Circuit Description
WARNING: This page is about a different car, the 2004 Suzuki Swift + and 2004 Chevrolet Aveo. However, it is still accessible from the selected car via links, so may be relevant.
The engine control module (ECM) initiates engine operation based on the immobilizer password received from the vehicle immobilizer, or vehicle theft deterrent (VTD) control module. The ignition key head contains a transponder that emits a magnetic field. This magnetic field interacts with the magnetic field generated by the coils of the theft deterrent control module creating a voltage. This voltage signal becomes the immobilizer password that is sent to the ECM. If the password is incorrect, or cannot be read by the ECM, DTC U0426 is set.