W/Harness Inspection

P0463 Fuel Level Sensor A Circuit High Input

Inspection/Repair - W/Harness Inspection

Terminal and Connector Inspection

1. Many malfunctions in the electrical system are caused by poor harness and terminals.
Faults can also be caused by interference from other electrical systems, and mechanical or chemical damage.
2. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.
3. Has a problem been found?
YES
1) Repair as necessary and go to "Verification of Vehicle Repair" procedure.
NO
1) Go to "Fuel Level Sensor circuit inspection" procedure.

Signal Circuit Inspection

1. IG "OFF".
2. Disconnect Fuel Level Sensor connector.
3. IG "ON".
4. Measure the voltage between terminal 3 of Fuel Level Sensor harness connector and ground.
A. Specification : Approx. 11 V




5. Is the measured voltage within specification?
YES
1) Go to "Ground circuit inspection" procedure.
NO
1) Repair Short to ground circuit and then go to "Verification of Vehicle Repair" procedure.
2) In case of 0 V, repair Open in signal circuit and then go to "Verification of Vehicle Repair" procedure. In case of 12 V, repair Short to power in signal circuit and then go to "Verification of Vehicle Repair" procedure.

Ground Circuit inspection

1. IG "OFF".
2. Disconnect Fuel Level Sensor connector.
3. IG "ON".
4. Measure the voltage between terminal 4 of Fuel Level Sensor harness connector and ground. (A)
Measure the voltage between terminal 1 and 4 of Fuel Level Sensor harness connector. (B)
A. Specification : "A" - "B" = Below 200 mV




5. Is the measured voltage within specification?
YES
1) Go to "Component inspection" procedure.
NO
1) Repair Open in ground circuit and then go to "Verification of Vehicle Repair" procedure.