Hyundai Genesis (DH): Air Conditioning System / Photo Sensor Description and Operation
The photo sensor is located in the right side of the inside rearview mirror.
he integrated rain sensor is located in the right side of the
inside rearview mirror. The integrated rain sensor is a multifunctional
sensor which combines the photo sensor and auto light sensor, and has a
built-in photovoltaic diode (for detecting the amount of solar
radiation). The electromotive force, which is generated in proportion to
the detected radiation quantity, is transferred to the automatic
temperature control module to compensate air flow and discharge
temperature in the air conditioning system.

Inspection
1.
Turn the ignition switch ON.
2.
Blow warm air into the in-car sensor air inlet. Measure the sensor resistance between 1 and 3 terminals.
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.
Other information:
D
Removal
1.
If the compressor is marginally operable, run the engine at
idle speed, and let the air conditioning work for a few minutes, then
shut the engine off.
2.
Disconnect the negative (-) battery terminal.
3.
Remove the engine room cover.