Model 28623TN - Ready Remote

Step 5, Immobilizer Bypass ModulesMost newer vehicles have a factory engine immobilizer systemdesigned to prevent any unauthorized use of the vehicle. Theseimmobilizers will cut off power to the starter and the fuel supplypreventing a thief from starting the vehicle.There are several types of immobilizers, with the most commonbeing the resistance-based passlock/passlock 2 systems found onmost newer GM vehicles. This system can be bypassed using the20402, 29402 or 556L immobilizer bypass modules available atyour local authorized retailer or at www.directedstore.com. Themajority of transponder-based immobilizer systems can bebypassed using the 20402, 29402 or 556U immobilizer bypassmodule available at your local authorized retailer.The WHITE/BLACK wire of the 6-pin harness supplies a 400mA (-)output as soon as the control module begins the remote startprocess. This wire can be used to activate an immobilizer bypassunit.note! Any vehicle equipped with a factory immobilizermust use an immobilizer bypass module toremote start. If not used, the vehicle ignition orfuel supply circuits could lock up and require acostly trip to the dealer to reset the computer system.To determine which bypass module your vehicle requires, use thewebsite Interface Module Look-Up tool atwww.autocommand.com.30 © 2006 Directed Electronics