Circuit/System Testing

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 the battery voltage is not within the specified range, refer to Charging System Test .
Ignition OFF, disconnect the harness connectors of the appropriate control module.
Ignition OFF and scan tool disconnected, open and close the driver door, and wait 1 minute.
Test for less than 5.0 ohms between the ground circuit and ground.
- Terminal 61 X1-Terminal E12 X4 (BCM)
- Terminal 31 (SDM)
- Terminal 15 (IPC)
- Terminal 8 X2 Radio
- If greater than the specified range, test the ground circuit for an open/high resistance.
Ignition ON, verify a test lamp illuminates between the B+ circuit and ground.
- Terminals D1-D12 X3 (BCM)
- Terminals 1-33 (SDM)
- Terminals 11-13 (IPC)
- Terminal 1 X2 Radio
- If the test lamp did not illuminate, test the B+ circuit for a short to ground or an open/high resistance.
If all circuits test normal, replace the appropriate control module.