The starter/generator control module (SGCM) temperature sensor is used for system overheat protection. The SGCM monitors the board temperature sensor for an overtermperature condition.

The engine is running.

Board temperature is greater than 120°C (248°F) for 1 second.

Board temperature is less than 120°C (248°F) for 3 second.

Possible engine or SGCM cooling system failure due to the following:

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. Using the scan tool verify the SGCM coolant pump operates
2. If DTC is history, refer to Testing for Intermittent Conditions and Poor Connections .
3. With ignition ON, observe the scan tool SGCM temperature sensor parameters.

⇒	If only the SGCM board temperature sensor reads high, replace the SGCM.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Control Module References for SGCM replacement, setup, and programming