Refrigerant Pressure Sensor / Switch: Testing and Inspection

AIR CONDITIONING PRESSURE SENSOR

ON-VEHICLE INSPECTION




1. INSPECT PRESSURE SENSOR
a. Check the wire harness.
1. Disconnect the connector of the pressure sensor.




2. Using an ohmmeter, measure the resistance of the wire harness side connector.
3. Turn the ignition switch ON.




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




b. Check the pressure sensor.
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 the it is connected to the air conditioning amplifier.