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: Evaporator Core Repair procedures
Replacement 1. Disconnect the negative (-) battery terminal. 2. Remove the heater and blower assembly. (Refer to Heater - "Heater Unit") 3. Remove the heater unit lower case (A) after loosening the mounting screws. 4. Pull out the evaporator core (A) from the heater unit. 5. T ...

Hyundai Elantra AD (2016-2020) Service Manual: Passenger Airbag (PAB) Module Description and Operation
Description Passenger Airbag (PAB) module is located in the passenger crash pad. This PAB contains 2 firing squibs of airbag. Depending of crash speed or the tightening of seat belt, it is decided a timing about both 2 firing squibs of airbag.     • Never attempt to ...

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