The power inverter module (PIM) temperature 1 sensor is used for overheat protection. The thermistor is located on the control board, near the phase W power MOSFET. The starter/generator control module (SGCM) monitors the inverter temperature sensor to detect the failure of the inverter temperature sensor circuit using rationality of other temperature sensors to determine if it is out of range.

The engine is running.

Inverter temperature sensor is greater than 55°C (131°F) for 2 seconds.

50 percent maximum torque limit

Normal range for 10 seconds

Possible internal failure at temperature sensor

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 SGCM.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Generator Control Module Replacement for SGCM replacement, setup, and programming