2021 HYUNDAI TUCSON ECU

7-26
Maintenance
4. Replace the air cleaner filter. 5. Pull up the lever (1) to the LOCK position.
6. Rise up the cover (2) until the hooks on the cover are securely
fastened into the latches (3).
7. Check if the cover is firmly installed.
Information
If the vehicle is operated in extremely
dusty or sandy areas, replace the air
cleaner filter more often than the
usual recommended intervals (refer to
"Maintenance Under Severe Usage
Conditions" in this chapter).
Do not drive with the air cleanerfilter removed. This will result in
excessive engine wear.
When removing the air cleaner filter, be careful that dust or dirt
does not enter the air intake, or
damage may result.
Use HYUNDAI genuine parts, use of non-genuine parts could
damage the air flow sensor.
NOTICE
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OTL075017OTL075018

7-34
Maintenance
When you do not use the vehicle for a long time in a low tempera-
ture area, disconnect the battery
and keep it indoors.
Always charge the battery fully to prevent battery case damage
in low temperature areas.
For Best Battery Service
Keep the battery securely mount-ed.
Keep the battery top clean and dry.
Keep the terminals and connec- tions clean, tight, and coated with
petroleum jelly or terminal grease.
Rinse any spilled acid from the bat- tery immediately with a solution of
water and baking soda.
Battery Recharging
NOTICE
CALIFORNIA PROPOSITION 65
WARNING
Battery posts, terminals, and
related accessories contain
lead and lead compounds,
chemicals known to the State of
California to cause cancer, birth
defects and reproductive harm.
Batteries also contain other
chemicals known to the State of
California to cause cancer.
Wash hands after handling.
WARNING
Always follow these instruc-
tions when recharging your
vehicle's battery to avoid the
risk of SERIOUS INJURY or
DEATH from explosions or acid
burns:
Before performing mainte-
nance or recharging the bat-
tery, turn off all accessories
and place the ignition switch
to the LOCK/OFF position.
Keep all flames, sparks, or
smoking materials away from
the battery.
Always work outdoors or in an
area with plenty of ventilation.
Wear eye protection when
checking the battery during
charging.
The battery must be removed
from the vehicle and placed in
a well ventilated area.
WARNING
OTL075022

7-54
Maintenance
Main fuse
If the main fuse is blown, it must be
removed as follows:
1. Turn off the engine.
2. Disconnect the negative batterycable.
3. Remove the fuse panel cover by pressing the tab and pulling it up.
4. Remove the nuts shown in the pic- ture above.
5. Replace the fuse with a new one of the same rating.
6. Reinstall in the reverse order of removal.
Information
If the main fuse is blown, consult an
authorized HYUNDAI dealer.
i
After checking the fuse box in
the engine compartment
securely close the fuse box
cover inside the engine com-
partment, until it clicks.
If the fuse box is not closed
properly, water may leak in side,
possibly causing a malfunction
with the electrical system.
CAUTION
OTLA075027

7
Maintenance
Instrument panel fuse panel
Fuse Name Fuse ratingCircuit Protected
A/CON1 7.5AA/C Control Module, Cluster Ionizer (Auto A/C), E/R Junction Block (Blower Relay)
WIPER RR 15AICM Relay Box (Rear Wiper Relay), Rear Wiper Motor
MODULE6 10ABCM, Smart Key Control Module
WASHER 15AMultifunction Switch (Washer Switch)
MODULE5 7.5ACrash Pad Switch, Parking Distance Warning Buzzer, BCM, ATM Shift Lever, 4WD ECM,
Console Switch, Blind-Spot Collision Warning Unit LH/RH, Lane Keeping Assist Unit,
Forward Collision Avoidance Assist Unit
AIR BAG 15ASRS Control Module, Passenger Occupant Detection Sensor
MODULE1 10ABCM, Smart Key Control Module, Audio, A/V & Navigation Head Unit, AMP, Power Outside Mirror
Switch, PCB Block (Power Outlet Relay), Wireless Charger, Surround View Monitor, Rear USB Charger
START 10AICM Relay Box (Burglar Alarm Relay), Transaxle Range Switch
MODULE7 7.5AFront Air Ventilation Seat Control Module, Front Seat Warmer Control Module, Rear Seat Warmer,
Surround View Monitor
HEATED STEERING 15ABCM
MODULE8 7.5ACenter Facia Switch, Key Solenoid, Forward Collision Avoidance Assist Unit, Data Link Connector
MODULE4 7.5AMultipurpose Check Connector, A/C Control Module, Audio, A/V & Navigation Head Unit,
Electro Chromic Mirror, Front Air Ventilation Seat Control Module, ATM Shift Lever ILL.,
Front Seat Warmer Control Module, Rear Seat Warmer
A/BAG IND 7.5AInstrument Cluster, Center Facia Switch
MODULE310ABCM, ATM Shift Lever, Stop Lamp Switch
SMART KEY115ASmart Key Control Module
MODULE910ABCM, Security Indicator, Rain Sensor
4WD20A4WD ECM
7-57

7-58
Maintenance
Instrument panel fuse panel
Fuse Name Fuse ratingCircuit Protected
TAILGATE OPEN10ATail Gate Open Relay
S/HEATER RR15ARear Seat Warmer
MDPS7.5AMDPS Unit
SMART KEY37.5A Smart Key Control Module, Immobilizer Module
CLUSTER7.5A Instrument Cluster (IG1 Power)
SMART KEY210A Smart Key Control Module, Start/Stop Button Switch, Immobilizer Module
MULTIMEDIA15A Audio, A/V & Navigation Head Unit
INTERIOR LAMP10A Ignition Key Ill. & Door Warning Switch, Luggage Lamp, Glove Box Lamp, Overhead Console Lamp,
Front Vanity Lamp LH/RH, Room Lamp, Rear Personal Lamp LH/RH, Wireless Charger
DOOR LOCK20A Door Lock Relay, Door Unlock Relay, ICM Relay Box (Two Turn Unlock Relay)
SUNROOF220A Panoramic Sunroof
POWER OUTLET20A [W/O Wireless Charging] Front Power Outlet & Cigarette Lighter,
[With Wireless Charging] Cigarette Lighter
BRAKE SWITCH7.5A Smart Key Control Module, Stop Lamp Switch
MEMORY210A Instrument Cluster, A/C Control Module, Electro Chromic Mirror
P/SEAT (PASS)30A Passenger Seat Manual Switch
S/HEATER FRT20A Front Air Ventilation Seat Control Module, Front Seat Warmer Control Module
MODULE220A PCB Block (Fuse - ABS3, ECU6, TCU2)
SUNROOF120A Panoramic Sunroof
A/CON27.5A A/C Control Module
HEATED MIRROR10ADriver/Passenger Power Outside Mirror, A/C Control Module, ECM (G4FJ)
P/SEAT (DRV)30ADriver Seat Manual Switch

7-62
Maintenance
Engine compartment main fuse panel
Fuse Name Fuse ratingCircuit Protected
WIPER FRT210A BCW
E-CVVT220A [G4KJ] PCM
E-CVVT120A [G4KJ] PCM
WIPER FRT125A Ignition Switch (W/O Smart Key), PDM (IG2) Relay (With Smart Key)
TCU115A [G4FJ] TCM (7DCT), [G4KJ] PCM
A/C10A E/R Junction Block (A/C Relay)
ECU320A PCM (G4NC/G4KJ) / ECM (G4FJ)
HORN15A Horn Relay
BATTERY
MANAGEMENT10A Not Used
SENSOR210A
[G4NC] Oil Control Valve #1/#2, Camshaft Position Sensor #1/#2, Purge Control Solenoid Valve, Variable Intake Solenoid Valve, Canister Close Valve, E/R Junction Block (A/C Relay,
Cooling Fan High Relay)
[G4FJ] Oil Control Valve #1/#2, Purge Control Solenoid Valve, Canister Close Valve, RCV Control Solenoid Valve, E/R Junction Block (A/C Relay, Cooling Fan High Relay)
[G4KJ] Canister Close Valve, Variable Intake Solenoid Valve, E/R Junction Block (A/C Relay, Cooling Fan High Relay)
SENSOR115A Oxygen Sensor (Up)/(Down)
ECU220A IGNITION COIL #1/#2/#3/#4, Condenser (G4NC)
ECU515A PCM (G4NC) / ECM (G4FJ)
ECU415A PCM (G4NC/G4KJ) / ECM (G4FJ)
SENSOR310A[G4NC] PCM
[G4FJ] ECM
[G4KJ] Purge Control Solenoid Valve, Oil Control Valve

7-63
Maintenance
7
Engine compartment main fuse panel
Fuse Name Fuse ratingCircuit Protected
MODULE310A E/R Junction Block (Fuel Pump Relay)
DEICER15A E/R Junction Block (Deicer Relay)
FUEL PUMP20A E/R Junction Block (Fuel Pump Relay)
B/ALARM HORN15A E/R Junction Block (B/Alarm Horn Relay)
ABS310A ESC Module
MODULE210A Not Used
POWER
OUTLER FRT20A Front Power Outlet & Cigarette Lighter (W/O Wireless Charging),
Front Power Outlet (With Wireless Charging)
ECU610A PCM (G4NC/G4KJ) / ECM (G4FJ)
TCU215A Transaxle Range Switch, TCM (G4FJ - 7DCT)
B/UP LAMP10A TCM (G4FJ), Transaxle Range Switch, Electro Chromic Mirror, Rear Combination Lamp (IN) LH/RH
POWER
OUTLER REAR20A Rear Power Outlet
ECU130A Engine Control Relay
[G4NC] : NU 2.0 GDI
[G4KJ] : Theta 2.4 GDI

7-73
7
Maintenance
High Mounted Stop Lamp
Replacement
If the LED lamp (1) does not operate,
have the system checked by an
authorized HYUNDAI dealer.
The LED lamps cannot be replaced
as a single unit because it is an inte-
grated unit. The LED lamps has to be
replaced with the unit.
A skilled technician should check or
repair the LED lamp, for it may dam-
age related parts of the vehicle.
License Plate Light Bulb
Replacement
1. Loosen the lens retaining screwswith a screwdriver.
2. Remove the lens.
3. Remove the bulb by pulling it straight out.
4. Install a new bulb.
5. Reinstall the lens securely with the lens retaining screws.
Interior Light Bulb Replacement
Map lamp and Room lamp (LED type)
If the LED lamp does not operate,
have the vehicle checked by an
authorized HYUNDAI dealer.
OTLE078040OTLE078041
OTLE075017
OTL075044
■ Room lamp
■Map lamp