Mitsubishi Evolution X. Manual — part 96
GENERAL INFORMATION
TSB Revision
WIRELESS CONTROL MODULE (WCM)
42C-3
Main components and functions
NOTE:
.
•
*
: Illuminates for tire pressure warning.
•
*
: Flashes for about 1 minute and then continuously illuminated for TPMS malfunction warning.
.
Parts name
Functional description
WCM
Controls the keyless entry functions, TPMS functions and starting of the engine
by using the following communications.
• Communications with ETACS-ECU, ECM, ASC-ECU and combination meter
via CAN
• Wireless communication with the ignition key (transponder)
• Wireless communication with the ignition key (transmitter) via the receiver
antenna assembly
Receiver antenna
assembly
Receives the operation signals from the lock/unlock buttons, trunk lid button,
and panic button on the ignition key (transmitter) as well as the tire pressure
signal from the TPMS transmitter. Then, transmits them to WCM.
Ignition key
The ignition key (transponder) receives signals sent from WCM, certifies the
key ID code, calculates the key ID, and sends the reply data signal to WCM.
The ignition key (transmitter) also sends signals to receiver antenna assembly
when the lock/unlock/trunk lid button and the panic button on it are operated.
Combination meter (Multi
information display, TPMS
warning light)
Communicates with WCM via CAN. Send ignition switch status. Receives the
warning request or warning information about TPMS from WCM, activates
*
the
TPMS warning light. Warning symbol and message is additionally displayed on
the multi information display.
ETACS-ECU
Communicates with WCM via CAN. By the door lock/unlock request, trunk open
request, or panic alarm request from WCM, ETACS-ECU outputs the
lock/unlock signal, trunk open signal, or panic alarm signal. When the door
lock/unlock signal is output, ETACS-ECU flashes or illuminates the turn signal
light and dome light to notify that the lock/unlock operation is performed.
ASC-ECU
Communicates with WCM via CAN. Sends the vehicle speed data.
ECM
Communication with WCM via CAN. Send atmospheric pressure data..
TPMS transmitter
Measure tire pressure directly, then send radio frequency signal to receiver
antenna assembly.
GENERAL INFORMATION
TSB Revision
WIRELESS CONTROL MODULE (WCM)
42C-4
System configuration
NOTE: In case of replacement of WCM, all keyless
ID, key ID and tire pressure sensor ID should be
re-registered using scan tool MB991958 (M.U.T.-III
sub-assembly).
AC709230
Door lock actuator
ETACS-ECU
Turn-signal light
Wireless control module
(WCM)
ECM
Combination meter
(Multi information display,
TPMS warning light)
Lock button
Unlock button
Indicator light
CAN-B
communi-
cation
CAN-C comm-
unication
AB
Trunk lid latch
Ignition key
Radio
frequency
signal
(transponder)
Front tire (LH)
Front tire (RH)
Rear tire (LH)
Rear tire (RH)
TPMS transmitter
CPU
Transmission
circuit
Antenna
Pressure
sensor
Acc.
sensor
Battery
ASC-ECU
Dome light,
Ignition key cylinder
illumination light
Horn
Panic button
Trunk lid button
Radio
frequency
signal
(transmitter)
Reciever antenna
assembly
Radio
frequency
signal (transmittter)
Head light,
Tail light
SYSTEM OPERATION
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WIRELESS CONTROL MODULE (WCM)
42C-5
SYSTEM OPERATION
KEYLESS ENTRY FUNCTION
M2422000400195
.
This keyless entry function has the following fea-
tures: A keyless entry system enables locking and
unlocking of all doors, the trunk lid from 12m (39.4
feet) away from the vehicle. The following features
are also available.
• A four-knob type transmitter with lock, unlock,
trunk lid and panic buttons.
• The receiver antenna assembly incorporates a
receiver and a receiving antenna.
• Up to eight key ID can be registered using scan
tool MB991958 (M.U.T.-III sub-assembly).
• Answerback functions
NOTE: The answerback function can be changed
using a customization function (Refer to
• Keyless entry timer lock
NOTE: Timer of the keyless entry timer lock can
be changed using a customization function (Refer
to
).
AC709257
AC708689
AC405616
PANIC
AC708642
AB
ETACS-ECU
WCM
Transmitter
Electric signal
Radio frequency signal
Lock button
Unlock button
Panic button
Trunk lid button
Receiver antenna assembly
Door lock actuators (lock/unlock)
Trunk lid latch assembly
The signal causes the hazard warning light to flash once
when the doors are locked, or flash twice when unlocked (Default).
The signal causes the dome light to extinguish when
the doors are locked, or come on for 15 seconds when unlocked.
SYSTEM OPERATION
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WIRELESS CONTROL MODULE (WCM)
42C-6
DESCRIPTION OF CONSTRUCTION AND
OPERATION
.
TRANSMITTER
• The transmitter is integrated into the master key.
The four-knob button is adopted, and the specific
encrypted code is transmitted as radio wave sig-
nal.
• An indicator light, which illuminates when signals
are sent, is added on the key grip. This indicator
light informs you of the signal transmission status
and warns you of flat battery.
• A signal transmission circuit (printed circuit) and
a battery are housed in one case. The case is
housed in the key grip, thus improving resistance
to water ingress.
• A coin type battery, CR1620 is used in the trans-
mitter.
• The functions of the immobilizer system are inte-
• Using a customization feature, the transmitter
button operation can be changed (Refer to
).
• The transmitter button operation allows the sys-
tem to operate as follows:
KEYLESS ENTRY FUNCTION OPERATION TABLE (DEFAULT)
.
PANIC
AC405616
AC405617
AC405710
Lock button
Unlock button
Panic button
<Front view >
<Back view>
Trunk lid button
AF
Three-diamond mark
Indicator light
Operation of transmitter
Operation of keyless entry function
Lock button
Press once
Lock all doors
Unlock button
Press once
Unlock the driver’s door
Press twice
Unlock all doors
Trunk lid button
Press twice (press once,
and then press again within
5 seconds)
Open the trunk lid
Panic alarm
system
Panic button
Press once (press and hold
for 1 second).
Starts the panic alarm (headlights flash and
horn honks for three minutes)
Lock button,
unlock button,
trunk lid button
or panic button
Press again
Stops the panic alarm in progress
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