Mitsubishi Eclipse. Technical Information Manual (1994) — part 74

Power
relay

window

Power window
main switch

Ignition switch

Fusible link

V

Door switch

BODY Doors

3. Operation of LOCK Switch
When the lock switch of the power window main
switch is placed at the lock position, the front

the power window main switch or power window
sub switch.

ger’s side power window cannot be operated by

Power

window

motor

Power

window

motor

Power window

sub-switch

BODY Keyless Entry System

4-15

KEYLESS ENTRY SYSTEM

The radio wave remote control type

entry

system has been adopted. The system is similar
to the one introduced on the 1993 3000GT. It allows
all the doors to be locked and unlocked by remote
control. (Option)
The system consists of a transmitter and receiver
added to the conventional central door lock mecha-

nism. Even if the

entry system fails, the

doors can be locked and unlocked by the key.
The system offers the following features.

l

Because of the radio wave remote control de-

sign, the operating range of the system is about
6 m (20 ft.) from the vehicle in all directions.

l

The receiver has a built-in memorize/operation
changeover switch (programming switch). Even

if the transmitter is lost, the whole system need
not be replaced. Just program a new transmitter

to the receiver.

l

The receiver can store two secret codes. There-
fore, two transmitters can be used for a single
vehicle.

Receiver

l

A timer lock function has been adopted so that
even if the unlock switch of the transmitter is

pressed by mistake, all the doors will be
locked unless any of the doors is opened within
a period of 30 seconds after the unlock switch
has been pressed.

l

For confirmation of system operation at night,

a confirming function flickers the dome light
twice after the doors have been locked, and

keeps the dome light lit for three seconds after

the doors have been unlocked. (The dome light
switch, however, must be in the “DOOR” posi-
tion.)

NOTE

The foot light also simultaneously flashes or

lights with the dome light.

Transmitter

Drive

signal

Drive
signal

Dome light

‘When locked:

Flashes twice.

When unlocked:

Lights for

three seconds.

1

BODY

Entry System

Part name

Transmitter

Receiver

Function

Sends its secret code by the radio wave signals.

Switched over between the operation and memorizing modes by the code registration
switch.

In the operation mode, the receiver compares the signal received from the transmitter by

the built-in antenna with the code stored in the receiver and outputs the drive signal to the

ETACS-ECU and dome light only when the signal coincides with the code.
In the registration (programming) mode, the receiver stores the signals from the transmitter
in the EEPROM in the receiver as a new code.

Outline of the System

Transmitter

- - - - -

Lock switch

Indicator light

Receiver

r - - - - - - - - - - - - - - - - - - - _ _ _

1

Antenna

I

Stored
code

Code registration

switch

Dome light

I

Control circuit

I

I

i

I

ECU

STRUCTURE AND OPERATION

TRANSMITTER
The transmitter is a key holder type independent of the master

ignition key. The transmission switch comprises two switches

which independently perform the lock and unlock functions.
When the transmission switch is operated, the secret code

unique to the transmitter is transmitted in radio form.

The transmitter has an indicator light which lights when the
transmission switch is placed in the ON state. The light makes

it possible to confirm switch operation and battery discharge.

The battery comprises two lithium cells (CR2016) and offers
a life expectancy of about two years at a rate of use of 10
times/day.

Entry System

Transmission switch

Transmission code

Data code

Cyclic code

Transmission Code
The illustration at left shows a code transmitted from the trans-

mitter. When the switch is operated once, three data codes

following the cyclic code are sent. One data code comprises
a total of 51 bits, of which 21 bits are used to constitute a
secret code for identification of the user, and the remaining
25 bits are used for system identification, etc. The secret code
for user identification is a combination of

and

More

than a million combinations are available.

RECEIVER

The receiver is mounted at the driver’s side rear
quarter panel. The receiver has a code registration
switch by which the receiver is switched between
the system operation mode and code registration

mode.
Normal

entry system operations are per-

formed in the system operation mode. In the system
operation mode, the signals transmitted from the
transmitter are compared with the code stored in
the EEPROM in the receiver. Only when the results
are in agreement, a signal is output to the

ECU to lock or unlock the doors and cause the

dome light to flash (when the doors are locked)
or steadily light (when the doors are unlocked). (The
dome light switch, however, must be in the “DOOR”

position.)

When the transmitter or receiver is replaced, note
that the secret code unique to the transmitter and

the code stored in the EEPROM in the receiver
will be out of agreement. To allow operation of the
system, the code sent from the transmitter must
coincide with the code stored in the receiver. For
this purpose, place the receiver in the registration

mode and write (transmit) the secret code assigned

to the transmitter in the EEPROM in the receiver
as a new code.
The EEPROM can store two codes. Since the user

has only one transmitter at first, the EEPROM stores

two identical codes at shipment. When the user
wants to use one more transmitter, a maximum
of two transmitters can be used by repeating the

registration operation to the EEPROM.
(EEPROM: Electrical Erasable Programmable
ROM which allows data to be electrically erased
and rewritten)

Code registration switch

(L.H.)