SYSTEM OPERATION
KEYLESS OPERATION SYSTEM (KOS)
42B-17
Four data codes are transmitted when a switch is
operated once. The encrypted code for user identifi-
cation is a combination of 0 and 1, and more than 1
million different combinations are available. To pre-
vent theft by copying signal codes, the data code
includes a rolling code with the encrypted code. The
rolling code changes each time a signal is sent.
RECEIVER
The receiver is incorporated into the KOS-ECU
together with the receiving antenna. The receiver
compares the signal which the antenna received
from the keyless operation key with the registered
encrypted code and the stored code of the receiver,
and when they coincided, outputs a signal from the
KOS-ECU. By connecting M.U.T.-III to the diagnosis
connector, up to four encrypted codes of keyless
operation keys can be registered.
KEYLESS ENTRY HAZARD LAMP
ANSWERBACK FUNCTION
The hazard answerback function that allows check-
ing the lock/unlock state of the door easily even in
the daytime is installed. When the LOCK signal from
the keyless operation key is input to ETACS-ECU, all
doors (including tailgate) are locked and the hazard
warning lamp flashes once. When UNLOCK signal is
input, all doors (including tailgate) are unlocked and
the hazard warning lamp flashes twice. Using a cus-
tomisation function, the hazard answerback can be
enabled/disabled (Refer to
P.42B-31
).
KEYLESS ENTRY ROOM LAMP ANSWER-BACK FUNCTION
AC508281AB
ON
OFF
Transmitter lock or unlock button
Data
code
AC207001AB
ON
OFF
OFF
ON
OFF
LOCK
UNLOCK
Illuminate
Extinguish
Keyless entry
transmitter
switch
Lock relay output
Unlock relay output
Hazard
warning lamp
AC612545AB
ON
OFF
ON
OFF
ON
OFF
ON
OFF
a
a: 0.25 second
b: 0.72 second
c: 2 seconds
d: 3 seconds
e: 15 seconds
a
b
d
b
b
c
d
e
Illuminate
Extinguish
Illuminate
Extinguish
Lock relay output
Unlock relay output
Lock switch output
Unlock switch output
Room lamp
Hazard
warning lamp