Keyless Entry: Description and Operation

Circuit Description

The ETACM controls the keyless entry & burglar alarm system. Burglar Alarm Operations-When the ETACM receives abnormal input signals (for instance hood switch signal, left/right door unlock signal, trunk unlock switch signal, etc.) the hazard relay coil is energized through the ETACM and battery voltage is supplied to the turn signal lamps.

And the ETACM controls the siren.

Keyless Entry Operations-When the ETACM receives code signals from the Keyless entry transmitter, the ETACM compares the received code signals with memorized code. If the codes are aligned, the ETACM sends signal to the door modules and turn signal lamps.

According to the signals, the turn signal lamps are flashed several times and the doors are opened.