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

1. IG Key "OFF".
2. Disconnect the A/C pressure sensor connector.
3. IG Key "ON".
4. Measure the voltage between terminal 1 of A/C pressure sensor harness connector and chassis ground.

Specification : 5V





5. Is the measured voltage within specification ?






Signal Circuit Inspection

1. Check short to ground inspection
(1) IG Key "OFF".
(2) Disconnect A/C pressure sensor and PCM connector.
(3) Measure the resistance between terminal 2 of A/C pressure sensor harness connector and chassis ground.

Specification : Infinite





(4) Is the measured resistance within specification ?





2. Check open in harness
(1) IG Key "OFF".
(2) Disconnect A/C pressure sensor and PCM connector.
(3) Measure the resistance between terminal 2 of A/C pressure sensor harness connector and terminal 58/C130-A of PCM harness connector.

Specification : Approx. below 1 ohms





(4) Is the measured resistance within specification ?