Kia Rio: Air Conditioning System / Photo Sensor (FATC only)
Description and operation
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
1. |
Turn the ignition switch ON.
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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
|
|
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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Description and operation
Description
The evaporator temperature sensor will detect the evaporator core temperature
and interrupt compressor relay power in order to prevent evaporator ...
Description and operation
Description
The ambient temperature sensor is located at the front of the condenser and detects
ambient air temperature. It is a negative type thermistor; res ...
Other information:
Repair procedures
Disassembly
•
Use fender covers to avoid damaging painted surfaces.
•
To avoid damaging the cylinder head, wait until the engine c ...
1. Open the hood.
2. Remove the bulb-socket from the headlamp assembly by turning the bulb-socket
counterclockwise until the tabs on the bulb-socket align with the slots on the headlamp
assembly.
3. Remove the bulb from the bulbsocket by pressing it in and rotating it counterclockwise
unti ...