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

Kia Rio 2017-2023 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.

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.

❮Evaporator Temperature Sensor

Description and operation Description The evaporator temperature sensor will detect the evaporator core temperature and interrupt compressor relay power in order to prevent evaporator freezing by excessive cooling.

Ambient Temperature Sensor❯

Description and operation Description The ambient temperature sensor is located at the front of the condenser and detects ambient air temperature.

Other information:

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Components and components location Components Repair procedures Removal When replacing the LDWS switch, check that the symbol mark in the cluster operates normally by pressing the ON/OFF switch.

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