KIA Niro: In-car Sensor

In-car Sensor Description and operation


The in-car air temperature sensor is built into the heater & A/C control unit.

The sensor consists of a thermistor that measures the temperature inside the vehicle. The signal decided by the resistance that varies with the perceived inside temperature, is delivered to the heater control unit, based on which the unit regulates the in-car temperature to intended value.


  1. Disconnect the negative (-) battery terminal.
  2. Remove the center fascia lower panel.

    (Refer to Body - "Center Fascia Panel")

  3. Loosen the screw and remove the heater and air conditioner control unit (A).

  1. Remove the heater and the air conditioning control unit connector (A).

  1. Disconnect the room temperature sensor connector (A).

  1. Press the fixing pin and remove the room temperature sensor (A).

  1. Install in the reverse order of removal.


  • Make sure that the connector is connected properly.
  • Replace any damaged clips.

Photo Sensor


The photo sensor is located at the center of the defrost nozzles.

The photo sensor contains a photovoltaic (sensitive to sunlight) diode. The solar radiation received by its light receiving portion, generates an electromotive force in proportion to the amount of radiation received which is transferred to the automatic temperature control module so that the solar radiation compensation will be performed.


  1. Switch "ON" the ignition.
  2. Connect the KDS.
  3. Emit intensive light toward the photo sensor using a lamp, and check the change in output voltage.
  4. The voltage will rise with higher intensive light and fall with lower intensive light.

  1. Auto light signal
  2. Auto light ground
  3. Photo signal (RH)
  4. LED battery (+)
  5. LED signal
  6. Photo DRV
  7. Photo power
  8. Auto light power


  1. Disconnect the negative (-) battery terminal.
  2. By using a screw driver or a remover, and remove the photo-sensor (A) and remove the connector (B).

  1. Install in the reverse order of removal.


     Ambient Temperature Sensor | Auto Defogging Sensor

    Description Located at the front of the condenser, the ambient temperature sensor detects the ambient air temperature. It is a negative type thermistor; resistance will increase at lower temperature and decrease at higher temperature. The sensor

     Duct Sensor Repair procedures

    Inspection Check that the voltage between No. 1 and 2 duct sensors change. Sensor (+ 5V) Sensor ground Specification Replacement Duct sensor - Floor Disconnect the negative (-) battery terminal. Remove the crash pad low


     Opening the hood

    (Kia Niro Hybrid only) Hood release lever Hood secondary latch Hood Operation Pull the hood release lever (1).  Push the secondary latch (2) to the left. Lift the hood (3) upwards. Go to the front of the vehicle, raise

     Body Control Module (BCM) / Description And Operation

    Specifications Schematic Diagrams Connector Pin Information Description Body Control Module (BCM) function Washer Linked Wiper If the washer switch is pressed ON for 0.06-0.2 second with the