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Outline

Function

― 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).

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 via the LF control unit.

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

4.The keyless receiver transmits the received ID data (4) to the LF control unit. The LF control unit verifies the key ID number and if the ID data matches, it sends the ID data (5) to the body control module (BCM).

5.The power supply is switched to illuminate the push button start indicator light (amber). For details on the power supply switching, refer to POWER SUPPLY SWITCHING [(US)].

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Engine-start operation

• The remote transmitter authorization is performed and the engine starts by pressing the push button start when all the following conditions are met:

Engine start conditions

― Clutch pedal is depressed (MTX)

― Brake pedal is depressed (ATX)

― Selector lever is in P or N position (ATX)

― Remote transmitter is within request output range of keyless antennas in vehicle interior

Back-up mode (MTX) for engine-start

• If the body control module (BCM) determines that either the clutch pedal position switch or clutch cut switch is malfunctioning, the system switches to back-up mode.

• If the push button start is pressed when all the following conditions are met while in the back-up mode, the remote transmitter authorization is performed and the engine starts.

― Body control module (BCM) detects that either clutch pedal position switch or clutch cut switch is on

― Neutral switch signal is received via CAN communication from PCM

― 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 via CAN transmission 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 clutch pedal (MTX)
Ignition is switched ON (engine off) from OFF (LOCK) without depressing brake pedal (ATX)
Ignition is switched ON (engine off) and selector lever is not in P position when pressing push button (ATX)

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 push button start indicator (green).

• 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)
Engine start conditions are met	On	―	―	On
Push Button Start System has a malfunction	―	Flashes		―