Engine Control Units (ECU)

The ECU is known as the vehicle computer. It provides controls for a variety of car-ecusystems within the engine. Most newer vehicles have started using a communication line between different modules on a vehicle so they can share information and redundant sensors do not have to be used. ECU in cars communicates to the car in many ways, For example a vehicle with a speed sensor at the wheel will send a message to the ECU to put the anti-lock brake module (ABS) on.


The ECU is also used to make a vehicle start.  It starts the car or van by using  a transponder system. A transponder microchip embedded in the head of the ignition key. This chip communicates with the vehicles engine control unit (ECU). When an attempt to start the vehicle is made, the interrogator sends a radio frequency in the area of the ignition barrel). This frequency contains a code number, which is usually made up of a 32 digit alphanumeric sequence. If the ECU recognises the code sent by transponder. The vehicle will be allowed to start. If the code does not match, the vehicle may start temporarily, then shut down, or it may not start at all.

For more information about ECUs and transponder keys contact us on 07565729487





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