Mitsubishi Evolution X. Manual - part 90
SYSTEM OPERATION
TSB Revision
KEYLESS OPERATION SYSTEM (KOS)
42B-9
When a driver carrying a keyless operation key
presses the lock switch and the unlock sensor (door
outside handle) on the driver's/passenger's door out-
side handle or the trunk lid opener switch, the key-
less operation key and KOS-ECU communicate to
certify* the keyless operation key. When KOS-ECU
certifies the registered keyless operation key within
70 cm (28 inches) in radius from the outer side of the
vehicle, it requests ETACS-ECU to lock/unlock the
doors (Even within this range, the key may not be
certified when it is positioned too high or too low).
NOTE: *: In the communication for certification of the
keyless operation key, KOS-ECU judges if the key-
less operation key ID (specified to keyless operation
key) contained in the response data from the keyless
operation key coincides with the ID that has been
stored in ECU by registration operation. The keyless
operation key sends the response to KOS-ECU only
when the KOS ID (specific to KOS-ECU) contained
in the received data coincided with the stored ID. In
the beginning of the communication for certification,
KOS-ECU creates an encrypted code calculation
factor in random number, and sends it to the keyless
operation key together with the transmit data. The
keyless operation key calculates the code by using
the received factor, and sends the result to
KOS-ECU together with the response data.
KOS-ECU determines that the communication is
established only when the code calculation results of
both parties coincided.
.
UNLOCKING OPERATION OF DOOR
ENTRY FUNCTION
The keyless operation key and KOS-ECU communi-
cate to certify the keyless operation key when the
unlock sensor on the driver-side/front passen-
ger-side door outside handle or the trunk lid opener
switch is turned ON. When KOS-ECU certifies the
registered keyless operation key on the outer side of
the vehicle, it requests ETACS-ECU to unlock the
doors.
.
CONTROL OF UNLOCKING OPERATION
AC500829AD
ON
OFF
CAN
b
d
c
e
f
h
g
g
g
g
a
The unlock sensor of door outside handle
(driver's side, passenger's side) or the
trunk lid opener switch
Transmission
Communication
Un-communicating
Un-transmitting
Response
Un-answering
Transmission
Un-transmitting
Transmission
Un-transmitting
Keyless operation key
1 to 4 response
Exterior transmitter antenna
assembly opposite side
Interior transmitter antenna
assembly
Exterior transmitter antenna
assembly operation side
a: Exterior data transmitting start: 0.015 to 0.04 sec
b: Interior data transmitting start: 0.03 to 0.05 sec
c: Keyless operation key 1 response time of
onset 0.035 to 0.06 sec
d: Keyless operation key 2 response time of
onset 0.08 to 0.115 sec
e: Keyless operation key 3 response time of onset 0.135 to 0.18 sec
d: Keyless operation key 2 response time of onset 0.205 to 0.26 sec
g: CAN communication time of onset: to 0.3 sec
h: Retry time: It is variable by the registration number
(at the time of 4 pieces registration 3.1 sec).
If there is no keyless operation key
response, retry is performed once.
Jamming is not transmitted at
the time of trunk lid operation.