The starter/generator control module (SGCM) monitors the performance of the motor generator temperature sensor to detect if it is within range of the other temperature sensors, by comparing it to other temperature sensors it controls.

The engine is running.

Power inverter module (PIM) TEMP 1, PIM TEMP 2, auxiliary power module (APM) TEMP, Board TEMP, motor/generator unit (MGU) TEMP greater than 30°C (80°F) and engine OFF timer greater than 480 minutes of start up.

Hybrid system torque will be limited to 50 percent

The MGU temperature sensor returns normal range for 10 seconds

Schematic Reference

Hybrid Controls Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

Starter/Generator Description and Operation

Electrical Information Reference

Scan Tool Reference

Control Module References for scan tool information

1. Verify DTCs P0A38 or P0A39 are not set.

⇒	If P0A38 or P0A39 are set diagnose those first.

2. Ignition OFF, disconnect harness connectors from the SGCM. Refer to Generator Control Module Replacement
3. Test for 120 - 125 kohms between the signal circuit SGCM X2 terminal 2 and the low reference circuit terminal 14.

⇒	If within the specified range , replace the SGCM.

4. Disconnect the 7 pin X1 connector at the MGU. Refer to Generator with Starter Replacement
5. Test for infinite resistance between the SGCM X2 connector terminal 2 and ground.

⇒	If less than the specified value, test the circuit for short to ground.

6. Test for less than 1 ohm between the SGCM X2 connector terminal 2 and the MGU X1 connector terminal G.

⇒	If greater than the specified value, test the circuit for an open/high resistance.

7. Test for less than 1 ohm between SGCM X2 connector terminal 14 and the MGU X1 connector terminal F.

⇒	If greater than the specified value, test the circuit for an open/high resistance.

8. If circuits test normal, replace the MGU.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.