1.The photo sensor is located at the center of the defrost nozzles.
2.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.
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)
1.Disconnect the negative (-) battery terminal.
2.Remove the crash pad upper garnish (A).

3.After removing the crash pad upper garnish, insert hand and push up the photo sensor (A) from the inside to remove it.

4.Disconnect the photo sensor connector (A).

5.To install, reverse removal procedure.
In-car Sensor
Ambient SensorHyundai Tucson (NX4) 2022-2026 Service Manual: Power Seat Control Switch
- Circuit Diagram
Driver Power Seat Swtich
Passenger Power Seat Swtich
- Inspection
1.With the power seat switch in each position, make sure that
continuity exists between the terminals below. If continuity is not as
specified, replace the power seat switch.
Driver Power Seat C ...
Hyundai Tucson (NX4) 2022-2026 Service Manual: Repair procedures
- Service Adjustment Procedure
Steering Wheel Play Inspection
1.Turn the steering wheel so that the front wheels can face straight ahead.
2.Mark the center of the steering wheel.
3.Measure the distance that the steering wheel can be turned with out moving the front wheels.Standard value : ...