Hyundai Tucson LM Quiz
Heating, Ventilation, and Air Conditioning

Photo Sensor Repair Procedures

In this manual: Heating, Ventilation, and Air Conditioning
General Information — 1Engine Mechanical System — 44Engine Electrical System — 45Emission Control System — 24Engine Control System/Fuel System — 93Clutch System — 13Manual Transmission — 18Automatic Transmission — 87Four-Wheel Drive (4WD) System — 26Drive Shaft and Axle — 29Suspension System — 35Steering — 20Restraints — 47Brake System — 36Body (Interior and Exterior) — 53Body Electrical System — 202Heating, Ventilation, and Air Conditioning — 58
7steps
~42min
2/5difficulty
Done 0 of 7

Inspection

  1. Ignition switch ON
  2. Using a scan tool.
  3. Direct intense light onto the photo sensor using a lamp, and check the change in output voltage.
  4. The voltage will increase with more intense light and decrease with less intense light.
    1. Photo sensor ground
    2. 5 V DC
    3. Photo sensor signal    		 4. -
    5. Photo sensor (+)
    6. Photo sensor (-)

Replacement

  1. Disconnect the negative (-) battery terminal.
  2. Using a flat-blade screwdriver (-), remove the photo sensor (A) from the center of the defrost nozzle.
  3. Install in the reverse order of removal.

Test yourself

A quick Hyundai Tucson LM quiz: every answer comes with an explanation and a link to the manual page.