The starter/generator control module (SGCM) monitors to detect auxiliary power module (APM) fault when the APM is commanded in the normal charge mode causing an over current condition. If a fault is detected, the appropriate DTC will set.

P1A95, P1A96

The engine is running.

P1A95

DC-DC direction indicates 42-14 direction, but converter stays in 14-42 direction and current is greater than 20 amps for 1 second.

P1A96

DC-DC direction indicates 14-42 direction, but converter stays in 42-14 direction and current is less than -20 amps for 1 second.

P1A95, P1A96

P1A95, P1A96

Clears 30 seconds after cycle wakeup signal.

P1A95, P1A96

FET breakdown

Schematic Reference

Hybrid Controls Schematics

Connector End View Reference

Hybrid Controls Connector End Views

Electrical Information Reference

Scan Tool Reference

Scan Tool Data List

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.

1. If DTC is history, refer to Testing for Intermittent Conditions and Poor Connections .
2. If DTC is current, replace the starter/generator control module (SGCM).

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Control Module References for SGCM replacement, setup, and programming