Circuit/System Testing

WARNING: This page is about a different car, the 2009 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.

WARNING: 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.

NOTE: In order to avoid damaging BECM X1 and X2 connector terminals, the proper test probes should be used. The proper test probes are as follows:

J-35616-65B for female terminals
J-35616-64B for male terminals

P0A81

Ignition OFF, disconnect the generator battery vent fan harness connector. Refer to Hybrid Battery Service Disconnect/Connect .
Disconnect the BECM X2 harness connector.
Test the cooling fan control circuit for an open or high resistance.
- If the circuit tests normal, replace the BECM.
Replace the harness assembly.

P0A82

Ignition ON, with scan tool command the generator battery vent fan ON.
- If the fan operates, replace the BECM.
Ignition OFF, disconnect the generator battery vent fan harness connector. Refer to Hybrid Battery Service Disconnect/Connect .
Disconnect BECM X2 harness connector.
Test for less than 1 ohm between the following circuits listed below.
- BECM X2 connector terminal 2 to fan harness connector terminal 1
- BECM X2 connector terminal 4 to fan harness connector terminal 2
- BECM X2 connector terminal 3 to fan harness connector terminal 3
- BECM X2 connector terminal 11 to fan harness connector terminal 4
- If greater than the specified range, replace the generator battery vent fan harness assembly.
If all circuits test normal, replace the generator battery vent fan.

P0A83

Ignition OFF, disconnect the generator battery vent fan harness connector. Refer to Hybrid Battery Service Disconnect/Connect .
Disconnect BECM X2 harness connector.
Test the fan control circuit terminal 3 for a short to ground.
- If the circuit tests normal, replace the BECM.