W/Harness Inspection

Engine Control
P0647 A/C Clutch Relay Control Circuit High - 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?






A/C COMP. Cut Signal Circuit Inspection

Check Short to Battery in harness
1. IG "OFF" and disconnect A/C Control Module connector.
2. IG "ON".
3. Measure voltage between battery A/C COMP. cut signal terminals of A/C Control Module harness connector and chassis ground.

Specification : Approx. 2.5 V








4. Is the measured voltage within specification?