Temperature Control Actuator Repair Procedures

Inspection

1. 1
   Turn the ignition switch to the OFF position.
2. 2
   Disconnect the temperature control actuator connector.
3. 3
   Make sure the temperature control actuator operates in the COLD position when 12 V is applied to terminal 3 and ground terminal 7. Make sure the temperature control actuator operates in the HOT position when the connections are reversed.

   

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

   5. Actuator with feedback 6. Sensor (+5V) 7. Cold position

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

   Door Position	VOLTAGE (V)	Fault Detection
   Maximum Cooling	0.5 ± 0.15 V	Low voltage: 0.1 V or less High voltage: 4.9 V or more
   Maximum Heating	4.5 ± 0.15 V

   
   There will be feedback on the current position from the actuator to the control unit.
7. 7
   If the measured voltage is not within the specification, replace the temperature control actuator with a known good one and check that it operates properly.
8. 8
   If there is a problem with the temperature control actuator, replace it.

Diagnosis with GDS

1. 1
   The heating, ventilation and air conditioning (HVAC) system can be diagnosed quickly (defective parts) using the Global Diagnostic System (GDS). ※ The GDS provides the following information. (1) Self-diagnosis: checks and displays diagnostic trouble codes (DTC). (2) Current data: checks the status of input/output signals. (3) Active test: checks system operating conditions. (4) Additional functions: in addition to control, such as zero point adjustment.
2. 2
   Select the "Vehicle Model" and the system to be checked in order to inspect the vehicle with the scan tool.
3. 3
   Select the "Current Data" menu to check the current status of the input/output data. The input/output data for the sensors corresponding to the temperature control actuator can be checked.

   

4. 4
   To perform a forced operation on the inputs of the temperature control actuator, select "ACTUATOR TEST" in the temperature control menu.

   

REPLACEMENT

1. 1
   Disconnect the negative (-) battery terminal.
2. 2
   Remove the lower airbag panel. (Refer to Body - "Lower Instrument Panel")
3. 3
   Remove the driver side spray hose (A) after loosening the clamp.

   

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

   

5. 5
   To install, perform the removal procedure in reverse order.