W/Harness Inspection

P0532 A/C Refrigerant Pressure Sensor A Circuit Low Input

Inspection/Repair - 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?
YES
1) Repair as necessary and go to "Verification of Vehicle Repair" procedure.
NO
1) Go to "Power Circuit Inspection" procedure.

Power Supply Circuit Inspection

1. Key "OFF".
2. Disconnect the A/C pressure sensor connector.
3. key "ON".
4. Measure the voltage between terminal 3 of A/C pressure sensor harness connector and chassis ground.
A. Specification : 5 V




5. Is the measured voltage within specification?
YES
1) Go to "Signal circuit inspection" procedure.
NO
1) Repair Open or Short to ground in A/C pressure sensor power circuit and go to "Verification of Vehicle Repair" procedure.

Signal Circuit Inspection

1. Check short to ground
(1) 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.
A. Specification : Infinite




(4) Is the measured resistance within specification?
YES
1) Go to "Check open in harness" procedure.
NO
1) Repair Short to ground in A/C pressure sensor signal circuit and go to "Verification of Vehicle Repair" procedure.
2. Check open in harness
(1) 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 79/C01-1 of PCM harness connector. [A/T]
Measure the resistance between terminal 2 of A/C pressure sensor harness connector and terminal 40/C01 of ECM harness connector. [M/T]
A. Specification : Approx. below 1 Ohms




(4) Is the measured resistance within specifications?
YES
1) Go to "Component inspection" procedure.
NO
1) Repair Open in signal circuit and go to "Verification of Vehicle Repair" procedure.