The starter/generator control module (SGCM) monitors the internal torque value and compares it to the motor generator unit (MGU) delivered torque value. If the delivered torque is not within tolerance, the DTC will set.

The engine is running.

Torque error is greater than 10 N·m for 1 second.

Delivered torque (CAN data) = command torque.

Normal range for 1 second

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. Disconnect harness connector C2 from the SGCM. Refer to Generator Control Module Replacement .
2. Using the appropriate test adapters, test for 5-100 ohms resistance between terminals 9 and 12.

⇒	If within the specified range, replace the SGCM.

3. Disconnect the 7 pin C1 connector at the MGU. Refer to Generator with Starter Replacement .
4. Test for less than 1 ohm between SGCM connector harness terminal 12 and the MGU connector harness terminal A.

⇒	If greater than the specified range, repair the open circuit.

5. Test for less than 1 ohm between SGCM connector harness terminal 9 and the MGU C1 connector harness terminal C.

⇒	If greater than the specified range, repair the open circuit.

6. If both circuits test normal, replace the MGU.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.