2021 HYUNDAI I20 alternator

5-12
Instrument cluster
Charging System
Warning Light
This warning light illuminates:
• Once you set the ignition switch or
Engine Start/Stop button to the ON
position.
- It remains on until the engine is
started.
• When there is a malfunction with
either the alternator or electrical
charging system.
If there is a malfunction with either
the alternator or electrical charging
system:
1. Drive carefully to the nearest safe
location and stop your vehicle.
2. Turn the engine off and check the
alternator drive belt for looseness or
breakage.
If the belt is adjusted properly, there
may be a problem in the electrical
charging system.
In this case, we recommend that you
have the vehicle inspected by an
authorized HYUNDAI dealer as soon as
possible.
Engine Oil Pressure
Warning Light
This warning light illuminates:
• Once you set the ignition switch or
Engine Start/Stop button to the ON
position.
- It remains on until the engine is
started.
• When the engine oil pressure is low.
If the engine oil pressure is low:
1. Drive carefully to the nearest safe
location and stop your vehicle.
2. Turn the engine off and check the
engine oil level (For more details, refer
to “Engine Oil” in chapter 9). If the
level is low, add oil as required.
If the warning light remains on after
adding oil or if oil is not available, we
recommend that you have the vehicle
inspected by an authorized HYUNDAI
dealer as soon as possible.

10-34
Maintenance
Recommended engine coolant
• Use only soft (distilled) water in the
coolant mixture.
• The engine in your vehicle has
aluminum engine parts and must be
protected by an ethylene-glycol-based
coolant to prevent corrosion and
freezing.
• DO NOT USE alcohol or methanol
coolant or mix them with the specified
coolant.
• Do not use a solution that contains
more than 60% antifreeze or less than
35% antifreeze, which would reduce
the effectiveness of the solution.
For mixture percentage, refer to the
following table.
Ambient
TemperatureMixture Percentage
(volume)
Antifreeze Water
-15°C (5°F)35 65
-25°C (-13°F)40 60
-35°C (-31°F) 50 50
-45°C (-49°F) 60 40

WARNING
Radiator cap
Do not remove the radiator
cap when the engine and
radiator are hot. Scalding
hot coolant and steam
may blow out under pressure causing
serious injury.
Changing the coolant
We recommend that the coolant be
replaced by an authorized HYUNDAI
dealer.
NOTICE
Put a thick cloth or fabric around the
radiator cap before refilling the coolant
in order to prevent the coolant from
overflowing into engine parts such as
the alternator.
WARNING
Coolant
• Do not use radiator coolant or
antifreeze in the washer fluid
reservoir.
• Radiator coolant can severely
obscure visibility when sprayed on
the windshield and may cause loss
of vehicle control or damage to paint
and body trim.

10-71
10
Engine Compartment Fuse Panel (1.0 T-GDi)
Fuse Name SymbolFuse
RatingCircuit Protected
ALT150A Alternator, Multi Fuse - F3, Fuse - F32/F33/F34/F35
MDPS
80A MDPS Unit
DCT1
40A TCU
E-CLUTCH1
40A Electronic Clutch Module
DCT2
40A TCU
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.6)
ECU3
15A ECU
ECU2
15A ECU
A/CON 1
10A E/R Junction Block (RLY.3)
DCT4
40A Smart Gear Actuator
BATT4
40AICU Junction Block
(Power Window Relay, Fuse - F3/F10/F11)
BATT1
50A ICU Junction Block (IPS1, IPS3, IPS5, IPS7, IPS8, IPS11)
BATT3
40AICU Junction Block (Fuse - F8/F21/F25/F29,
Long Term Load Latch Relay)
DCT3
15A TCU
E-CLUTCH2
15A Electronic Clutch Module
HORN
15A E/R Junction Block (RLY.11, RLY.12)

10-73
10
Engine Compartment Fuse Panel (Smartstream G1.2)
Fuse Name SymbolFuse
RatingCircuit Protected
ALT125A Alternator, Multi Fuse - F3, Fuse - F32/F33/F34/F35
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.6)
ECU3
15A ECU/PCU
ECU2
15A ECU/PCU
A/CON 1
10A E/R Junction Block (RLY.3)
BATT4
40AICU Junction Block
(Power Window Relay, Fuse - F3/F10/F11)
BATT1
50A ICU Junction Block (IPS1, IPS3, IPS5, IPS7, IPS8, IPS11)
BATT3
40AICU Junction Block (Fuse - F8/F21/F25/F29,
Long Term Load Latch Relay)
HORN
15A E/R Junction Block (RLY.11, RLY.12)
BATT2
50A ICU Junction Block (IPS2, IPS4, IPS6, IPS9, IPS10)
IG2
40AE/R Junction Block (RLY.9).
[With Smart Key] PDM Relay Box (IG2 Relay)
[W/O Smart Key] Ignition Switch
C/FAN
40A E/R Junction Block (RLY.2)
IGN COIL
20A Ignition Coil #1/#2/#3/#4

10-75
10
Engine Compartment Fuse Panel (1.5 WGT)
Fuse Name SymbolFuse
RatingCircuit Protected
GLOW100A Glow Relay Unit
ALT
180A Alternator, Multi Fuse - F3, Fuse - F32/F33/F34/F35
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.6)
ECU2
15A ECU
A/CON 1
10A E/R Junction Block (RLY.3)
FUEL HEATER
30A E/R Junction Block (RLY.14)
BATT4
40AICU Junction Block
(Power Window Relay, Fuse - F3/F10/F11)
BATT1
50A ICU Junction Block (IPS1, IPS3, IPS5, IPS7, IPS8, IPS11)
BATT3
40AICU Junction Block (Fuse - F8/F21/F25/F29,
Long Term Load Latch Relay)
HORN
15A E/R Junction Block (RLY.11, RLY.12)
AMS
10A Battery Sensor
BATT2
50A ICU Junction Block (IPS2, IPS4, IPS6, IPS9, IPS10)
IG2
40AE/R Junction Block (RLY.9).
[With Smart Key] PDM Relay Box (IG2 Relay)
[W/O Smart Key] Ignition Switch