Hyundai Elantra: Rear Glass Defogger / Rear Glass Defogger Switch

Hyundai Elantra (CN7) 2021-2025 Service Manual / Body Electrical System / Rear Glass Defogger / Rear Glass Defogger Switch

Repair procedures

Diagnosis with Diagnostic tool

In the body electrical system, failure can be quickly diagnosed by using the vehicle diagnostic system (Diagnostic tool).

The diagnostic system (Diagnostic tool) provides the following information.

(1)	Fault Code Searching : Checking failure and code number (DTC)

(2)	Data Analysis : Checking the system input/output data state

(3)	Actuation test : Checking the system operation condition

(4)	S/W Management : Controlling other features including system option setting and zero point adjustment

2.	If diagnose the vehicle by Diagnostic tool, select "DTC Analysis" and "Vehicle".

3.	Select the 'Data Analysis' and 'Car model'.

4.	Select the 'IBU_BCM' to search the current state of the input/output data.

5.	To forcibly actuate the input value of the module to be checked, select option 'Actuation Test'.

Removal

1.	Disconnect the negative (-) battery terminal.

2.	Remove the heater and A/C controll unit. (Refer to Heating, Ventilation, Air conditioning - "Heater & A/C Control Unit (Dual)")

Installation

1.	Install the heater and A/C control unit.

2.	Connect the negative (-) battery terminal.

Rear Glass Defogger Printed Heater

Repair procedures Inspection • Wrap tin foil around the end of the voltmeter test lead to prevent damaging the heater line...

Windshield Wiper/Washer

Other information:

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Tachometer

The tachometer indicates the approximate number of engine revolutions per minute (RPM).

Use the tachometer to select the correct shift points and to prevent lugging and/ or over-revving the engine.

NOTICE

Do not operate the engine within the tachometer's RED ZONE. This may cause severe engine damage.