PUSH BUTTON START SYSTEM [KEYLESS ENTRY SYSTEM]

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Outline

•  A push button start system has been adopted that automatically performs authorization of the remote transmitter being brought within the request signal output range of the keyless antennas.

Function

•  When the push button start is pressed, the push button start system performs authorization of the remote transmitter that is within the request signal output range of the keyless antennas.
―  Engine start: When the remote transmitter authorization is performed while the engine starting conditions are met, the engine starts.
―  Power supply switching: When the remote transmitter authorization is performed, the ignition can be switched between OFF, ACC, and ON (engine on).
•  The guidance function displays methods of resolving issues, such as insufficient conditions for starting the engine, or remote transmitter authorization issues, in the multi-information display.

Structural View

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System Wiring Diagram

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Operation


Remote transmitter verification

1.  When the push button start is pressed, a push button start signal (1) is input to the body control module (BCM).

2.  When the body control module (BCM) detects a push button start signal, it sends a request signal (2) using all the keyless antennas in the vehicle interior.

3.  The remote transmitter receives the request signal from the keyless antennas, and transmits ID data (3) to the keyless receiver via LF control unit.

4.  When the keyless receiver receives ID data, it sends (4) the ID data to the LF control unit via serial communication. The LF control unit verifies the ID data, and if the ID data matches, it sends the verified result (5) to the body control module (BCM).

5.  The body control module (BCM) releases (6) the steering lock and at the same time switches the power supply to turn the push button start indicator light (amber) on. For details on the power supply switching, refer to the [POWER SUPPLY SWITCHING].(See POWER SUPPLY SWITCHING.)

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Engine-start operation

•  When all of the following conditions are met, the ignition switches ON (engine on) when the push button start is pressed.
Engine start conditions
―  Brake pedal is depressed
―  Actual shift position is P
―  Shift position selector lever is shifted to is P position
―  Remote transmitter is within request signal output range of keyless antennas in vehicle interior


Guidance function

Advice display for engine-start
•  Under the following conditions, the body control module (BCM) sends an advice request signal by using CAN communication to the instrument cluster.
•  When the instrument cluster receives an advice request signal, it displays the conditions which have not been met in order to start the engine in the multi-information display.

Condition

Multi-information display
Ignition is switched ON (engine off) from OFF (LOCK) without depressing brake pedal
Ignition is switched ON (engine off) and selector lever is not in P position when pressing push button

Display of methods for resolving issues
•  Under the following conditions, the body control module (BCM) sends a warning request signal via CAN transmission to the instrument cluster to flash the KEY indicator light.
•  When the instrument cluster receives the warning request signal, it displays the method for resolving an issue in the multi-information display.

Condition

Instrument cluster

Push button start

KEY indicator light (green)

KEY warning light (red)

Multi-information display

Indicator light (green)

Indicator light (amber)
Engine start conditions are met
On
―
―
On
On
Push Button Start System has a malfunction
―
―
―
Flashes