Refrigerant Pressure Sensor / Switch: Testing and Inspection

AIR CONDITIONING: PRESSURE SWITCH: ON-VEHICLE INSPECTION

1. CHECK A/C PRESSURE SENSOR






(a) Check the wire harness.
(1) Disconnect the connector from the pressure sensor.
(2) Measure the resistance of the wire harness side connector.
Standard resistance:





(3) Measure the voltage of the wire harness side connector.
Standard voltage:










(b) Check the pressure sensor.
(1) Set the manifold gauge.
(2) Connect the connector to the pressure sensor.
(3) Warm up the engine.
(4) A/C switch is turned ON.
(5) Measure the resistance according to the value(s) in the table below.
Standard voltage:






If the result is not as specified, replace the sensor.