Operating The Transmitter Unlock Button Press Once

When the transmitter unlock button is pressed once, the ETACS-ECU energizes its door unlock relay to operate the door lock actuator of the driver's door for 0.25 second thus causing only the driver's door to be unlocked.

Fig 1: Identifying Transmitter Unlock Button Function (Press Once)

Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.