For 1990-2009 cars only
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 P0A1B: Drive Motor 1 Control Module PerformanceDTC P0A1C: Drive Motor 2 Control Module Performance
Circuit/System Description
This is a fault detection of the Drive Motor Generator Power Inverter Modules' (PIM) internal Motor Control Module (MCM). This fault is handled inside the PIM and no external circuits are involved. The MCMs are located within the PIM and are not serviced separately.
Conditions for Running the DTC
| • | The control module runs the program to detect an internal fault when the key is ON. |
| • | Ignition voltage is 8-18 volts. |
Conditions for Setting the DTC
The control module has detected an internal malfunction.
Action Taken When the DTC Sets
| • | DTCs P0A1B and P0A1C are Type A DTCs. |
| • | The PIM commands the battery energy control module (BECM) to open the high voltage contactor relays. |
Conditions for Clearing the DTC
DTCs P0A1B and P0A1C are Type A DTCs.
Reference Information
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions
Circuit/System Verification
- Clear the DTC information.
- Turn the ignition OFF for 1 minute.
- Turn the ignition ON.
- Retest for DTCs P0A1B and P0A1C.
Circuit/System Testing
Program the PIM with the latest software version and recheck for DTCs.
| ⇒ | If the DTC resets after programming or if the PIM already contains the latest software version, replace the PIM. |
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
Control Module References for PIM replacement, setup, and programming.
