Hyundai Palisade (LX2): Air conditioning System / Auto Defogging Sensor

Description and operation

Description
The auto defogging sensor is installed on the front window glass. The sensor judges and sends signal if moisture occurs to blow out wind for defogging. The air conditioner control module receives signal from the sensor and restrains moisture and eliminate defog by controlling the intake actuator, A/C, auto defogging actuator, blower motor rpm, and mode actuator.

Repair procedures

Inspection
To inspect and diagnose the sensor, refer to Self-Diagnosis procedure and DTC guide.
Replacement
Hyundai Palisade. Repair procedures   
When removing with a flat-tip screwdriver or remover, wrap protective tape around the tools to prevent damage to components.
Put on gloves to prevent hand injuries.
1.
Disconnect the negative (-) battery terminal.
2.
Remove the rain sensor inner cover (A).

Hyundai Palisade. Repair procedures

3.
Remove the rain sensor cover (A).

Hyundai Palisade. Repair procedures

4.
Separate the auto defogging sensor connector (B) and remove the auto defogging sensor (A).

Hyundai Palisade. Repair procedures

5.
Install in the reverse order of removal.
Hyundai Palisade. Repair procedures   
Be careful to damage the windshield glass.
Make sure the hood latch release cable is connected properly.

    Description and operation Description The ambient temperature sensor is located at the front of the condenser and detects ambient air temperature.

    Description and operation Description The cluster ionizer makes disinfection and decomposition of bad smell from the air-conditioner or inflow air.

    Other information:

    Hyundai Palisade (LX2) 2020-2025 Service Manual: Troubleshooting

    Troubleshooting Problem Symptoms Table Before replacing or repairing air conditioning components, first determine if the malfunction is due to the refrigerant charge, air flow or compressor. Use the table below to help you find the cause of the problem.

    Hyundai Palisade (LX2) 2020-2025 Service Manual: A/C Pressure Transducer

    Description and operation Description The A/C Pressure Transducer (APT) converts the pressure value of high pressure line into voltage value after measuring it. By converted voltage value, engine ECU controls the cooling fan by operating it high speed or low speed.

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