• | 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 starter/generator control module (SGCM) monitors the performance of the motor generator unit (MGU) temperature sensor to detect if it is within range of the other temperature sensors, by comparing it to other temperature sensors it monitors.
The engine is ON.
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
Hybrid Controls Connector End Views
Starter/Generator Description and Operation
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.
⇒ | If P0A38 or P0A39 are set diagnose those first. |
⇒ | If within the specified range, replace the SGCM. |
⇒ | If greater than the specified value, repair the open/high resistance. |
⇒ | If greater than the specified value, repair the open/high resistance. |
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
• | Generator with Starter Replacement for MGU replacement |
• | Control Module References for SGCM replacement, setup, and programming |