Component Inspection

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 A/C control unit main harness connector.
3. Connect (+) terminal of battery to WARM (+) of Driver Direction 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) ** 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) ** Voltage value of Direction potentiometer as a function of position of mode switch





5. Is "voltage" display near the specified value?