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?






Signal Circuit Inspection

Check voltage
1. IG "OFF" and disconnect Fuel Level Sender & Fuel pump Motor connector and ECM connector.
2. IG "ON".
3. Measure voltage between fuel level signal terminal of ECM harness connector and chassis ground.

Specification : Approx. 11-12V





4. Is the measured voltage within specification?





Check open in harness
1. IG "OFF" and disconnect Instrument cluster connector and Fuel Level Sender & Fuel pump Motor connector.
2. Measure resistance between fuel level signal terminal of Fuel Level Sender & Fuel pump Motor connector and Fuel input terminal of Instrument cluster harness connector.

Specification : Below 1 Ohm





3. Is the measured resistance within specification?





Check short to ground in harness
1. IG "OFF" and disconnect Instrument cluster connector and Fuel Level Sender & Fuel pump Motor connector.
2. Measure resistance between fuel level signal terminal of Fuel Level Sender & Fuel pump Motor harness connector and chassis ground.

Specification : Below 1 Ohm





3. Is the measured resistance within specification?