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.
- 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 appropriate ground circuit terminals listed below and ground.
- Terminal 5 (PPS)
- Terminal 13 (IPC)
- Terminal 8 X1 (amplifier, radio)
- Terminal 7 X2 (rear object)
- If greater than the specified range, test the ground circuit for an open/high resistance.
- Verify that a test lamp illuminates between the appropriate B+ circuit terminals listed below and ground.
- Terminal 1 (IPC, PPS)
- Terminal 1 X1 (radio)
- Terminal 4 X1 (amplifier)
- Terminal 1 X2 (rear object)
- 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.