Check Actuator Operation

Preparation tool: 

Circuit tester 

1. Check the actuator operation when battery voltage is applied between the terminals of air mix door actuator.
   CAUTION: Disconnect the battery immediately after the actuator stops operation. Otherwise, the motor may be damaged.

   Terminal No.	Inspection conditions	Operating position	Connection diagram
   6 (+) - 7 (-)	Connect battery to the terminals	Driver's seat: COOL Passenger's seat: HOT
   7 (+) - 6 (-)		Driver's seat: HOT Passenger's seat: COOL

2. Check the resistance between terminals of the air mix door actuator.

   Terminal No.	Inspection conditions	Standard	Connection diagram
   1 - 3	Always	4.2 - 7.8 Ω

3. Connect the air mix door actuator connector, turn the ignition switch to ON and check the voltage between terminals of the air mix door actuator.
   • Driver's seat

     Terminal No.	Inspection conditions	Standard	Connection diagram
     5 (+) - 3 (-)	HOT	Approx. 1.0 V
     	COOL	Approx. 4.0 V

   • Passenger's seat

     Terminal No.	Inspection conditions	Standard	Connection diagram
     5 (+) - 1 (-)	HOT	Approx. 1.0 V
     	COOL	Approx. 4.0 V

4. Replace the air mix door actuator if it is found defective.