Immobilizer Interface Module

The Directed 556U is a universal immobilizer interface module essential for integrating remote start systems into vehicles equipped with RF-based factory immobilizer systems. These systems rely on a transponder chip within the ignition key to transmit a signal that enables the ignition and fuel systems. If an incorrect code is detected, the vehicle's immobilizer disables these systems, rendering remote start functions useless. The 556U module elegantly solves this by bypassing the immobilizer system exclusively during remote start activation. This ensures that the vehicle's factory anti-theft system remains fully functional when the remote start is not in use, maintaining vehicle security. The module itself is constructed from durable metal and plastic and features a simple two-wire connection for straightforward installation. Installation of the 556U requires an active vehicle ignition key to be housed within the interface module. It is typically mounted underneath the steering column. The module includes a 6-pin harness for power, ground, and status inputs, along with connections for the ignition and key-sense outputs. Professional installation is recommended for this component, as it requires vehicle matching and integration with other necessary parts for proper operation.