Hyundai Elantra CN7: Fuses And Relays - Body Electrical System - Hyundai Elantra CN7 2021-2024 Workshop ManualHyundai Elantra CN7: Fuses And Relays

Components and components location

Component Location
[Engine Room]

1. Engine room junction block


[Interior Relay]

1. ICU (Integrated Central Control Unit)


Relay Box (Engine Compartment)

Repair procedures
Inspection
1.
Disconnect the negative (-) battery terminal.
2.
Pull out the relay from the engine compartment relay block.
Power Relay (Type A)
Check for continuity between the terminals.
1.
After supplying power to between No. 85 and 86 power relay terminals, check that there is continuity between No. 30 and 87 terminals.
2.
After disconnecting power between No. 85 and 86 power relay terminals, check that there is no continuity between No. 30 and 87 terminals.
Engine Room Relay Block

Power Relay (Type B)
Check for continuity between the terminals.
1.
After supplying power to between No. 85 and 86 power relay terminals, check that there is continuity between No. 30 and 87 terminals.
2.
After disconnecting power between No. 85 and 86 power relay terminals, check that there is no continuity between No. 30 and 87 terminals.

PCB Block
1.
Disconnect the negative (-) battery terminal.
2.
Disconnect the PCB block connector (A).

3.
Push the four hooks (B) in the direction of the arrow and lift up the PCB block (A).

4.
Remove the PCB block by disconnet the connector.

Fuse
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.
3.
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.
Multi Fuse
Engine room fuse is to optimize the package.

   
•
The entire multi fuse (A) has to be replaced even if only one fuse is damaged.
•
When replacing it, refer to "the Engine compartment- component location" diagram to check fuse capacities and circuit arrangement.
•
Use the multi fuse of the exact fuse capacity for each circuit.

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.
3.
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
1.
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.
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