Circuit/System Testing
- Ignition OFF, disconnect the harness connector at the fuel level sensors.
- Ignition ON, verify that the scan tool Fuel Tank Level Remaining parameter is less than 4 percent.
- If greater than the specified value, test the signal circuit terminal D for a short to ground. If the circuit tests normal, replace the ECM.
- Ignition OFF, test for greater than 1 ohm between the fuel level sensor signal circuit terminal C and ground.
- If less than the specified value, test the signal circuit for a short to ground.
- If all circuits test normal, test or replace the fuel level sensors.