Component Inspection

Air Conditioner
B1204 Air Mix Potentiometer Open (Low)-Passenger - Inspection/Repair:_:Component Inspection

Component Inspection

Check passenger air mix actuator
1. Ignition "OFF"
2. Disconnect passenger air mix actuator and connect A/C control unit main harness connector.
3. Connect (+) terminal of battery to WARM(+) of passenger air mix actuator and (-) terminal to COOL(-). (Component side)
4. Verify that the Air mix actuator(Temperature actuator) operates to the WARM position.
5. Verify that the Air mix actuator(Temperature actuator) operates to the COOL position with reverse connecting. ( COOL(+) and WARM(-) ). (Component side)

Specification :Refer the specifications in Fig.1)




Fig.1)





Fig.1) ** Function of the actuator motor according to terminal connection type. (observe safety regulations)
6. Is "Door position" display near the specified value?





Check potentiometer
1. Ignition "OFF"
2. Connect passenger air mix actuator and A/C control unit main harness connector.
3. Ignition "ON"
4. Measure voltage between Signal(F/B) terminal of passenger air mix actuator harness connector and Sensor ground(-) terminal of A/C-ECU harness connector. (Component side)

Specification :Refer the specifications in Fig.2)




Fig.2)





Fig.2) ** Voltage value of Air Mix potentiometer as a function of temp door position.
5. Is "voltage" display near the specified value?