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?






Power Circuit Inspection

Check voltage
1. IG "OFF" and disconnect Cruise switch connector.
2. IG "ON"
3. Measure voltage between power terminal of Cruise switch harness connector and chassis ground.

Specification : Approx. B+





4. Is the measured voltage within specification?






Signal Circuit Inspection

Check voltage
1. IG "OFF" and disconnect Cruise switch connector.
2. IG "ON"
3. Measure voltage between signal terminal of Cruise switch harness connector and chassis ground.

Specification : Approx. 5V





4. Is the measured voltage within specification?





Check short in harness
1. IG "OFF" and disconnect Cruise switch connector and ECM connector.
2. Measure resistance between signal and power terminals of Cruise switch harness connector.
3. Measure resistance between signal and ground terminals of Cruise switch harness connector.

Specification : Infinite





4. Is the measured resistance within specification?





Check open in harness
1. IG "OFF" and disconnect Cruise switch connector and ECM connector.
2. Measure resistance between signal terminal of Cruise switch harness connector and cruise signal terminal of ECM harness connector.

Specification : Approx. below 1 Ohm





3. Is the measured resistance within specification?