Originally posted by kromix
Awww man, I can't program it myself? I hope they cover me ;\

and so it is necessary to resister these codes with the
EEPROM inside the receiver in the following cases.
• When the transmitter or ETACS-ECU is replaced
• If more transmitters are to be used
• If it appears that a problem is occurring because of faulty
registration of a code.
A maximum of four different codes can be stored in the
EEPROM memory (four different transmitters can be used).
When the code for the first transmitter is registered, the
previously registered codes for all transmitters are cleared.
Therefore, if you are using four transmitters or are adding more
transmitters, the codes for all transmitters must be registered at
the same time.
1. Check that the doors lock normally when the key is used.
2. Insert the ignition key.
*CAUTION* To prevent damage to scan tool MB991502, always turn the ignition switch to “LOCK” (OFF) position before connecting or disconnecting scan tool MB991502.
3. Connect the scan tool to the data link connector. If the scan
tool is not used, ground terminal (1) of the data link
connector.
NOTE: This will connect terminal (1) of the data link
connector to ground, and the system will be in secret code
registration standby mode.
4. Press the hazard switch six times within 10 seconds.
NOTE: At this time the code registration monitor request is
output (all doors locked and unlocked) and becomes
registration mode.
NOTE: The hazard warning light switch is turned on and off
alternately whenever it is pushed.
5. Press the transmitter switch, and then press it two times
within 10 seconds of the first press. This will register the
code.
6. When registration is completed, the code registration
monitor request is output (all doors locked and unlocked).
7. If you are using two or more transmitters or have added a
second transmitter, the same registration procedure should
be carried out within one minute after registering the code
for the first transmitter. After the second registration is
completed, the code registration monitor request is output
(all doors locked and unlocked).
8. Registration mode will be canceled under the following
conditions:
• When the secret code for four transmitters has been
registered
• When one minute has been passed after registration mode
started;
• When scan tool MB991502 is disconnected (the ground
connection is broken);
• When the key is removed from the key cylinder;
9. After the registration is completed, carry out the following
work, and then check that the keyless entry system operates
normally.
• Remove the ignition key.
• Close all of the doors.