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 P0A1E: Starter/Generator Control Module Internal PerformanceCircuit/System Description
The internal fault detection is handled inside the starter/generator control module (SGCM). No external circuits are involved.
Conditions for Running the DTC
The engine is running.
Conditions for Setting the DTC
| • | CPU calculation error |
| • | ACR task check error |
| • | Sub CPU error |
Action Taken When the DTC Sets
| • | Stop PWM (MGU shutdown). |
| • | APM PWM off |
Conditions for Clearing the DTC
Clears 30 seconds after cycle wakeup signal.
Diagnostic Aids
Possible electrical failure at SGCM
Reference Information
Schematic Reference
Connector End View Reference
Hybrid Controls Connector End Views
Electrical Information Reference
Scan Tool Reference
Circuit/System Verification
Caution: To help avoid personal injury, additional precautions must be taken prior to working on the generator control module or the generator starter. After removing the 36V battery cables from the generator battery, remove both engine wiring harness connectors from the generator control module. Wait at least 5 minutes and then remove the generator control module cover. Verify voltage levels at all 36V, 12V, and 3-phase connections, are less than 3 volts using a DMM before proceeding.
- If DTC is history, refer to Testing for Intermittent Conditions and Poor Connections .
- If DTC is current, replace the SGCM.
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
Control Module References for SGCM replacement, setup, and programming.
