Service Information

Volt

DTC P0C32

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 P0C32: Hybrid/EV Battery Pack Cooling System Performance

Circuit/System Description

The hybrid/EV powertrain control module 2 will monitor the battery temperature and set a DTC if the battery temperature can not be properly maintained.

Conditions for Running the DTC

•	The 12 V system voltage is greater than 9 V.

•	The vehicle is in propulsion system active mode.

•	The vehicle is plugged into an AC source.

•	DTC P1EC6 heater performance diagnostic, DTC P0C4A pump performance diagnostic and DTC P0534 R134A low-charge detection have completed

•	The following DTCs are not set; P0534, P0C47, P0C4A, P0CE0, P0CE2, P0CE3, P1A5A, P1EC6, P1EC7, P1EC8 and P1F18

Conditions for Setting the DTC

•	The vehicle is in Active Cooling mode.

•	The Battery Average Temperature continuously exceeds 45°C (113°F) for 5 minutes.

•	The vehicle is in Active Heating mode.

•	The Battery Average Temperature is continuously below -25°C (-13°F) for 50 minutes.

Action Taken When the DTC Sets

DTC P0C32 is a type A DTC.

Conditions for Clearing the DTC

DTC P0C32 is a type A DTC.

Diagnostic Aids

•	The hybrid/EV battery pack coolant pump may be faulty.

•	The hybrid/EV battery pack coolant control valve may be leaking internally.

•	The hybrid/EV battery pack heater may be defective.

•	The hybrid/EV battery coolant level may be low or there may be no coolant.

•	The AC refrigerant level may be low or the AC chiller may be inoperative.

•	The hybrid/EV battery coolant lines may be restricted or blocked.

Reference Information

Schematic Reference

•	Hybrid Cooling Schematics

•	HVAC Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

Drive Motor Battery System Description

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

Danger: Any hybrid/EV battery pack replacement shall be performed by High-Voltage Qualified Technicians only. The replacement procedure can be found in the service instruction and must be strictly followed at all times. The High-Voltage Qualified Technician is responsible for adherence to the manufacturer's service instructions as well as current national legal regulations. If the hybrid/EV battery pack needs to be replaced contact the Technical Assistance Centre for further instructions prior to removal of the battery pack.

Vehicle in Service Mode, verify that DTCs P0C47, P0C4A, P0CE0, P0CE2, P0CE3, P0CE6, P0CE7, P148A, P148B, P148C, P1EBE, P1EBF, P1EC3, P1EC4, P1EC5, P1EC6, P1EC7, P1EC8 or P1F18 is not set.

⇒	If any of the DTCs is set, refer to Diagnostic Trouble Code (DTC) List - Vehicle

Observe the scan tool Battery Average Temperature parameter. The reading should be above -25°C (-13°F) and below 45° C (113° F).

⇒	If the reading is below -25°C (-13°F) refer to Hybrid/EV Battery Cooling Diagnostic .

⇒	If the reading is above 45°C (113°F) refer to Hybrid/EV Battery Cooling Diagnostic .