ECU HYUNDAI I20 2023 Service Manual

9-44
Maintenance
Engine compartment panel fuse
replacement
OBC3N090020
1. Turn the vehicle off.
2. Turn all other switches OFF.
3. Remove the fuse panel cover by
pressing the tab 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 does not fit tightly,
we recommend that you consult a
HYUNDAI authorised repairer.
NOTICE
After checking the fuse panel in the
engine compartment, securely
install the fuse panel cover. You may
hear a clicking sound if the cover is
securely latched. If it is not securely
latched, electrical failure may occur
from water contact.
Multi fuse (Main fuse)
OBC3N091019AU
If the multi fuse is blown, it must be
removed as follows:
1. Turn the vehicle off.
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.
If the multi fuse is blown, we
recommend that you consult with a
HYUNDAI authorised repairer.

9-51
09
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Fuse Name Symbol (A) Circuit Protected
ALT(180A)
[150A]Alternator, Multi Fuse - F2, Fuse - F31/F32/F33/F34/
F35/F36
MDPS
80A MDPS Unit
DCT1
40ATCM
E-CLUTCH1Electronic Clutch Module
DCT2
40A TCM
ECU1
30A E/R Junction Block (RLY.1)
IG1
30A[With Smart Key] PDM Relay Box (IG1, ACC Relay)
[W/O Smart Key] Ignition Switch
FUEL PUMP
20A E/R Junction Block (RLY.5)
BATTERY
MANAGEMENT1
15A E/R Junction Block (Fuse - F40/F43)
ECU3
15A ECM, Clutch Switch
ECU2
15A ECM
A/CON 1
10A E/R Junction Block (RLY.10)
DCT4
40A Smart Gear Actuator
CVVD
40A CVVD Actuator
IG2
30A[With Smart Key] PDM Relay Box (IG2 Relay)
[W/O Smart Key] Ignition Switch, START MTR RLY
BATT1
50AICU Junction Block (IPS1, IPS3, IPS5, IPS7, IPS8,
IPS11)
BATT3
50AICU Junction Block (Fuse - F8/F15/F21/F25/F29,
Long Term Load Latch Relay-F16/F9/F22)
DCT3
15A TCM
E-CLUTCH2Electronic Clutch Module
HORN
15A E/R Junction Block (RLY.11, RLY.12)
AMS
10A Battery Sensor
BATT2
50A ICU Junction Block (IPS2, IPS4, IPS6, IPS9, IPS10)
BATT4
50AICU Junction Block (Power Window Relay-F5/F12,
Fuse - F3/F4/F10/F11)
C/FAN
60A E/R Junction Block (RLY.2)

9-52
Maintenance
Fuse Name Symbol (A) Circuit Protected
IGN COIL15A Ignition Coil #1/#2/#3
ECU5
20A ECM
ECU6
15A ECM
SENSOR 1
10AE/R Junction Block (RLY.2/10),
Oil Control Valve #1/#2 (Intake/Exhaust),
Purge Control Solenoid Valve, RCV Control, V_Oil
Pump Solenoid Valve
SENSOR 2
10A Oxygen Sensor (Up/Down)
RR DEFOG
40A ICU Junction Block (Rear Defogger Relay)
ABS 1
40A ESP Control Module
BLOWER
40A E/R Junction Block (RLY.13)
PTC
HEATER
50A E/R Junction Block (RLY.14)
ABS 2
30A ESP Control Module
POWER
OUTLET
40A ICU Junction Block (Power Outlet Relay)
WIPER 2
10A E/T Junction Block (RLY. 4), Front Wiper Motor, IBU
SENSOR3
15A E/T Junction Block (RLY. 5)
MHSG
10A Mild Hybrid Starter & Generator Motor
BATTERY
C/FAN
10A BMS Cooling Fan, E/R Junction Block (Fuse - F8)
WIPER 1
25AE/T Junction Block (RLY. 4), Front Wiper Motor,
Ignition Switch
BATTERY
MANAGEMENT2
10ABMS Control Module, E/R Junction Block (Fuse -
F8)
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9-54
Maintenance
Fuse Name Symbol (A) Circuit Protected
ALT(125A)
[150A]Alternator, Multi Fuse - F2, Fuse - F31/F32/F33/F34/
F35/F36
MDPS
80A MDPS Unit
ECU1
30A E/R Junction Block (RLY.1)
IG1
30A[With Smart Key] PDM Relay Box (IG1, ACC Relay)
[W/O Smart Key] Ignition Switch
FUEL PUMP
20A E/R Junction Block (RLY.5)
ECU3
15A ECM, Clutch Switch
ECU2
15A ECM
A/CON 1
10A E/R Junction Block (RLY.8)
IG2
30A[With Smart Key] PDM Relay Box (IG2 Relay)
[W/O Smart Key] Ignition Switch, START MTR RLY
BATT1
50AICU Junction Block (IPS1, IPS3, IPS5, IPS7, IPS8,
IPS11)
BATT3
50AICU Junction Block (Fuse - F8/F15/F21/F25/F29,
Long Term Load Latch Relay-F16/F9/F22)
HORN
15A E/R Junction Block (RLY.11, RLY.12)
AMS
10A Battery Sensor
BATT2
50A ICU Junction Block (IPS2, IPS4, IPS6, IPS9, IPS10)
BATT4
50AICU Junction Block (Power Window Relay-F5/F12,
Fuse - F3/F4/F10/F11)
C/FAN
40A E/R Junction Block (RLY.9/10)
IGN COIL
20A Ignition Coil #1/#2/#3/#4
ECU5
20A ECM
ECU6
15A ECM
SENSOR 1
10AE/R Junction Block (RLY.8/9/10),
Oil Control Valve #1/#2 (Intake/Exhaust),
Purge Control Solenoid Valve
SENSOR 2
10A Oxygen Sensor (Up/Down)
RR DEFOG
40A ICU Junction Block (Rear Defogger Relay)
ABS 1
40A ESP Control Module
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9-57
09
3HWURO
Fuse Name Symbol (A) Circuit Protected
ALT(125A)
[150A]Alternator, Multi Fuse - F2, Fuse - F31/F32/F33/F34/
F35/F36
MDPS
80A MDPS Unit
ECU1
30A E/R Junction Block (RLY.1)
IG1
30A[With Smart Key] PDM Relay Box (IG1, ACC Relay)
[W/O Smart Key] Ignition Switch
FUEL PUMP
20A E/R Junction Block (RLY.5)
TCU1
15A PCM, Clutch Switch
ECU2
15A ECM/PCM
EOP
40A Electronic Oil Pump
IG2
30A[With Smart Key] PDM Relay Box (IG2 Relay)
[W/O Smart Key] Ignition Switch, START MTR RLY
BATT1
50AICU Junction Block (IPS1, IPS3, IPS5, IPS7, IPS8,
IPS11)
BATT3
50AICU Junction Block (Fuse - F8/F15/F21/F25/F29,
Long Term Load Latch Relay-F16/F9/F22)
HORN
15A E/R Junction Block (RLY.11, RLY.12)
AMS
10A Battery Sensor
BATT2
50A ICU Junction Block (IPS2, IPS4, IPS6, IPS9, IPS10)
BATT4
50AICU Junction Block (Power Window Relay-F5/F12,
Fuse - F3/F4/F10/F11)
C/FAN
40A E/R Junction Block (RLY.9/10)
IGN COIL
20A Ignition Coil #1/#2/#3/#4, Condensor
ECU5
20A ECM/PCM
ECU6
15A ECM/PCM
SENSOR 1
10AE/R Junction Block (RLY.9/10),
Oil Control Valve #1/#2 (Intake/Exhaust),
Purge Control Solenoid Valve, Variable Intake
Solenoid Valve
SENSOR 2
10A Oxygen Sensor (Up/Down)
RR DEFOG
40A ICU Junction Block (Rear Defogger Relay)