Temperature Control Actuator Repair Procedures

Inspection

1. 1
   Turn the ignition off.
2. 2
   Disconnect the temperature control actuator connector.
3. 3
   Check that the temperature control actuator moves to the warm position when 12 V is applied to terminal 3 and terminal 4 is grounded. Check that the temperature control actuator moves to the cool position when the connection is reversed.

   

   1. - 2. - 3. Warm position 4. Sensor ground

   5. Feedback signal 6. Sensor (+5V) 7. Cool position

4. 4
   Connect the temperature control actuator connector.
5. 5
   Turn the ignition on.
6. 6
   Check the voltage between terminals 4 and 5. Specification

   Door Position	Voltage (V)	Fault Detection
   Max. Cool	0.3 ± 0.15 V	Low voltage: 0.1 V or less
   Max. Heat	4.7 ± 0.15 V	High voltage: 4.9 V or more

   
   It will report the current actuator position to the controls.
7. 7
   If the measured voltage does not meet the specification, replace the temperature control actuator with a known good one and check operation.
8. 8
   If the problem is resolved, replace the temperature control actuator.

Replacement

1. 1
   Disconnect the negative (-) battery terminal.
2. 2
   Remove the emergency pad lower panel. (Refer to Body - "Emergency Pad Lower Panel")
3. 3
   Remove the driver side air vent duct (A) after loosening the screw.

   

4. 4
   Disconnect the connector (A), then remove the temperature control actuator (B) after loosening the mounting screws.

   

5. 5
   Install in the reverse order of removal.
6. 6
   Disconnect the negative (-) battery terminal.
7. 7
   Remove the heater and blower assembly. (Refer to Heater - "Heater")
8. 8
   Separate the blower unit from the heater unit by removing the 3 screws.

   

   

9. 9
   Disconnect the connector (A), then remove the temperature control actuator (B) after loosening the mounting screws.

   

10. 10
    Install in the reverse order of removal.