• | Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. |
• | Review Strategy Based Diagnosis for an overview of the diagnostic approach. |
• | Diagnostic Procedure Instructions provides an overview of each diagnostic category. |
The power inverter module (PIM) temperature 1 and 2 sensors are used for overheat protection. The thermistors are located on the control board, near the phase U or V power MOSFET. The starter/generator control module (SGCM) monitors the inverter temperature sensor for the following:
• | To detect if the inverter phase U or V temperature sensor is shorted low. |
• | To detect if the inverter phase U or V temperature sensor is shorted high. |
If one of the above conditions is detected, the SGCM will set the appropriate DTC.
The engine is running.
Sensor output voltage is less than 0.2 volt for 1 second.
Sensor output voltage is greater than 4.6 volts for 1 second.
50 percent maximum torque limit.
Normal range for 10 seconds.
Possible temperature sensor short to ground.
Possible temperature sensor short to voltage or open.
Hybrid Controls Connector End Views
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.
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
Control Module References for SGCM replacement, setup, and programming.