Operating The Transmitter Unlock Switch Press Once

When the transmitter unlock switch 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 seconds thus causing only the driver's door to be unlocked.

Fig 1: Identifying Blinking Pattern (Driver's Door Unlock Function)

Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.