W/Harness Inspection

Terminal and Connector inspection

1. Many malfunctions in the electrical system are caused by poor harness(es) 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 for Short to Power in Signal Circuit
1. IG KEY OFF.
2. Disconnect A/C pressure sensor harness connector.
3. IG KEY ON.
4. Measure voltage between signal terminal of A/C pressure S. harness connector and chassis ground.

Specification : Approx. 0V





5. Is voltage within specification?






Ground Circuit Inspection

Check for Open in Ground Circuit
1. IG KEY OFF.
2. Disconnect A/C pressure S. harness connector and PCM harness connector.
3. Measure resistance between both ends of ground line.

Specification : Below 1 Ohm





4. Is resistance within specification?