DEI 556UW Universal Remote Start Immobilizer Bypass Module
Most new and late model vehicles have factory anti-theft systems to prevent a vehicle being started without the specific owner's key in the ignition. These factory anti-theft systems provide a valuable service to the vehicle owner helping to prevent a thief from hot-wiring and starting your vehicle. Unfortunately these systems also prevent a remote starter from starting your vehicle, unless you left the key in the ignition, which could easily result in vehicle theft.
Directed Electronics, Inc (DEI), the world leader in remote start technology and factory interface systems, has developed a complete line of 555–series modules that interface with the factory anti-theft systems only during the remote start operation. Therefore the DEI 555-series Bypass Modules do not compromise your factory anti-theft system, preserving its integrity, and leaving it fully functional at all other times. DEI Bypass Modules give you the best of both worlds, maintaining the protection of your factory anti-theft system, while enabling you to enjoy the convenience and comfort of a DEI Valet Remote start system.
Of course, you need to use the correct DEI Bypass Module for your specific vehicle. See the DEI Bypass Reference Chart for the correct DEI 555 Series Bypass Module for your vehicle.
The DEI 556UW immobilizer interface module (bypass module) is used when installing a remote starter in vehicles equipped with an 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 detected through an antenna (or coil) around the ignition switch, which is then sent to the immobilizer's transceiver. Once the correct signal is received, the immobilizer will enable the ignition and fuel systems. If an attempt is made to start the vehicle and the transceiver does not receive a valid code, the ignition and fuel system is disabled. The 556UW bypasses the immobilizer system only when the remote start is in use, thus maintaining the factory system's integrity. When the remote start is not in use, the factory immobilizer system remains fully functional.
One of the vehicle's coded keys must be installed permanently inside the 556UW. When the remote start is activated, the 556UW reads the chip in it's key and sends the signal to the vehicle's immobilizer transceiver enabling the vehicle to start and run with the remote starter. When the remote start is shut off, the 556UW disconnects from the transceiver, returning the vehicle to it's full protection.
DEI 556UW Universal Bypass Module
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