Mitsubishi Eclipse 1990 Service Manual page 1904

Entry System
METHOD OF REGISTERING A SECRET CODE
Each individual secret code is registered inside the transmitter,
and so it is necessary to register these codes with the received
in the following cases.
When either the transmitter or receiver is replaced;
If a second transmitter is to be used;
If it appears that a problem is occurring because of faulty
registration of a code.
A maximum of two different codes per transmitter can be
stored in the memory area of the EEPROM, and up to two
different transmitters can be used. When the codes for the
first transmitter are registered, the previously-registered codes
for both transmitters are cleared. Therefore, if you are using
two transmitters or are adding a second transmitter, the
for both transmitters must be
(1) Check that the door locking function works normally using
the door key.
(2) Connect the scan tool to the data link connector.
NOTE
This grounds the data link connector
for a code registration.
Caution
Turn the ignition switch to OFF before connecting
or disconnecting the scan tool.
(3) Close all doors.
(4) Turn the ignition switch to ACC and return it to OFF.
NOTE
This locks and unlocks the door once, and then a code
can be registered.
(5) After pressing any switch on the transmitter once, press
it two more times within 10 seconds to register the same
code for SET I and SET II.
(6) After registration is completed, the doors will automatically
be locked and unlocked once.
(7) If you are using two transmitters or have added a second
transmitter, the same registration procedure should be
carried out for the second transmitter, and it should be
carried out within one minute after registration of the codes
for the first transmitter has been completed. After the
second registration is completed, the doors will automati-
cally be locked and unlocked once.
(8) Registration mode finishes under the following conditions.
Registration of two transmitter codes are completed.
One minute has passed since the registration mode
setting.
Scan tool is disconnected. (ground released.)
Ignition switch is turned ON.
Any of the doors are opened.
TSB Revision
the same time.
and gets ready