Hyundai Tucson Owners & Service Manuals

Hyundai Tucson: Idle Stop and Go (ISG) System / ISG System Operation

Prerequisite for activation

  • The driver's seatbelt is fastened.
  • The driver's door and hood are closed.
  • The brake vacuum pressure is adequate.
  • The battery sensor is activated and the battery is sufficiently charged.
  • Outside temperature is not too low or too high.
  • The vehicle is driven over a constant speed and stops.
  • The climate control system satisfies the conditions.
  • The vehicle is sufficiently warmed up.
  • ISG related parts are working properly.
  • The incline is gradual.
  • The steering wheel is turned less than 180 degrees before the vehicle stops.

Information

If the Auto Stop () indicator is white on the instrument cluster, the ISG system does not meet the prerequisites above and is not active. If the Auto Stop () indicator is yellow, have the system inspected by an authorized HYUNDAI dealer.

Auto stop

When ISG is on, the engine stops automatically when both of the following occur:

1. Vehicle speed decreases to 0 mph (0 km/h) (full stop condition).

2. Brake pedal is depressed and gear is in D (Drive) or N (Neutral).

The Auto Stop () indicator illuminates in green on the instrument cluster, when the engine stops.

Information

Idle stop cannot occur again until the vehicle speed goes above 3 mph (5 km/h) and then comes to a full stop again.

In Auto Stop mode, if the hood is opened, ISG system is deactivated.

When the system is deactivated, the ISG OFF button indicator illuminates and the message, "Auto Stop is off. Shift to P or N and start engine manually" appears on the cluster display with a warning sound.

If this occurs, depress the brake pedal and restart the engine manually.

Auto start

When ISG stops the engine automatically, the engine restarts if:

- The brake pedal is released. - You take your foot off the brake pedal and then depress the accelerator pedal when Auto Hold is activated. - You shift the gear from N (Neutral) or D (Drive) to R (Reverse) or P (Park) while depressing the brake pedal. - You shift the gear from N (Neutral) to D (Drive) while depressing the brake pedal.

The Auto Stop () indicator goes to white on the instrument cluster, when the engine is restarted.

Cluster display messages

Auto Stop is Off. Shift to P or N and start engine manually

When the system is deactivated, the ISG off button indicator illuminates and a message appears on the cluster display with a warning sound if:

- The hood is opened.
- ISG system is not working normally.

If this occurs, depress the brake pedal and restart the engine manually. For your safety, restart the vehicle in the P (Park) position.

Press brake pedal for Auto Start

When the gear is shifted from N (Neutral) to R (Reverse), D (Drive), or Manual shift mode without the brake pedal depressed, a message appears on the cluster display. To activate auto start, depress the brake pedal.

AUTO STOP elapsed time

AUTO STOP display shows the elapsed time of engine stop by the Idle Stop and Go system.

You may check AUTO STOP elapsed time in the Trip Computer mode on the instrument cluster.

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