Component Inspection

Component Inspection

Check DR Air Mix actuator.
1. Check actuator motor
(1) Ignition "OFF".
(2) Disconnect DR Air Mix actuator.
(3) Connect (+) terminal of battery to terminal 3 of Air Mix actuator and (-) terminal to terminal 4
(4) Verify that the temperature actuator operates to the cool position
(5) Verify that the temperature actuator operates to the warm 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 Air Mix actuator.
(3) Measure voltage between terminal "6" and "7" of Air Mix actuator while operating the temp switch.

Specification : Refer the specifications in fig 3)




Fig.3)





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





Check A/C Control Unit
1. Engine "ON".
2. Connect A/C Control Unit.
3. Measure voltage between terminal "16" and "17" of A/C Control Unit while operating the temp switch.

Specification : Approx. 12V




4. Is the measured voltage within specifications ?