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 5 (IPC)
- Terminal 5 (PPS)
- Terminal 8 X1 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.
- Terminal 10-20 (IPC)
- Terminal 1 (PPS)
- Terminal 1 X1 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.