Circuit/System Testing
- Ignition OFF, disconnect the harness connector at the B16 Backup Lamp Switch.
- Disconnect the negative terminal of the C1 Battery.
- Test for less than 5 Ω between the ground circuit harness connector terminal 2 and ground.
- If greater than the specified value, test the ground circuit for an open/high resistance.
- Reconnect the negative terminal to the C1 Battery.
- Disconnect the X2 harness connector at the K20 Engine Control Module.
- 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 than 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 than the specified value, test the signal circuit for a short to ground.
- Connect the harness connector at the B16 Backup Lamp Switch.
- Disconnect the negative terminal of the C1 Battery.
- Reversing gear engaged, test for less than 5 Ω between the K20 Engine Control Module X2 harness connector terminal listed below and ground:
- Terminal 34 with LBY
- Terminal 75 with LCD, LBX or LBS
- Terminal 28 with LDE or 2H0
- Terminal 18 with LDK or LBW
- Terminal 82 with LLU
- If greater than the specified value, test the signal circuit for an open/high resistance. If the circuit tests normal, test or replace the B16 Backup Lamp Switch.
- Reversing gear disengaged, test for infinite resistance between the K20 Engine Control Module X2 harness connector terminal listed below and ground:
- Terminal 34 with LBY
- Terminal 75 with LCD, LBX or LBS
- Terminal 28 with LDE or 2H0
- Terminal 18 with LDK or LBW
- Terminal 82 with LLU
- If lower than the specified value, test or replace the B16 Backup Lamp Switch.
- If all the circuits test normal, replace the K20 Engine Control Module.