Get Driving your vehicle -> Idle Stop and Go (ISG) system Guide for Hyundai I20 4 Door Third Generation (2021-2026)

Driving your vehicle

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Your vehicle may be equipped with

Deactivating the ISG

the ISG system, which reduces fuel

consumption by stopping and restarting

the engine automatically.

The engine starts automatically as soon

as the starting conditions are met.

NOTICE

When the engine automatically starts

by the ISG system, some warning lights

(ABS, ESC, ESC OFF, EPS or Parking

brake warning light) may turn on for a

few seconds. This happens because of

OBC3N061014AU

If you want to deactivate the ISG system,

press the ISG OFF button.

The light on the ISG OFF button will

illuminate.

If you press the ISG OFF button again,

the system will be activated and the light

on the ISG OFF button will turn off.

low battery voltage. It does not mean

the system is malfunctioning.

Activating the ISG

Prerequisite for activation

The ISG system operates in the following

situations.

śꢀ The driver’s seatbelt is fastened

śꢀ The driver’s door and bonnet are

closed

śꢀ The brake vacuum pressure is

adequate

śꢀ The battery sensor is activated and the

battery is sufficiently charged

śꢀ Outside temperature is not too low or

too high

śꢀ The vehicle is driven over a constant

speed and stops

śꢀ The climate control system satisfies

the conditions

śꢀ The vehicle is sufficiently warmed up

śꢀ The incline is gradual

śꢀ The steering wheel is turned less than

180 degrees and then the vehicle

stops

6-46

06

Auto stop

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Manual Transmission/Intelligent

Manual Transmission

Three versions of idle stop are available

for MHEV which is equipped with

manual transmission or intelligent

manual transmission.

- Conventional Idle STOP

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than 4 mph (7 km/h).

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- Extended Idle STOP

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- During Sailing Mode

You can keep engine off status from

sailing to standstill by pressing clutch

and brake pedal nearly at the same time.

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Manual Transmission/Intelligent

Manual Transmission

1. Decrease the vehicle speed to less

than 3 mph (5 km/h).

2. Shift into N (Neutral) position.

3. Release the clutch pedal.

Automatic Transmission/Dual Clutch

Transmission

1. Decrease the vehicle speed to 0 mph

(0 km/h).

NOTICE

1. If last gear position was the 1st, ISG

STOP will not be activated.

2. Vehicle which is equipped with

manual transmission or intelligent

manual transmission must reach

a speed of at least 5 mph (8 km/h)

since last idle stop.

2. Press the brake pedal.

The engine will stop and the green AUTO

STOP indicator (

) on the instrument

cluster will illuminate.

3. During ISG STOP status, you can shift

into N(Neutral) position and release

clutch pedal, then ISG STOP status

will remain as STOP.

4. Extended Idle STOP operates even

over 4 mph (7km/h) if it meets the

speed requirement in each gear

position. (example: Extended Idle

STOP operates even at the 3rd speed,

24 mph (40km/h)).

NOTICE

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manual transmission or intelligent

manual transmission must reach

a speed of at least 5 mph (8 km/h)

since last idle stop and vehicle

which is equipped with automatic

transmission or dual clutch

transmission must reach a speed of

at least 3 mph (5 km/h) since last idle

stop.

5. If you unfasten the seat belt or open

the driver’s door (engine bonnet), ISG

system will be deactivated.

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the driver’s door (engine bonnet), ISG

system will be deactivated.

6-47

Driving your vehicle

Automatic Transmission/Dual Clutch

Transmission

- Conventional Idle STOP

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(0 km/h).

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Auto start

To restart the engine from idle stop

mode (except 48V MHEV)

Manual transmission vehicle/ Intelligent

Manual Transmission

Vehicle which is equipped with manual

transmission or intelligent manual

transmission is available two version of

restart.

- Conventional restart

Press the clutch pedal when the shift

lever is in the N (Neutral) position.

- Extended Idle STOP

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15 mph (25 km/h).

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- During Sailing Mode

You can keep engine off status from

sailing to standstill by pressing brake

pedal below 24 mph (40 km/h).

- Late restart (if equipped)

1. Depress the clutch pedal

2. Engage the gear

NOTICE

Vehicle which is equipped automatic

3. Release the brake pedal

transmission or dual clutch

transmission must reach a speed of at

least 18 mph (30 km/h) for Extended

Idle STOP or 3 mph (5 km/h) for

Conventional Idle STOP since last idle

stop.

- If you unfasten the seat belt or open

the driver’s door (engine bonnet)

in auto stop mode at standstill, ISG

system will be deactivated.

NOTICE

1. Late restart function is only operated

when it is on a level ground and the

vehicle is stable.

2. To start the engine when the brake

pedal is not pressed or gear is already

engaged, press the brake pedal first

and press on the clutch pedal for

safety.

3. To turn on the engine without vehicle

movement with the brake pedal

pressed (only with Late Restart),

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immediately

4. After the engine stall, If you operate

as below the engine will start.

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engine completely stop

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6-48

06

Automatic Transmission/Dual Clutch

Transmission

- Release the brake pedal.

NOTICE

1. Late restart function is only operated

when it is on a level ground and the

vehicle is stable.

2. To start the engine when the brake

pedal is not pressed or gear is already

engaged, press the brake pedal first

and press on the clutch pedal for

safety.

The engine will start and the green AUTO

STOP indicator (

cluster will go out.

) on the instrument

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Manual Transmission/Intelligent

Manual Transmission

- Before standstill

Press the clutch pedal if the clutch pedal

has not pressed.

If the clutch pedal has already been

pressed, release the brake pedal or

move the gear to a position other than N

position.

3. To turn on the engine without vehicle

movement with the brake pedal

pressed (only with Late Restart),

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immediately

4. After the engine stall, if you operate

as below the engine will start.

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engine completely stops

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- After standstill

5. After operating ISG STOP, if the

vehicle speed increases instead of

decreasing, the engine may restart

automatically.

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pressed, release the brake pedal or

move the gear from N (Neutral).

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engine will restart in accordance with

the LATE Restart procedure.

Automatic Transmission/Dual Clutch

Transmission

Release the brake pedal

1) Depress the clutch pedal

2) Engage the gear

3) Release only the brake pedal

NOTICE

After operating ISG STOP, if the vehicle

speed increases instead of decreasing,

the engine may restart automatically.

6-49

Driving your vehicle

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śꢀ The brake vacuum pressure is low.

śꢀ You have exceeded the maximum

engine off time

śꢀ The air conditioning is ON with the fan

speed set to the highest position.

śꢀ Fogging of the windows could occur

and the air conditioning is on.

śꢀ The battery is not within optimal

operating conditions.

śꢀ The cooling and heating performance

of the climate control system is

unsatisfactory.

śꢀ When you press the ISG OFF button

with the engine automatically stopped

(except Manual Transmission)

Condition of ISG system

operation

The ISG system will operate under the

following condition:

śꢀ The driver’s seatbelt is fastened

śꢀ The driver’s door and bonnet are

closed

śꢀ The brake vacuum pressure is

adequate

śꢀ The battery sensor is activated and the

battery is sufficiently charged

śꢀ Outside temperature is not too low or

too high

śꢀ The vehicle is driven over a constant

speed and stops

śꢀ The climate control system satisfies

the conditions

śꢀ The vehicle is sufficiently warmed up

śꢀ The vehicle is not on a steep road

grade (Except Manual Transmission)

śꢀ The steering wheel is not at a sharp

angle

śꢀ The vehicle is not at a high elevation

śꢀ The front windscreen defroster is off

śꢀ You have not selected Manual shift

mode (Except Manual Transmission)

śꢀ When sufficient time has elapsed after

shifting to R (Reverse) was released

śꢀ Your vehicle is moving after standstill.

śꢀ You press the accelerator and the

brake pedal at the same time. (Except

Manual Transmission)

śꢀ The driver safety belt becomes

unfastened or the driver door is

ajar (Except Manual Transmission)

conditions.

The green AUTO STOP indicator (

)

on the instrument cluster will blink for 5

seconds.

NOTICE

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operation condition, the ISG system

is deactivated.

6-50

06

ISG Indication

The ISG System is indicated by lamp on

the instrument cluster. If your vehicle is

equipped with a supervision cluster, the

notice will illuminate on the LCD display.

OBC3N061014AU

OBC3060009

The system may require the engine to

manually restart when the light on the

ISG OFF button will illuminate and if your

vehicle is equipped with a supervision

cluster, a warning message comes on

continuously.

OBC3070110TU/OBC3070111TU

The engine will not start if the shift lever

is moved from the N (neutral) stage to

the D (driving) stage, manual mode, or R

(reverse) stage without stepping on the

brake pedal whilst the engine is stopped

automatically. At this time, if you press

the brake it will be restarted.

6-51

Driving your vehicle

Conventional MT vehicle (not MHEV or

not equipped with LATE Restart) is able

to restart engine, only in Neutral gear.

If you select a gear, without depressing

clutch pedal fully, then warning will be

displayed with beep. You should restart

the engine in Neutral gear position.

ISG malfunction

The system may not operate when:

Unintentionally, when the engine is

turned off or the vehicle is moving, if the

gear is engaged and the clutch pedal

is not pressed, the system displays the

warning message as shown below. At

this time, if the driver presses the clutch

pedal all the way, the engine restarts

automatically. (Only with Late Restart

equipped ISG system, except MHEV)

OBC3060009

The ISG related sensors or system error

occurs.

The yellow AUTO STOP indicator

(

) on the instrument cluster will

stay on after blinking for 5 seconds and

the light on the ISG OFF button will

illuminate.

NOTICE

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turned off by pressing the ISG OFF

button again or if the ISG system

continuously does not work correctly,

have your vehicle inspected by a

professional workshop as soon as

possible. Hyundai recommends

to contact a HYUNDAI authorised

repairer.

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on, it may stop illuminating after

driving your vehicle at approximately

50 mph (80 km/h) for a maximum

of two hours and setting the fan

speed control knob below the 2nd

position. If the ISG OFF button light

continues to be illuminated in spite

of the procedure, have your vehicle

inspected by a professional workshop

as soon as possible. Hyundai

recommends to contact a HYUNDAI

authorised repairer.

6-52

06

NOTICE

If you want to use the ISG function, the

battery sensor needs to be calibrated

for approximately 4 hours with the

ignition off and then, turn the engine

on and off 2 or 3 times.

WARNING

When the engine is in Idle Stop mode,

it’s possible to restart the engine

without the driver taking any action.

Before leaving the car or doing

anything in the engine room area,

stop the engine by turning the ignition

switch to the LOCK (OFF) position or

removing the ignition key.

6-53

Driving your vehicle -> Idle Stop and Go (ISG) system for Your Hyundai I20 4 Door Third Generation (2021-2026)

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