Circuit/System Testing
- Ignition OFF, disconnect the harness connector at the B16 Backup Lamp Switch.
- Test for less than 5 Ω between the ground circuit terminal 2 and ground.
- If greater then the specified value, test the ground circuit for an open circuit/high resistance.
- Disconnect the K20 Engine Control Module harness connector listed below:
- Harness connector X1 with LDK or LBY
- Harness Connector X2 with LUU, LBS, LAU or LBW
- ignition On, test for less than 0.3 V at the B16 Backup Lamp Switch signal circuit harness connector terminal 1 and ground.
- If greater then the specified value, test the signal circuit for a short to voltage.
- Ignition OFF, test for infinite resistance between the B16 Backup Lamp Switch signal circuit harness connector 1 and ground.
- If lower then the specified value, test the signal circuit for a short to ground.
- Connect the harness connector at the B16 Backup Lamp Switch.
- Reversing gear engaged, test for less than 5 Ω between the K20 Engine Control Module harness connector terminal listed below and ground:
- Terminal 34 with LBY
- Terminal 75 with LBS
- Terminal 18 with LDK, LBW or LAU
- Terminal 82 with LLU
- If greater then the specified value, test the signal circuit for an open circuit/high resistance. If the circuit test normal, test or replace the B16 Backup Lamp Switch.
- Reversing gear disengaged, test for infinite resistance between the K20 Engine Control Module harness connector terminal listed below and ground:
- Terminal 34 with LBY
- Terminal 75 with LBS
- Terminal 18 with LDK, LBW or LAU
- Terminal 82 with LLU
- If lower then the specified value, test or replace the B16 Backup Lamp Switch.
- If all the circuits test normal, replace the K20 Engine Control Module.