Kia Stonic Quiz
Heating, Ventilation, and Air Conditioning

Automatic defogging actuator

In this manual: Heating, Ventilation, and Air Conditioning
General Information — 8Maintenance — 31Engine Mechanical — 49Engine Electrical — 15Emission control system — 11Engine Control System/Fuel System — 45Clutch System — 12Manual Transaxle System — 11DCT (Dual Clutch Transmission) System — 16Drive Shafts and Axles — 9Suspension — 16Steering — 10restraint system — 15Braking system — 22Body (Interior and Exterior) — 89Rear Seat — 16Electrical System — 25Electrochromic Interior Rear View Mirror — 64Heating, Ventilation, and Air Conditioning — 31
12steps
~72min
3/5difficulty
Done 0 of 12

Description and Operation

Description

The automatic defogging sensor is mounted on the windshield and detects moisture; the blower is activated to prevent fogging and thus provide better visibility and comfort. The air conditioning control unit receives the signal from the sensor and controls the defogging function by operating the intake actuator, air conditioning, automatic defogging actuator, blower speed and mode actuator.

repair procedures

TEST

  1. Turn the ignition "OFF".

  2. Disconnect the connector from the automatic defogging actuator.

  3. Apply power (+) to terminal 3 of the mode actuator connector and ground (-) to terminal 7. Then check whether the motor operates in the defrost mode. Reverse the connections to check whether the reverse operation occurs.

  4. Connect the connector to the automatic heater actuator sensor.

  5. Turn the ignition "ON".

  6. Check the feedback potentiometer. To do this, measure the voltage between terminals 4 and 5.

    1. -
    2. -
    3. OPEN (clockwise)
    4. Sensor REF (+5 V)    		 5. Actuator feedback
    6. Sensor ground
    7. CLOSE (counterclockwise)

    SPECIFICATIONS

    Door position VOLTAGE (V) Fault detection
    DEF (ON) 1.7 ± 0.15 V Low voltage: 0.6 V or less
    DEF (OFF) 4.7 ± 0.15 V High voltage: 4.7 V or more

    The current position is reported to the actuator for control.

  7. If the measured voltage does not meet the specification, replace with a known good automatic heater actuator.

8th.

If the problem is proven to persist with the automatic defogging actuator, replace the actuator.

REMOVAL AND INSTALLATION

  1. Disconnect the battery ground cable.

  2. Remove the glove box housing.

    (Refer to Body - "Glove Box Housing")

  3. Loosen the mounting screw and remove the passenger-side footwell air duct (A).

  4. Disconnect the connector, then remove the automatic defogging actuator (A) after loosening the screws.

  5. Installation is the reverse of removal.

Test yourself

A quick Kia Stonic quiz: every answer comes with an explanation and a link to the manual page.