Hyundai Elantra: Fuses And Relays / Relay Box (Passenger Compartment)

Hyundai Elantra (CN7) 2021-2024 Service Manual / Body Electrical System / Fuses And Relays / Relay Box (Passenger Compartment)

Repair procedures

Fuse Inspection

1.	Check that the fuse holders are loosely held and that the fuses are securely fixed by the holders.

2.	Check that each fuse circuit has the exact fuse capacity.

Check the fuses for any damage.

•	If a fuse is to be replaced, be sure to use a new fuse of the same capacity. Always identify the cause of the blown fuse and completely eliminate the problem before installing a new fuse.

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

(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.	If check current status, select the "Data Analysis" and "Car model".

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

Removal

1.	Disconnect the negative (-) battery terminal.

2.	Remove the crash pad lower panel. (Refer to Body - "Crash Pad Lower Panel")

3.	Disconnect the connectors from the fuse side of the ICU.

4.	Remove the ICU (A) after loosening the mounting nuts.

5.	Disconnect the connectors from the back side of the ICU.

Installation

1.	Install the smart junction box.

2.	Install the crash pad lower panel.

3.	Connect the negative (-) battery terminal.

4.	Check that all system operates normally.

Relay Box (Engine Compartment)

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