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GWFLORID Maintenance Manual 186 Immobilizer System Immobilizer system composition This vehicle's engine immobilizer system consists of a theft deterrent ECU assembly, a theft deterrent coil as- sembly, and two theft deterrent converter assemblies. The theft deterrent coil assembly is put on the head of ignition lock cylinder, with the other end connected to the theft deterrent ECU assembly. The two theft deterrent converter assemblies are separately installed inside the plastic handles of the two keys. 1. Position diagram All the components of immobilizer system are assembled on the overall vehicle except for the theft deterrent converter assemblies inside the keys. They achieve communication functions via the wire harness connections. The following figure shows the position of each component in the overall vehicle. Theft deterrent controller Ignition lock key Theft deterrent coil Steering column 2. Theft deterrent controller The theft deterrent controller assembly mainly consists of a microprocessor and peripheral components. It com- municates with the password transmitter assembly and engine ECU. The theft deterrent controller assembly communicates with the engine ECU via the W wire, while communicating with the theft deterrent transponder assembly via radio frequency. The theft deterrent controller connects with the scanner via the K wire. Through the scanner, it can initiate matching, state controlling, and malfunction diagnostic on the immobilizer system. 3. Theft deterrent coil The theft deterrent coil assembly is installed on the ignition lock cylinder, the other end of wire harness plug is connected to the theft deterrent controller assembly. The theft deterrent coil assembly can generate an electromagnetic field to achieve communication between the theft deterrent controller assembly and the password transmitter assembly. 4. Transponder The theft deterrent transponder is installed inside the key handle. It has no power supply, maintains a small size, and long use life. It acquires electric energy and transmission signals using the stimulation of the electromagnetic field generated by the theft deterrent coil, so as to communicate with the theft deterrent controller assembly. |