Refrigerant Pressure Sensor / Switch: Testing and Inspection

AIR CONDITIONING: AIR CONDITIONING PRESSURE SENSOR: ON-VEHICLE INSPECTION

1. INSPECT PRESSURE SENSOR

(a) Check the wire harness.

Text in Illustration:

(1) Disconnect the connector of the pressure sensor.

(2) Using an ohmmeter, measure the resistance of the wire harness side connector.

Standard resistance:





(3) Turn the ignition switch to ON.

(4) Measure the voltage of the wire harness side connector.

Standard voltage:





(b) Check the pressure sensor.

Text in Illustration:

(1) Set the manifold gauge.

(2) Connect the connector to the pressure sensor.

(3) Warm up the engine.

(4) Switch A/C ON.

(5) Using a voltmeter, measure the voltage between connector terminals 6 (PRE) and 11 (SG-1) of the air conditioner amplifier.

HINT
Check from the rear of the connector while it is connected to the air conditioning amplifier.

Standard voltage: