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 P0A1F: Battery Energy Control Module Internal PerformanceDTC P1A01: Battery Energy Control Module Long Term Memory Performance
DTC P1A05: Battery Energy Control Module Random Access Memory (RAM)
DTC P1A06: Battery Energy Control Module Read Only Memory (ROM)
Circuit/System Description
The drive motor generator battery control module (GBCM) performs tests on its own internal memory to detect failures. No external circuits are involved. Failure of these diagnostics can cause erratic hybrid drive motor battery and HV contactor relay operation.
Conditions for Running the DTC
The ignition is ON.
Conditions for Setting the DTC
The BECM has detected an internal malfunction.
Action Taken When the DTC Sets
| • | The contactors will either open or will not change state, depending on conditions. |
| • | The malfunction indicator lamp (MIL) turns ON. |
Conditions for Clearing the DTC
| • | DTCs P0A1F, P1A01, P1A05, and P1A06 are type A DTCs. |
| • | DTC P1A01 will pass if the EEPROM checksum matches when the ignition is turned OFF. |
Reference Information
Schematic Reference
Hybrid Energy Storage Schematics
Connector End View Reference
Description and Operation
Drive Motor Battery System Description
Electrical Information Reference
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
Circuit/System Verification
Replace the drive motor generator battery control module.
Repair Instructions
Perform the Diagnostic Repair Verification after completing the repair.
Control Module References - for drive motor generator battery control module replacement, setup and programming.
