Kia Forte: Air Conditioning System / Photo Sensor

Kia Forte 2019-2021 (BD) Service Manual / Heating, Ventilation and Air Conditioning / Air Conditioning System / Photo Sensor

Description and operation
Description

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.

Repair procedures
Inspection
1.

Turn the ignition switch ON.

2.

Connect the GDS.

3.

Emit intensive light toward the 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 signal
2. Auto light ground
3. Photo signal (RH)
4. LED power (B+)
5. LED ground (To BCM)
6. Photo signal (LH)
7. Photo power
8. Auto light power (5V)

Replacement
1.

Disconnect the negative (-) battery terminal.

2.

Using a scraper or remover, remove the photo sensor (A).

3.

Disconnect the photo sensor connector (A).

4.

To install, reverse the removal procedure.

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