Hyundai Santa Fe (TM): Body Electrical System / Rear Glass Defogger

Hyundai Santa Fe (TM) 2019-2023 Service and Repair Manual / Body Electrical System / Rear Glass Defogger

Components and components location

Component Location

1. Rear glass defogger relay (Buil-in engine room relay box)
2. Rear glass defogger switch (Dual type)

3. Rear glass defogger switch (Manual type)
4. Rear glass defogger

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. Apply finger pressure on the tin foil, moving the tin foil along the grid line to check for open circuits.

1.	Turn on the defogger switch and use a voltmeter to measure the voltage of each heater line at the glass center point. If a voltage of approximately 6V is indicated by the voltmeter, the heater line of the rear window is considered satisfactory.

2.	If a heater line is burned out between the center point and (+) terminal, the voltmeter will indicate 12V.

3.	If a heater line is burned out between the center point and (-) terminal, the voltmeter will indicate 0V.

4.	To check for open circuits, slowly move the test lead in the direction that the open circuit seems to exist. Try to find a point where a voltage is generated or changes to 0V. The point where the voltage has changed is the open-circuit point.

Use an ohmmeter to measure the resistance of each heater line between a terminal and the center of a grid line, and between the same terminal and the center of one adjacent heater line. The section with a broken heater line will have a resistance twice that in other sections. In the affected section, move the test lead to a position where the resistance sharply changes.

Repair Of Broken Heater Line

Prepare the following items :

1.	Conductive paint.

2.	Paint thinner.

3.	Masking tape.

4.	Silicone remover.

Using a thin brush :

Wipe the glass adjacent to the broken heater line, clean with silicone remover and attach the masking tape as shown. Shake the conductive paint container well, and apply three coats with a brush at intervals of about 15 minutes apart. Remove the tape and allow sufficient time for drying before applying power. For a better finish, scrape away excess deposits with a knife after the paint has completely dried. (Allow 24 hours).

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 audio unit or the AVN head unit. (Refer to Audio - "Audio Unit") (Refer to AVN system - "AVN Head Unit")

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

Installation

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

2.	Install the audio unit or the AVN head unit.

3.	Connect the negative (-) battery terminal.

❮Power Windows

Description and operation Function Of Safety Power Window When driver door power window auto-up switch is operated, safety function is activated.

Power Tailgate Module❯

Description and operation Description Power tailgate is an electro-mechanical system designed to provide power opening and closing of the tailgate through the push of a button of a remote key (fob), console switch, inner switch or an outside handle switch of the tailgate.

Other information:

Hyundai Santa Fe (TM) 2019-2023 Service and Repair Manual: AVN System

Description and operation Description AVN system The AVN system has improved information search and easiness of manipulation for the driver by simplifying the system operation experience and unifying the display of the user information such as multimedia and car information.

Hyundai Santa Fe (TM) 2019-2023 Service and Repair Manual: Emergency Call System

Description and operation Description Emergency Call (eCall) When an accident occurs or the user's request is detected, it notifies the call center of the vehicle status using the wireless network so that the center can provide necessary emergency service.