P0C32
DTC P0C32
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 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.
OR
* 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, 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.
OR
* 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 Hybrid Cooling Schematics
* HVAC Schematics Electrical Diagrams
Connector End View Reference
Component Connector End Views Hybrid/EV Battery Pack X1
Description and Operation
Drive Motor Battery System Description Drive Motor Battery System Description
Electrical Information Reference
* Circuit Testing Circuit Testing
* Connector Repairs Connector Repairs
* Testing for Intermittent Conditions and Poor Connections Testing for Intermittent Conditions and Poor Connections
* Wiring Repairs Wiring Repairs
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions Powertrain Diagnostic Trouble Code (DTC) Type Definitions
Scan Tool Reference
Control Module References Programming and Relearning for scan tool information
Circuit/System Verification
Danger: The Volt Battery Pack will utilize an exchange program. Please consult the most recent revision of bulletin/PI #PIP4841, available in Service Information (SI), for a list of approved Volt Battery Pack service procedures. Components that may be removed and serviced without exchanging the complete battery pack are identified in the bulletin/PI. Please contact the GM Technical Assistance Center (1-877-446-8227) if you have any questions.
1. 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 Diagnostic Trouble Code (DTC) List - Vehicle
2. 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 Hybrid/EV Battery Cooling Diagnostic.
• If the reading is above 45°C (113°F) refer to Hybrid/EV Battery Cooling Diagnostic Hybrid/EV Battery Cooling Diagnostic.