Component Inspection

Air Conditioner

Air Conditioner - B1249 Direction Potentiometer Open (Low)-Driver - Component Inspection

Component Inspection

Check A/C Control Unit
1. Engine "ON".
2. Disconnect DR Direction Actuator.
3. Measure voltage value between terminal "1" of A/C control unit and chassis ground.

Specification : 5 V




4. Is the measured voltage within specifications?





Check DR Direction Actuator.
1. Check actuator motor
(1) Ignition "OFF".
(2) Disconnect DR Direction Actuator.
(3) Connect (+) terminal of battery to terminal 3 of Direction Actuator and (-) terminal to terminal 4
(4) Verify that the temperature actuator operates to the DEF position
(5) Verify that the temperature actuator operates to the VENT position with reverse connecting. ((+) to 4 and (-) to 3)




(6) Dose the actuator work properly?





2. Check actuator potentiometer
(1) Ignition "ON".
(2) Connect DR Direction Actuator.
(3) Measure voltage between terminal "5" and "6" of DR Direction Actuator while operating the temp switch.

Specification : Refer the specifications in fig 3)




Fig.3)





Fig.3) Specifications : Voltage value of Direction potentiometer as a function of temp door position.
(4) Is the measured voltage within specifications in fig 3)?