Component Inspection

Air Conditioner
B1245 Air Mix Potentiometer Open (Low)-Driver - Component Inspection

Component Inspection

Check driver temperature control actuator
1. Ignition "OFF"
2. Disconnect driver temperature control actuator and A/C control unit main harness connector.
3. Connect (+) terminal of battery to WARM (+) of driver temperature control actuator and (-) terminal to COOL (-). (Component side)
4. Verify that the Air mix actuator (Temperature actuator) operates to the cool position.
5. Verify that the Air mix actuator (Temperature actuator) operates to the warm position with reverse connecting. (WARM (+) and COOL (-)). (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 driver temperature control actuator and A/C control unit main harness connector.
3. Ignition "ON"
4. Measure voltage between Signal (F/B) terminal of driver temperature control 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 temperature control actuator (Air mix potentiometer) as a function of temp door position.
5. Is "voltage" display near the specified value?