Keyless Entry System: General Description

WARNING: This page is about a different car, the 2005 Mitsubishi Endeavor. However, it is still accessible from the selected car via links, so may be relevant.

Antenna and receiver are incorporated in the ETACS-ECU.
ID code can be registered by using scan tool MB991958 (MUT-III sub assembly).
Transmitter is a key holder type, which incorporates lock button, unlock button and panic button.
When the transmitter unlock button is pressed once, the driver's door will be unlocked. If the button is pressed twice, all the doors and the liftgate will be unlocked. The adjustment function also allows you to open all the doors and liftgate by pressing the unlock button only once. For further details on using the multi-center display (middle grade type) to adjust the unlock operation, see ON-VEHICLE SERVICE .
When the transmitter is operated, the answerback function will work as follows:

Fig 1: Keyless Entry System - Answerback Function
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
The answerback operation can be altered as follows:
NOTE: Enabling/disabling the hazard warning light flashing, the horn sounding in accordance with the answerback function. For further details on using the transmitter to adjust answerback, see the section below P.42-75. For further details on using the multi-center display (middle grade type) to adjust answerback, see ON-VEHICLE SERVICE .

Fig 2: Diagnosis Procedure - Keyless Entry System
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
If none of the doors or liftgate is opened or the ignition key is not inserted in the ignition switch within 30 seconds after the doors and liftgate are unlocked using the transmitter, the ETACS-ECU will relock the doors and liftgate automatically. This is called "Timer lock function." This timer lock function prevents accidental unlocking of doors and the liftgate. The adjustment function allows you to change the timer lock period from 30 seconds (default setting) to 60, 120 or 180 seconds. For further details on using the multi-center display (middle grade type) to adjust the timer lock period, see ON-VEHICLE SERVICE .

NOTE: The timer lock period begins when the doors and liftgate are unlocked, and ends when the doors and liftgate is relocked automatically.