Circuit/System Testing
WARNING: This page is about a different car, the 2008 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.
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.
CAUTION:
To help avoid personal injury, be careful when working in the vicinity of the generator battery disconnect control module. Internal components will still be live, 36V potential, even when the cover has been opened or removed.
SGCM 36-Volt Output Terminal Circuit Low
- If DTC is history, refer to Testing for Intermittent Conditions and Poor Connections .
- Ignition ON, test for greater than 22 volts at the SGCM battery positive 36-volt output voltage stud.
- If less than the specified value, test the 36-volt cable for an open/high resistance or short to ground.
- If greater than the specified value, replace the SGCM.
Hybrid Battery Pack Voltage Low
- If DTC is history, refer to Testing for Intermittent Conditions and Poor Connections .
- Gain access to the hybrid battery pack. Refer to Hybrid Battery Service Disconnect/Connect .
- Ignition OFF, test battery pack voltage for greater than 22 volts.
- If less than the specified value, replace the battery pack.