Circuit/System Testing
WARNING: This page is about a different car, the 2007 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.
Important: Use the following list to identify the appropriate terminals to test:
- DTC P0A9D - P0A9E - Battery 1A Temperature Sensor Terminals 3 and 4
- DTC P0AC7 - P0AC8 - Battery 1B Temperature Sensor Terminals 5 and 6
- DTC P0ACC - P0ACD - Battery 2A Temperature Sensor Terminals 7 and 8
- DTC P0AEA - P0AEB - Battery 2B Temperature Sensor Terminals 13 and 14
- DTC P0A1A - P0A1B - Battery 3A Temperature Sensor Terminals 15 and 16
- DTC P0A1D - P0A1E - Battery 3B Temperature Sensor Terminals 17 and 18
- Ignition OFF, disconnect harness connector C1 from the BECM. Refer to.
Important: The following test must be performed at room temperature. An increase or decrease in temperature will cause resistance to change and may result in invalid test results.
- Test for 10.5 - 11.5 Kohms of resistance between the applicable temperature sensor circuit terminals.
- If not within the specified range, test or replace the applicable temperature sensor.
- If all circuits test normal, replace the BECM.