Refrigerant Pressure Sensor / Switch: Testing and Inspection

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

1. INSPECT AIR CONDITIONING PRESSURE SENSOR

(a) Check the wire harness.

(1) Disconnect the A55 air conditioning pressure sensor connector.

(2) Disconnect the I77 air conditioning amplifier assembly connector.

(3) Measure the resistance according to the value(s) in the table below.

Standard Resistance:





If the resistance is not as specified, repair the wire harness.

(4) Reconnect the I77 air conditioning amplifier assembly connector.

(5) Turn the ignition switch to ON.

(6) Measure the voltage according to the value(s) in the table below.

Standard Voltage:





If the voltage is not as specified, repair the wire harness or replace air conditioning amplifier assembly.

(b) Check the air conditioning pressure sensor.

(1) Connect the connector to the air conditioning pressure sensor.

(2) Install a manifold gauge set.

(3) Warm up the engine.

(4) Turn the A/C switch on.

(5) Measure the voltage according to the value(s) in the table below.





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

Standard Voltage:





If the voltage is not as specified, replace the air conditioning pressure sensor.

Text in Illustration