Hyundai Sonata: Air Conditioning System / 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 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.
With a flat-head screwdriver, remove the photo sensor (A) from the center of the defrost nozzle after disconnecting the connector (B).

3.
Install in the reverse order of removal.
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 r ...

Ambient Temperature Sensor 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; resistance will increase with lower te ...

Other information:

Hyundai Sonata LF 2014-2019 Owners Manual: AFLS (Adaptive Front Lighting System) a.k.a. DBL (Dynamic Bending Light)
Adaptive front lighting system uses the steering angle and vehicle speed to help maximize your field of vision by swiveling and leveling the headlamp. Change the switch to the AUTO position when the engine is running. The adaptive front lighting system will operate when the headlamps are ON. To t ...

Hyundai Sonata LF 2014-2019 Service Manual: Rear Hub Assembly Repair procedures
Replacement 1. Raise the vehicle, and make sure it is securely supported. 2. Remove the wheel cap (A).     Be careful not to damage to the wheel cap (A) when removing the it. 3. Remove the front wheel and tire (A) from front hub. Tightening torque : 88.2 ~ 107. ...

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