PUSH BUTTON START SYSTEM [ADVANCED KEYLESS ENTRY SYSTEM]

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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).

Engine restarting by depressing clutch pedal function

•  If the start stop unit determines that the driver intends to restart the engine because the engine has stalled, the engine restarting by depressing clutch pedal function restarts the engine.

•  The start stop unit determines that the driver is seated based on the conditions that the driver's seat belt is fastened and the driver's door is closed, and it determines that the driver intends to restart the engine when the clutch pedal is depressed from a released condition within 3 s after the engine stalls.

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 is input to the start stop unit.

2.  When the start stop unit detects a push button start signal, it sends a request outgoing command signal to the LF control unit.

3.  When the LF control unit detects the request outgoing command signal, it sends a request signal using all the keyless antennas in the vehicle interior.

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

5.  The keyless receiver transmits the received ID data to the start stop unit.

6.  The start stop unit verifies the ID data and if it matches the steering lock in the module is released and the power supply is switched simultaneously to illuminate the push button start indicator light (amber). For details on the power supply switching, refer to [POWER SUPPLY SWITCHING]. (See POWER SUPPLY SWITCHING.).

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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 start stop unit determines that either the clutch pedal position switch or starter interlock 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.

―  Start stop unit detects that either clutch pedal position switch or starter interlock 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

Engine restarting by depressing clutch pedal

1.  The start stop unit enables the engine restarting by depressing clutch pedal function operation when all of the following conditions are met.

―  Within 3 s after engine-stall signal is received via CAN communication from PCM (1)

―  Driver buckle switch off signal (seat belt fastened) is received via CAN communication from SAS control module (2)

―  Driver door latch off signal (door closed) is received via ISO communication from rear body control module (RBCM) (3)

2.  If all of the following are detected, the start stop unit sends an engine starting enabled signal (3) to the PCM via CAN communication and restarts the engine.

―  Clutch pedal position (CPP) switch off to on (clutch pedal depressed) detected (1)

―  Starter interlock switch off to on (clutch pedal depressed) detected (2)

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Guidance function

Advice display for engine-start

•  If all of the engine-start conditions are met, the key indicator light (green) in the instrument cluster and the push button start indicator (green) illuminate.

•  Under the following conditions, the start stop unit 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 (instrument cluster type A).

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 start stop unit 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 (instrument cluster type A).

Condition	Instrument cluster			Push button start
	Keyless warning alarm	KEY warning light (red)	Multi-information display	Indicator light (green)
ID data cannot be verified	―	Flashes		―
Steering lock cannot be released	Pattern C*1	―		Flashes for 10 s