Fuses and Relay: 2021 Hyundai Sonata Fuse Diagrams Guide

Fuses and Relay: 2021 Hyundai Sonata Fuse Diagrams Guide

As safety precautions, fuses stop the flow of electricity when a circuit has too much current flowing through it. More significantly, this lowers the possibility of electrical fires while preventing damage to delicate electronic components. Knowing where fuses are located and how they work will enable you to solve simple electrical issues on your own as a Sonata owner. The owner’s manual for the Hyundai Sonata gives you a general idea of the locations and purposes of the fuses, but this guide will help you find the correct fuse for each part with the help of a comprehensive fuse diagram. You will receive comprehensive instructions on how to safely replace fuses, so you can handle small electrical problems on your own without seeking help from a professional.

2023 Hyundai Sonata Specs, Price, Features, Milage (Brochure)

Fuse

A vehicle’s electrical system is protected from electrical overload damage by fuses. This vehicle has 2 (or 3) fuse panels, one located in the driver’s side panel bolster, and the other in the engine compartment near the battery. If any of your vehicle’s lights, accessories, or controls do not work, check the appropriate circuit fuse. If a fuse has blown, the element inside the fuse will be melted or broken. If the electrical system does not work, first check the driver’s side fuse panel. Before replacing a blown fuse, turn the engine and all switches off, and then disconnect the negative battery cable. Always replace a blown fuse with one of the same rating. If the replacement fuse blows, this indicates an electrical problem. Avoid using the system involved and immediately consult an authorized HYUNDAI dealer.

NOTICE
The actual fuse/relay panel label may differ from the equipped items.

Information
Three kinds of fuses are used: blade type for lower amperage ratings, cartridge type, and fusible link for higher amperage ratings.

WARNING
NEVER replace a fuse with anything but another fuse of the same rating.

• A higher capacity fuse could cause damage and possibly cause a fire.
• Do not install a wire or aluminum foil instead of the proper fuse – even as a temporary repair. It may cause extensive wiring damage and possibly a fire.

CAUTION
Do not use a screwdriver or any other metal object to remove fuses because it may cause a short circuit and damage the system.

Instrument Panel Fuse Replacement

1. Turn the engine off.
2. Turn all other switches OFF.
3. Open the fuse panel cover.
4. Refer to the label on the inside of the fuse panel cover to locate the suspected fuse location.
   
5. Pull the suspected fuse straight out. Use the removal tool provided in the engine compartment fuse panel.
6. . Check the removed fuse; replace it if it is blown. Spare fuses are provided in the instrument panel fuse panels (or in the engine compartment fuse panel).
7. Push in a new fuse of the same rating, and make sure it fits tightly in the clips. If it fits loosely, consult an authorized HYUNDAI dealer.

In an emergency, if you do not have a spare fuse, use a fuse of the same rating from a circuit you may not need for operating the vehicle, such as the cigarette lighter fuse. If the headlamps or other electrical components do not work and the fuses are OK, check the fuse panel in the engine compartment. If a fuse is blown, it must be replaced with the same rating.

Engine Compartment Panel Fuse
Replacement

1. Turn the engine off.
2. Turn all other switches OFF.
3. Remove the fuse panel cover by pressing the tap and pulling up.
4. Check the removed fuse; replace it if it is blown. To remove or insert the fuse, use the fuse puller in the engine compartment fuse panel.
5. Push in a new fuse of the same rating, and make sure it fits tightly in the clips. If it fits loosely, consult an authorized HYUNDAI dealer.

CAUTION
After checking the fuse box in the engine compartment securely close the fuse box cover inside the engine compartment, until it clicks.
If the fuse box is not closed properly, water may leak inside, possibly causing a malfunction with the electrical system.

Multi fuse (Main fuse)

If the multi fuse is blown, it must be removed as follows:

1. Turn off the engine.
2. Disconnect the negative battery cable.
3. Remove the fuse panel cover by pressing the tab and pulling it up.
4. Remove the nuts shown in the picture above.
5. Replace the fuse with a new one of the same rating.
6. Reinstall in the reverse order of removal.

Information
If the multi fuse is blown, consult an authorized HYUNDAI dealer.

Fuse/Relay Panel Description

Instrument panel fuse panel

Inside the fuse/relay box cover, you can find the fuse/relay label describing fuse/relay names and ratings.

Information
Not all fuse panel descriptions in this manual may be applicable to your vehicle; the information is accurate at the time of printing. When you inspect the fuse box on your vehicle, refer to the fuse box label.

Instrument panel fuse panel

Fuse Name	(A)	Circuit Protected
S/HEATER (FRT)	25A	Front Seat Warmer Control Module, Front Air Ventilation Seat Control Module
TRUNK	10A	ICU Junction Block (Trunk Lid Relay)
DOOR LOCK	20A	ICU Junction Block (Door Lock Relay, Door Unlock Relay, Two Turn Unlock Relay)
MODULE1	7.5A	Key Solenoid
MODULE3	10A	Driver Door Module, Passenger Seat Relax Unit, Hazard Switch, Crash Pad Switch (Up), Front Mood Lamp Unit, Start/stop Button Switch, Driver/Passenger Smart Key Outside Handle
S/HEATER (RR)	25A	Rear Seat Warmer Control Module
P/SEAT (PASS)	30A	Passenger Seat Manual Switch, Passenger Seat Relax Unit
MODULE6	10A	Driver Door Module
SAFETY P/WINDOW (RH)	30A	Passenger Safety Power Window Module, Rear Power Window Switch RH
P/SEAT (DRV)	30A	Driver Seat Manual Switch, Driver IMS Module
IBU1	15A	IBU, Driver/Passenger Door NFC Module, IAU, BLE Unit, Ignition Switch
AMP	25A	AMP, DC-DC Converter (AMP)
SAFETY P/WINDOW (LH)	30A	Driver Safety Power Window Module, Rear Power Window Switch LH
BRAKE SWITCH	10A	IBU, Stop Lamp Switch
SUNROOF2	20A	Panorama Sunroof, Data Link Connector
AIR BAG2	10A	SRS Control Module
AIR BAG1	15A	SRS Control Module, Passenger Occupant Detection Sensor
E-SHIFTER1	10A	SCU, Electronic ATM Shift Lever
MEMORY	10A	Driver IMS Module, Security Indicator, A/C Switch, Driver/Passenger Power Outside Mirror, A/C Control Module, Instrument Cluster, Rain Sensor, Head-Up Display

Driver’s side fuse panel

Fuse Name	(A)	Circuit Protected
MULTIMEDIA	15A	Audio, A/V & Navigation Head Unit, DC-DC Converter (AMP/Audio)
SUNROOF1	20A	Panorama Sunroof
MODULE7	10A	Front Console Switch, Lane Keeping Assist Unit, IBU, Crash Pad Switch (Up/Down), Parking Collision Avoidance Assist Unit, Remote Control Smart Parking Assist Unit
MODULE5	10A	Stop Lamp Switch
MODULE8	10A	Front Seat Warmer Control Module, Front Air Ventilation Seat Control Module, Passenger Seat Relax Unit, AMP, Rear Seat Warmer Control Module, Driver IMS Module, Audio, A/V & Navigation Head Unit
E-SHIFTER2	10A	SCU, Electronic ATM Shift Lever
MODULE2	10A	IAU, Parking Collision Avoidance Assist Unit, Cooling Fan Motor, Passenger Seat Relax Unit, Rear Seat Warmer Control Module
MDPS	7.5A	MDPS Unit
A/C	7.5A	A/C Control Module, A/C Switch, E/R Junction Block (Blower Relay, PTC Heater Relay)
MODULE4	10A	Front USB Charger, Rear USB Charger, AMP, IBU, IAU, Parking Collision Avoidance Assist Unit, Audio, DC-DC Converter (AMP/Audio), A/V & Navigation, Head Unit, Surround View Monitor Unit
MODULE9	7.5A	IBU
CLUSTER	10A	Instrument Cluster, Head-Up Display
WASHER	15A	Multifunction Switch
START	7.5A	PCM/ECM, E/R Junction Block (Start Relay), ICU Junction Block (B/Alarm Relay)
POWER OUTLET	20A	Front Power Outlet
IBU2	7.5A	IBU
A/BAG IND	7.5A	Instrument Cluster, Overhead Console Lamp (Lamp)

Engine compartment fuse panel

Inside the fuse/relay box cover, you can find the fuse/relay label describing fuse/relay names and ratings.

Information
Not all fuse panel descriptions in this manual may be applicable to your vehicle; the information is accurate at the time of printing. When you inspect the fuse box on your vehicle, refer to the fuse box label. Engine compartment fuse panel

Fuse Name		(A)	Circuit Protected
MULTI FUSE-1	IG2	30A	E/R Junction Block (Start Relay), PCB Block (IG2 Relay)
	BLOWER	40A	E/R Junction Block (Blower Relay)
	ABS1	40A	ESC Module
	B+2	50A	ICU Junction Block (IPS4, IPS3, IPS1, Fuse – AMP, IBU1)
	PTC HEATER	50A	E/R Junction Block (PTC Heater Relay)
	B+3	50A	ICU Junction Block (IPS5, IPS7, IPS9, IPS10, IPS8, IPS6)
	OIL PUMP1	50A	Electronic Oil Pump
	COOLING FAN	80A	Cooling Fan Motor
	MDPS	80A	MDPS Unit
MULTI FUSE-2	E-SHIFTER	30A	SCU
	E-CVVT1	40A	[G4FN] CVVD ACTUATOR [====] E/R Junction Block (E-CVVT Relay)
	IG1	40A	PCB Block (IG1 Relay, ACC Relay)
	REAR HEATED	50A	E/R Junction Block (Rear Heated Relay)
	EPB	60A	ESC Module
	B+5	60A	PCB Block (Engine Control Relay, Fuse – A/C1, WIPER1, TCU1, HORN, ECU2)
	B+1	60A	ICU Junction Block (Fuse – P/SEAT (DRV), P/SEAT (PASS), MODULE1, SAFETY P/WINDOW (LH), SAFETY P/WINDOW (RH), S/HEATER (RR))

Fuse Name		(A)	Circuit Protected
FUSE	HEATED MIRROR	10A	Driver/Passenger Power Outside Mirror, A/C Switch, A/C Control Module, ECM
	ECU5	10A	[G4FN] ECM
	AMS	10A	Battery Sensor
	FUEL PUMP 1	20A	E/R Junction Block (Fuel Pump Relay)
	A/C 2	10A	A/C Control Module
	B+4	60A	ICU Junction Block (Long Term Load Latch Relay, Fuse – MODULE3, AIR BAG2, E-SHIFTER1, SUNROOF1, SUNROOF2, S/HEATER (FRT), TRUNK, BRAKE SWITCH, DOOR LOCK)

 

FAQs

Useful Links

View Full PDF: Hyundai Sonata 2021 User Manual| Auto User Guide

2023 Hyundai Sonata Specs, Price, Features, Milage (Brochure)

Dashboard Instructions: 2021 Hyundai Sonata Instrument Cluster Guide