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.
|
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.
|
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:
Description and operation
Description
Due to the considerably more frequent occurrence of starting operations, the
electrical load that occurs often leads to voltage dips in the vehicle network.
In order to stabilize the power supply for certain voltage-sensitive electrical
comp ...
When the amount of refrigerant is low, the performance of the air conditioning
is reduced. Overfilling also has a negative influence on the air conditioning system.
Therefore, if abnormal operation is found, have the system inspected by an authorized
Kia dealer.
The refrigerant label is loca ...