Component Inspection

Component Inspection

Check actuator
1. Ignition "OFF"
2. Disconnect DR Air Mix Potentiometer.
3. Verify that the temperature actuator operates to the hot position when connecting 12V to the terminal 1 and grounding terminal 2.
4. Verify that the temperature actuator operates to the cool position when connecting in the reverse.




5. Dose the actuator work properly ?





Check potentiometer
1. Ignition "ON"
2. Connect DR Air Mix Actuator
3. Measure voltage between terminal "3" and "4" of DR AIR MIX potentiometer while operating the temp switch.

Specification : Refer the specifications in fig. 5)













Fig. 5) Specifications : Voltage value of Air Mix potentiometer as a function of position of temperature door.
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 "9" and "22" of A/C Control Unit while operating the temp switch.

Specification : Approx. 12V




4. Is the measured voltage within specifications ?