Component Inspection

Air Conditioner
B1250 Direction Potentiometer Short (High)-Driver - Inspection/Repair:_:Component Inspection

Component Inspection

Check Driver Direction actuator
1. Ignition "OFF"
2. Disconnect Driver Direction actuator and connect A/C control unit main harness connector.
3. Connect(+) terminal of battery to DEF(+) of Driver Direction actuator and (-) terminal to VENT(-). (Component side)
4. Verify that the Driver Direction actuator operates to the DEF position.
5. Verify that the Driver Direction actuator operates to the VENT position with reverse connecting. (VENT(+) and DEF(-) ). (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 Direction actuator and A/C control unit main harness connector.
3. Ignition "ON"
4. Measure voltage between Signal(F/B) terminal of Driver Direction 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 Direction potentiometer as a function of position of mode switch
5. Is "voltage" display near the specified value?