Component Inspection

Air Conditioner
B1277 Air Mix Potentiometer-TEMP Open (Low)-Console - Inspection/Repair:_:Component Inspection

Component Inspection

Check Console temp A_actuator
1. Ignition "OFF"
2. Disconnect Console temp actuator "A" and connect A/C control unit main harness connector.
3. Connect (+) terminal of battery to WARM(+) of Console temp actuator "A" 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 Console temp actuator "A" and A/C control unit main harness connector.
3. Ignition "ON"
4. Measure voltage between Signal(F/B) terminal of Console temp actuator "A" 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 Console temp actuator "A" as a function of position of mode switch
5. Is "voltage" display near the specified value?