Inspection

1.	Ignition "OFF"

2.	Disconnect the connector of temperature control actuator.

3.

Verify that the temperature control actuator operates to the hot position when connecting 12V to the terminal 4 and grounding terminal 3 Verify that the temperature control actuator operates to the cool position when connecting in the reverse. 1. - 2. - 3. Cool position 4. Hot position 5. Sensor (+5V) 6. Feedback signal 7. Sensor ground

4.	Check the voltage between terminals 6 and 7. Specification Door position Voltage (6-7) Error detecting Max. cooling 0.45 ± 0.15V Low voltage : 0.1V or less Max. heating 4.55 ± 0.15V High voltage : 4.9V or more It will feedback current position of actuator to controls.

5.	If the measured voltage is not specification, substitute with a known-good temperature control actuator and check for proper operation.

6.	If the problem is corrected, replace the temperature control actuator.

Replacement

1.	Disconnect the negative (-) battery terminal.

2.	Remove the heater & blower unit. (Refer to HA group - "Heater Unit")

3.	Remove the heater unit from the blower unit. (Refer to HA group - "Heater Unit")

4.	Loosen the mounting screws and then remove the temperature control actuator (A).