The 556UW start interface module is used when installing remote start products in vehicles equipped with a transponder or RF (Radio Frequency) based immobilizer system. This type of system uses a small chip imbedded in the ignition key, called a transponder, to transmit a very low powered RF signal. This signal is picked up through an antenna (or coil) around the ignition switch which is then sent to the immobilizers transceiver. Once the correct signal is received, the immobilizer will enable the ignition and/or fuel systems. If an attempt is made to start the vehicle and the transceiver does not receive a valid code, the ignition and sometimes the fuel systems are disabled. The immobilizer system will then render the remote start useless. The 556UW bypasses the immobilizer system only while the remote start is in use, maintaining the factory systems integrity. When the remote start system is not in use the factory immobilizer remains fully functional.
556UW
556U (CLAMSHELL)
556UB (BOA CLAMSHELL)
Notes:

Requires use of a spare key for the vehicle.
Replaces 555U, 555UW, 555B, 555BW


Selectable key windings provide ability to tune kit to specific transponder frequency used by different manufacturers.
Simple jumper selection to tune kit for European vehicles (60 windings) or domestic (18 windings)
Tamper prevention circuit provides ability to open keysense circuit to prevent immobilizer module from reading two RFID's at once and going into tamper mode.
Keysense trigger provides ability to shut off universal transpondear bypass as soon as drivers ignition key is put into cylinder for key take over. This prevents the vehicle from detecting the 2nd RFID of drivers key and causing a tamper code. Works with any aftermarket remote start system.
Compatible with the factory anti-theft system
Maintains the integrity of the factory anti-theft system
2 jumper selectable antenna ring settings.
Compact design, easy to mount.
No programming required
Maintains the integrity of the factory anti-theft system