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) Service Manual: Drive Belt Repair procedures
Removal 1. Remove the drive belt. (1) Using the wrench, turning the drive belt tensioner (A) counterclockwise. (2) Disconnect the drive belt (A). (3) Remove the drive belt tensioner (A) and then remove the drive belt (B). Inspection 1. Check belt for maintenance and abnormal wea ...

Hyundai Elantra AD (2016-2020) Service Manual: Variable Charge Motion Actuator (VCMA) Description and Operation
Description The Variable Charge Motion Actuator (VCMA) is installed on the inlet of the intake manifold. It consists of a DC motor which actuates the VCM valve and a position sensor which detects the position of the VCM valve. The VCM system tumbles air flow entering into combustion chambe ...

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