Kia Rio: Air Conditioning System / Photo Sensor (FATC only)

Kia Rio 2017-2021 YB Service Manual / Heating,Ventilation, Air Conditioning / Air Conditioning System / Photo Sensor (FATC only)

Description and operation
Description

The photo sensor is located at the center of 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.

Repair procedures
Inspection
1.

Turn the ignition switch ON.

2.

Connect the GDS.

3.

Emit intensive light toward photo sensor using a lamp, and check the output voltage change.

4.

The voltage will rise with higher intensive light and reduce with lower intensive light.

1. Auto light sensor signal
2. Auto light sensor ground
3. Passenger side photo sensor
4. LED (Power)
5. LED (Signal)
6. Driver side photo sensor
7. Photo sensor power
8. Auto light sensor power

Replacement
1.

Disconnect the negative (-) battery terminal.

2.

With a flat-head screwdriver, remove the photo sensor (A) from the center of defrost nozzle after disconnecting the connector (B).

3.

Install in the reverse order of removal.

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