Keyless Entry: Description and Operation
CIRCUIT DESCRIPTIONThe ETACM controls the keyless entry & burglar alarm system. When the ETACM receives abnormal input signals (for instance, hood switch signal, left/ right door unlock switch signal, trunk unlock switch signal, etc..), Burglar Alarm Operations. 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.
When the ETACM receives code signals from the keyless entry remocon, keyless entry operations. The ETACM compares the received code signals with memorized code. If the cods 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.