Air Door Actuator / Motor: Testing and Inspection

AIRMIX DAMPER SERVO SUB-ASSEMBLY




a. Inspect servomotor operation.
1. Connect the positive (+) lead from the battery to terminal 4 and negative (-) lead to terminal 5, then check that the arm turns to "COLD" side smoothly.
2. Connect the positive (+) lead from the battery to terminal 5 and negative (-) lead to terminal 4, then check that the arm turns to "HOT" side smoothly.
If operations are not as specified, replace the air mix servomotor.










b. Inspect position sensor resistance.
Measure resistance between terminals at servomotor arm each position as shown in the chart.
If resistance is not as specified, replace the servomotor.







MODE DAMPER SERVO SUB-ASSEMBLY
a. Inspect servomotor operation.
1. Connect the positive (+) lead from the battery to terminal 7 and the negative (-) lead to terminal 8.
2. Connect the negative (-) lead from the battery to each terminal as shown in the chart, and check that the shaft rotates at each position, as shown in the illustration.
If operation is not as specified, replace the servomotor.




RECIRCULATION DAMPER SERVO SUB-ASSEMBLY
a. Inspect servomotor operation.
1. Connect the positive (+) lead from the battery to terminal 5 and negative (-) lead to terminal 1, then check that the arm turns to "REC" side smoothly.
2. Connect the positive (+) lead from the battery to terminal 5 and negative (-) lead to terminal 2, then check that the arm turns to "FRS" side smoothly.
If operations are not as specified, replace the mode damper servomotor.