Hyundai Genesis (DH): Button Engine Start System / Description and Operation

Hyundai Genesis (DH) 2013-2016 Service Manual / Body Electrical System / Button Engine Start System / Description and Operation

Description
System Overview
The System offers the following features:
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Changing the state of engine ignition and power by using the start button.
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Controlling external relays for ACC / IGN1 / IGN2 terminal switching and STARTER, without use of mechanical ignition switch.
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Indicating the vehicle status on display by using LED or explicit messages.
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Immobilizer function by LF transponder communication between fob and fob holder.
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Redundant architecture for high system dependability .
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Interface with Low Speed CAN vehicle communication network.
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Interface with LIN vehicle communication network depending on platform .
The RKE and SMART KEY functions are not considered part of this Button Engine Start system and are specified in a separate system.
System Main Function
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Switching of ACC / IGN1 / IGN2 terminals.
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Control of the STARTER relay BAT line (high side) based on communication with EMS ECU.
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Management of the Immobilizer function.
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Management of BES warning function.
Button Engine Start System
The Button Start System allows the driver to operate the vehicle by simply pressing a button (called as SSB) instead of using a standard mechanical key.
If the driver presse the SSB while prerequisites on brakes, fob authentication and transmission status are satisfied, the BES System will proceed with the locking/unlocking of the steering column, the control of the terminal, and the cranking of the engine.
The driver can release the SSB as soon as this sequence is initiated. After positive response from immobilizer interrogation, the system will activate the starter motor and communicate with the EMS to check the engine running status for starter release.
The driver will be able to stop the engine by a short push on the SSB if the vehicle is already in standstill. Emergency engine stop will be possible by a long press of the SSB or 3 consecutive presses in case the vehicle is in ENGINE RUNNING.
If the conditions for engine cranking are not satisfied while a push on the SSB is detected and a valid fob authenticated, the system will unlock the steering column and switch the terminals to IGN. Another push on the SSB will be necessary to start the engine.
In case of a vehicle equipped with SMART KEY system, fob authentication will not require any action from the driver. For limp home start or in case of vehicle without SMART KEY, the driver will have to insert the fob into the fob holder.

    Circuit Diagram (1)

    Component

    Other information:

    Hyundai Genesis (DH) 2013-2016 Service Manual: Specifications

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    Hyundai Genesis (DH) 2013-2016 Service Manual: General Safety Information and Caution

    Instructions When Handling Refrigerant 1. R-134a liquid refrigerant is highly volatile. A drop on the skin of your hand could result in localized frostbite. When handling the refrigerant, be sure to wear gloves. 2. It is standard practice to wear goggles or glasses to protect your eyes, and gloves to protect your hands.

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