/EV powertrain control module 2 measures a pilot signal voltage out of range for 10 seconds. This is an internal circuit voltage in the hybrid/EV powertrain control module 2 and can not be measured.

Action Taken When the DTC Sets

•	DTC P0CF9 and P0D01 are type A DTCs

•	Disables the high-voltage battery charging.

Conditions for Clearing the DTC

DTC P0CF9 and P0D01 are type A DTCs.

Reference Information

Electrical Information Reference

•	Circuit Testing

•	Connector Repairs

•	Testing for Intermittent Conditions and Poor Connections

•	Wiring Repairs

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Scan Tool Reference

Control Module References for scan tool information

Special Tools

EL-48900 HEV Safety Kit

For equivalent regional tools, refer to Special Tools .

Circuit/System Verification

Verify that DTC P0CF9 or P0D01 is not set.

⇒	If either of the DTCs are set, replace the K114B hybrid/EV powertrain control module 2.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Control Module References for hybrid/EV powertrain control module 2 replacement, programming and set-up