Lancer LS L4-2.0L SOHC (2002)
Information Bus: Description and Operation
GENERAL DESCRIPTION
COMMUNICATION METHOD
The ETACS-ECU, the front-ECU and the column switch (incorporating the column-ECU) are connected each other by means of exclusive
communication line in order to transmit and receive multiplex data.
OPERATION
TONE ALARM FUNCTION
Ignition Key Reminder Tone Alarm Function
When the driver's door is opened (driver's door switch ON) without removing the ignition key [ignition switch to the "LOCK" (OFF) or "ACC"
position], the tone alarm will sound intermittently to remind the driver that the ignition key has not been removed.
Light Reminder Tone Alarm Function
When the driver's door is opened (driver's door switch ON) with lighting switch (taillight switch or headlight switch) in the ON position and ignition
switch in the "LOCK" (OFF) or "ACC" position, the tone alarm will sound continuously to remind the driver that the lights (taillights or headlights) are
ON. This function does not work if the taillights or headlights are switched off through the headlight automatic shutdown function. In addition, the
ignition key reminder tone alarm function has a priority over this function.
Seat Belt Tone Alarm Function
When the ignition switch is turned to the "ON" position without fastening the seat belts (seat belt switch OFF), the tone alarm will sound for
approximately six seconds to warn the driver to fasten the seat belts. When the seat belts are fastened, the tone alarm will stop sounding.
CENTRAL DOOR LOCKING SYSTEM
Central Door Locking System Operation
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When the driver's inside lock knob is locked or unlocked, the lock relay inside the ETACS-ECU turns on to lock or unlock all doors.
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With all the doors locked, turning the key in the driver's door unlocks the door. Turning it again makes the door unlock relay close to send a signal
for unlocking all doors.
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When the door lock switch (built into the power window switch) is operated, the lock or unlock relay inside the ETACS-ECU is turned on to lock
or unlock all doors.
POWER WINDOW RELAY CONTROL
Power Window Relay Operation
If the ignition switch is turned to "ON" position, the power window relay is energized to activate the power windows.
Power Window Timer Function
When the ignition switch is turned from the "ON" position to "LOCK" (OFF) or "ACC" position, the power windows can be operated for 30 seconds. If
any door is opened for the 30 seconds, the power windows will be immobilized at that point.
KEYLESS ENTRY SYSTEM
If the RKE transmitter "LOCK" or "UNLOCK" switch is pressed while the ignition key is removed, the doors can be locked or unlocked. If the doors are
closed, the hazard warning lights, the dome light and the horn will operate due to answerback function. Because of the answerback function, the hazard
warning lights flash twice, and the horn sounds once, the dome light flashes twice when the doors are locked. Meanwhile, when the doors are unlocked,
the hazard warning lights flash and the dome light illuminates for 15 seconds. The hazard and the horn answerback functions can be cancelled by using
