P0A1E

DTC P0A1E

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. Initial Inspection and Diagnostic Overview
* 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 Performance

Circuit/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

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 current, replace the SGCM.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure. Verification Tests