Circuit/System Testing

WARNING: This page is about a different car, the 2010 Pontiac G5 and 2010 Chevrolet Cobalt. However, it is still accessible from the selected car via links, so may be relevant.

Engine running, accessories OFF, measure and record the battery voltage at the battery terminals. The voltage should be between 12.6 and 15.0 volts.
- If not within the specified range, refer to Charging System Test .

WARNING: Refer to SIR Warning .

Ignition OFF, disconnect the harness connectors at the appropriate module.
Ignition OFF and scan tool disconnected, open and close the driver door, and wait 1 minute. Test for less than 5 ohms between the following ground circuit terminals and ground:
- Terminal 15 (IPC)
- Terminal 16 (IPC)
- Terminal 31 (SDM)
- Terminal 8 X1 (Radio)
- Terminal 61 X1 (BCM)
- Terminal 64 X1 (BCM)
- Terminal E12 X4 (BCM)
- If greater than the specified range, test the ground circuit for an open/high resistance.
Verify that a test lamp illuminates between the following B+ circuit terminals and ground:
- Terminal 1 (SDM)
- Terminal 13 (IPC)
- Terminal 1 X1 (Radio)
- Terminal D12 X3 (BCM)
- If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance.
If all circuits test normal, replace the appropriate module.