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Hyundai Tucson: Operation for each function of button starting

Hyundai Tucson - Fourth generation (NX4) - (2020-2023) - Workshop Manual / Body Electrical System / Button Engine Start System / Operation for each function of button starting

Electric power ON / Ignition ON

The electric power state changes within the range of OFF ->ACC->IGN->OFF by pressing the button without stepping on the brake (Or with stepping on the brake) inside the car with FOB key (However. When the gear is not in P. the power repeatedly changes between ACC and IGN. Converting to OFF is impossible.)
The ignition is on when the button is pressed with stepping on the brake at P/N position with FOB key.

Electric power OFF/ Ignition OFF

The ignition OFF is possible in the state of vehicle stop. (The ignition OFF state is possible regardless of the ATM lever position.)
The lever shall be shifted for parking in gear N by pressing the ATM lever release button after electric power off in P.

How to off the ignition forcibly and to restart during driving

I t is a method of forcibly turning off ignition in case of fuel leakage when the vehicle is overturned or of emergency (e.g.

failure in accelerator pedal return)
The engine is off and returned to the ACC state when the button is pressed for 2 seconds and more than 3 times successively within 3 seconds during driving. The restarting is available for next 30 seconds regardless of FOB key and the electric power is changed through OFF -> ACC->IGN-"OFF by pressing the button without stepping on the brake (or with stepping on the brake) inside the car with FOB key. (However, when it is not in P position. ACC<->IGN is repeated. The conversion to OFF is impossible.)

State of start button indicator (LED) ON depending on the electric power state.

Electric power OFF : LED OFF
Electric power ACC state : Yellow LED ON
Electric power ON : Blue LED ON
During cranking : Maintaining the previous LED ON state before cranking
Starting ON state : LED OFF

System Main Function

Switching of ACC / IGN1 / IGN2 terminals.
Control of the STARTER relay BAT line (high side) based on communication with EMS ECU.
Management of the Immobilizer function.
Management of BES warning function.

IBU (Integrated Body Control Unit (IBU)

The IBU manages all function related to : -"Start Stop Button (SSB) monitoring", "Immobilizer communication" (with Engine Management System unit for immobilizer release) Authentication server" (Validity of Tran

Start/Stop Button (SSB)

A single stage push button is used for the driver to operate the vehicle. Pressing this button allows: To activate the power modes ' O f f . 'Accessory', 'Ignition' and 'Start' by switching the corresponding t

Wireless Power Charger System

Description and Operation Wireless Power Charger System During ACC or IG ON, battery voltage is supplied to the wireless power charger system to transmit an output of 5 W to mobile phone. Mobile phones certified with the wireless charging st

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Exterior care

Exterior general caution It is very important to follow the label directions when using any chemical cleaner or polish. Read all warning and caution statements that appear on the label. Finish maintenance Washing To help protect your vehicle'

Windshield Wiper Washer - Installation

Check the operation of the rain sensor and the light sensor before mounting. Check the sensor for silicon damage. Check w7hether the rain sensor connector is tightened. Check w7hether the rain sensor and bracket are properly tightened.