Hyundai Tucson Quiz
Heating, Ventilation and Air Conditioning

Auto Defogging Sensor

In this manual: Heating, Ventilation and Air Conditioning
General Information — 17Engine Mechanical System — 51Engine Electrical System — 26Emission Control System — 23Engine/Fuel Control System — 44Clutch System — 12MANUAL TRANSMISSION SYSTEM — 12AUTOMATIC TRANSMISSION SYSTEM — 42Four-Wheel Drive (4WD) System — 14Drive Shaft and Axle — 22Suspension System — 30Steering System — 16Restraint — 21Braking System — 47Body Work (Interior and Exterior) — 145Body Electrical System — 162Heating, Ventilation and Air Conditioning — 39
8steps
~48min
2/5difficulty
Done 0 of 8

Description and Operation

Description

The automatic defogging sensor is installed on the windshield. The sensor detects moisture and sends a signal to remove fogging. The air conditioning control module receives the signal, detects and removes moisture, and eliminates fogging by controlling the intake air door actuator, air conditioning, automatic blower actuator, blower motor speed and mode actuator.

Repair Procedures

Diagnosis with GDS

  1. The heating, ventilation and air conditioning (HVAC) system can be diagnosed quickly (defective parts) using the Global Diagnostic System (GDS). ※ The GDS provides the following information. (1) Self-diagnosis: checks and displays diagnostic trouble codes (DTC). (2) Current data: checks the status of input/output signals. (3) Active test: checks system operating conditions. (4) Additional functions: in addition to control, such as zero point adjustment.
  2. Select the "Vehicle Model" and the system to be checked in order to inspect the vehicle with the scan tool.
  3. Select the "Current Data" menu to check the current status of the input/output data. Input/output data for sensors related to the automatic defogging sensor can be checked.

REPLACEMENT

  1. Disconnect the negative (-) battery terminal.
  2. Remove the ECM mirror cover (A).
  3. Remove the rain sensor cover (A).
  4. Disconnect the connector (A), then remove the automatic sensor connection (B).
  5. To install, perform the removal procedure in reverse order.

Test yourself

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