Hyundai Santa Fe (TM): Air conditioning System / Photo Sensor. Repair procedures

Inspection
1.
Emit intensive light toward the photo sensor using a lamp, and check the output voltage change.
2.
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 (SW)
8. Auto light power (5V)

Replacement
1.
Disconnect the negative (-) battery terminal.
2.
Using a screwdriver or remover, remove the photo sensor (A).

3.
Press the lock pin, separate the photo sensor connector (A).

4.
Install in the reverse order of removal.

    Description The photo sensor is located at the center of the defrost nozzles. The photo sensor contains a photovoltaic (sensitive to sunlight) diode.

    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 temperature, and decrease with higher temperature.

    Other information:

    Hyundai Santa Fe (TM) 2019-2023 Service and Repair Manual: Rear Occupant Alert

    Description and operation Description The system detects the passenger in the vehicle and prevents the driver from getting off the vehicle with the passenger in the back. - 1st warning: If you open the driver's door after you open and then close the rear passenger and turn the engine off, the system provides warn

    Hyundai Santa Fe (TM) 2019-2023 Service and Repair Manual: Evaporator Temperature Sensor. Repair procedures

    Inspection 1. Turn the ignition switch OFF. 2. Disconnect the evaporator temperature sensor connector. 3. Measure resistance between terminal "+" and "-" of the evaporator temperature sensor.

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