Below schematic illustrates the 1998 Hyundai Trajet Immobilizer Control System Circuit and Wiring Diagram. The 1998 Hyundai Trajet immobilizer control system consists of transponder key, coil antenna, ICM (immobilizer control module), and engine control module. When ignition is “ON”, the coil supplies energy to the transponder, which in turn accumulates energy in the condenser.