Hyundai Elantra: 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.
In-car Sensor Repair procedures
Diagnosis With GDS 1. The heating, ventilation and air conditioning can be quickly diagnosed failed parts with vehicle diagnostic system (GDS). ? The diagnostic system (GDS) provides the follow ...

Photo Sensor 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 ri ...

Other information:

Hyundai Elantra AD (2016-2020) Owners Manual: Headlight Warning Light, LED Headlight Warning Light
Headlight Warning Light This warning light illuminates: This warning light illuminates if one of the exterior bulbs (headlamp, DRL, turn signal lamp, stop lamp, etc.) is not operating properly. One of the bulbs may need to be replaced. If the vehicle is equipped with LED headlamps, have the ...

Hyundai Elantra AD (2016-2020) Service Manual: Description and Operation
Description This specification applies to HCU(Hydraulic Control Unit) and ECU(Electronic Control Unit) of the HECU.(Hydraulic and Electronic Control Unit) This specification is for the wiring design and installation of ABS ECU. This unit has the functions as follows. - Input of signal fr ...

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