DOOR
BODY
42-13
CIPHER CODE
The left figure shows a code which is sent from the RKE trans-
mitter. When the button is pressed once, two data codes will be
sent. The cipher code has one million kinds by combining 0 and
1. In addition, the cipher code also includes a rolling code
which varies per transmission. This rolling code prevents unau-
thorized duplication.
ETACS-ECU (RECEIVER)
• The ETACS-ECU incorporates a receiver with an
antenna. The receiver compares the code sent
from transmitter with the code retained in the
receiver through the antenna.
• The ETACS-ECU sends a signal only when those
two codes correspond and the rolling code is
judged to be correct.
• All of those output signals are processed inter-
nally in the ETACS-ECU.
• A maximum of four cipher code (4 transmitters)
can be registered by connecting the data link
connector to the scan tool MB991502.
FUNCTION FOR CONFIRMING ETACS-ECU (RECEIVER) OUTPUT AND OPERATION
When the ETACS-ECU (receiver) sends a signal to
the door lock actuators, the turn-signal lights and
dome light illuminate and horn sounds (when lock-
ing), indicating that the keyless entry system is acti-
vated.
TIMER LOCK FUNCTION
• The ETACS-ECU (receiver) sends a door lock
signal automatically unless any door is opened
within 30 seconds after the doors have been
unlocked by the keyless entry system while all
doors are closed.
• This function prevents unlocking the doors unin-
tentionally.
OPERATION CONDITIONS
The keyless entry system is prohibited from operat-
ing when the key is inserted in the ignition switch.
OPERATION OF TRANSMITTER OPERATION OF KEYLESS ENTRY SYSTEM
Lock button Press once Lock all doors
Unlock button Press once Unlock the driver’s door
Press once more Unlocks all doors
AC212263AB
TRANSMITTER UNLOCK SWITCH
ON
OFF
DATA
CODE
ITEMS OPERATION
DOORS LOCKED DOORS UNLOCKED
ETACS-ECU (receiver) Sends lock signal Sends unlock signal
Dome light Flashes twice Illuminates for 15 seconds
Turn-signal lights (RH and LH) Flashes twice Flashes once
Horn Sounds once
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