W/Harness Inspection

P0533 A/C Refrigerant Pressure Sensor \'A\' Circuit High Input

Inspection/Repair - W/Harness Inspection

Terminal & 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 the A/C pressure sensor connector.
2. IG "ON"
3. Measure the voltage between power terminal of A/C pressure sensor harness connector and chassis ground.

Specification : Approx. 5 V




4. Is the measured voltage within specification?






Signal Circuit Inspection

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

Specification : Approx. 0 V




4. Is the measured resistance within specification?






Ground Circuit Inspection

Check open in harness
1. IG "OFF" and disconnect the A/C pressure sensor connector.
2. IG "ON".
3. Measure the voltage between power terminal of A/C pressure sensor harness connector and chassis ground. (Measurement "A")
4. Measure the voltage between power and ground terminals of A/C pressure sensor harness connector. (Measurement "B")

Specification : The Difference between "A" and "B" is below 200 mV.




5. Is the measured voltage within specification?