Component Inspection

Component Inspection

Check actuator motor
1. Ignition "OFF"
2. Disconnect DR Air mix potentiometer.
3. Connect (+) terminal of battery to terminal 3 of Air mix potentiometer and (-) terminal to terminal 4
4. Verify that the temperature actuator operates to the hot position
5. Verify that the temperature actuator operates to the cool position with reverse connecting. ((+) to 4 and (-) to 3)




6. Dose the actuator work properly ?
YES
1) Go to "Check potentiometer" procedure.
NO
1) Substitute with a known-good actuator and check for proper operation. If the problem is corrected, replace actuator and then go to "Verification of Vehicle Repair" procedure.
Check potentiometer
1. Ignition "ON"
2. Connect DR Air mix potentiometer
3. Measure voltage between terminal "5" and "6" of DR Air mix potentiometer while operating the temp switch.
A. Specification : Refer the specifications in fig 3)













4. Is the measured voltage within specifications in fig 3) ?
YES
1) Check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to "Verification of Vehicle Repair" procedure.
NO
1) Substitute with a known-good actuator and check for proper operation. If the problem is corrected, replace actuator and then go to "Verification of Vehicle Repair" procedure.