Circuit/System Testing
- With the ignition OFF, disconnect C413.
- Connect a 3-ampere fused jumper wire between the signal circuit of the fuel level sensor and the low reference circuit of the fuel level sensor on the male terminal side of the connector.
- With the ignition ON, install a scan tool and observe the Fuel Tank Level Remaining parameter in the PCM/ECM EVAP Data List.
- If the Fuel Tank Level Remaining parameter indicates a value less than 98 percent, check the signal circuit and the low reference circuit of the fuel level sensor for an open, a high resistance or a short to voltage.
- If both the signal circuit and the low reference circuit tests normal, replace the PCM/ECM.
- If the Fuel Tank Level Remaining parameter indicates a value greater than 98 percent, check the signal circuit and the low reference circuit of the fuel level sensor for an open, for a high resistance or a short to voltage between C413 and the fuel level sensor.
- If both the signal circuit and the low reference circuit tests normal between C413 and the fuel level sensor, replace the fuel level sensor.