Mode Control Actuator Repair Procedures

Inspection

1. 1
   Turn the ignition off.
2. 2
   Disconnect the mode control actuator connector.
3. 3
   Make sure the mode control actuator moves to the defrost position when 12 V is applied to terminal 3 and ground terminal 4. Make sure the mode control actuator moves to the vent position when the connections are reversed.

   

   1. - 2. - 3. Defrost Mode 4. Sensor Ground

   5. Feedback signal 6. Sensor (+5V) 7. Vent mode

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

   Door Position	Voltage (V)	Fault Detection
   vent	1	Low voltage: 0.1 V or less
   Defrost	4.4	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 mode control actuator with a known good one and check for proper operation.
8. 8
   Replace the mode actuator if it is determined to be faulty.

Diagnosis Using GDS

1. 1
   The heating, ventilation and air conditioning system can quickly diagnose faulty components using the Generic Diagnostic System (GDS). The diagnostic system (GDS) provides the following information: (1) Self-diagnosis: Diagnostic Trouble Code (DTC) check and display. (2) Current data: Checking the input/output status of the system. (3) Actuation test: Checking the operating status of the system. (4) Additional functions: Other controls such as system option and zero point adjustment.
2. 2
   Select "Vehicle Model" and the system to be checked to inspect the vehicle with the tester.
3. 3
   Select the "CURRENT DATA" menu to check the current input/output status. The input/output data for the sensors related to the mode control actuator can be checked.

   

4. 4
   To perform a forced operation of the mode control actuator input factors, select "ACTUATION TEST".

   

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
   Lower the steering column after loosening the mounting bolts. (Refer to Steering System - "Steering Column and Shaft")
4. 4
   Remove the driver side air vent duct (A) after loosening the screw.

   

5. 5
   Disconnect the connector (A), then remove the mode control actuator (B) after loosening the mounting screws.

   

6. 6
   Install in the reverse order of removal.