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 V.
- 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 Ω between the ground circuits listed below and ground.
- Terminal 8 X1 (AMP)
- Terminal 38 X1 (DDR)
- Terminal 38 X1 (HDD)
- Terminal 10 X1 (HVAC)
- Terminal 17 (IPC)
- Terminal 8 X1 (NAV)
- Terminal 7 X1 (RPA)
- Terminal D (PPS)
- Terminal S X1 (RCDLR EK2)
- Terminal 19 (TVM)
- If greater than the specified range, test the ground circuit for an open/high resistance.
- Verify that a test lamp illuminates between the B+ circuit terminals listed below and ground.
- Terminal 4 X1 (AMP)
- Terminal 44 X1 (DDR)
- Terminal 44 X1 (HDD
- Terminal 18 X1 HVAC)
- Terminal 19 (IPC)
- Terminal 4 X1 (NAV)
- Terminal 1 X1 (RPA)
- Terminal A (PPS)
- Terminal H X1 (RCDLR EK2)
- Terminal 20 (TVM)
- If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance.
- If the circuits test normal, replace the appropriate control module.