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

Hyundai Elantra AD (2016-2020) Service Manual / Body Electrical System / Fuses And Relays / Relay Box (Passenger Compartment) Repair procedures

Fuse Inspection
1.
Be sure there is no play in the fuse holders, and that the fuses are held securely.
2.
Are the fuse capacities for each circuit correct?
3.
Are there any blown fuses?
   
If a fuse is to be replaced, be sure to use a new fuse of the same capacity. Always determine why the fuse blew first and completely eliminate the problem before installing a new fuse.
Diagnosis with GDS
1.
The body electrocal system can be quickly diagnosed failed parts with vehicle diagnostic system (GDS).
The diagnostic system (GDS) provides the following information.
(1)
1) Self diagnosis : Checking the failure code (DTC) and display
(2)
2) Current data : Checking the system input/output data state
(3)
3) Actuator test : Checking the system operation condition
(4)
4) Additional function : Other controlling such as he system option and zero point adjustment
2.
Select the "Car Model" and the system to be checked in order to check the vehicle with the tester.
3.
Select the "Smart Junction Block (SJB)".
4.
Select the "Current Data" menu to search the current state of the input/output data.
The input/output data for the sensors corresponding to the Smart Junction Block (SJB) can be checked.

5.
If you will check the power door lock operation forcefully, select "Actuation Test".

6.
If you want to change user option, select "User Option".

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 (A) from the fuse side of the SJB.

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

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

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 (Passenger Compartment) Description and Operation
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