Transponder Replacement & ECU Resetting
Issues arising from lost transponder keys are far more complex than tradition issues associated with older vehicles.
Transponder keys and the ECU immobilizer system work hand in hand with one another as a high level anti-theft security measure found in many modern vehicles. They work together via signal based communication, where the transponder key and ECU must have matching signals for the vehicle's engine to start.
What is a transponder key
Many car Manufacturers, post-1995, use transponder keys, which have an inbuilt chip that is used to communicate and deactivate the engine immobiliser. Transponder keys are essentially used as an extra anti-theft security measure for your vehicle.
Once the transponder key has been turned in the ignition, the ECU sends a low-level signal/code to the transponder circuit. The transponder circuit will then send a signal/code back, and if the code is incorrect, the car will not start. The code will often be incompatible as the wrong transponder key has been used. In newer cars, the transponder doesn’t even need to be put into the ignition, just inside the car for keyless starting and entry systems.
Transponder keys are far more reliable and secure than traditional automotive keys. Transponders can prevent hot wiring due to the fact that if the car does not detect the correct serial number on the key or does not receive the proper signal, then the vehicle will be immobilised.
Engine Control Unit (ECU)
The ECU is responsible for numerous vehicle functions, including the fuel supply, air management, fuel injection, ignition, and an engine immobiliser built within it as an anti-theft measure.Essentially the ECU is the brain/heart of any modern vehicle and if the ECU does not recognise the transponder key used within the ignition, the car engine will be immobilised and will not start.
Common Problems and Causes
Vehicle issues relating to the performance of a transponder key or the ECU immobiliser system are various as both do not function flawlessly. Both are essential for modern vehicles' anti-theft measures yet are capable of malfunctioning, which can potentially leave you and your car stranded.
WHAT ALCHIN LOCKSMITHS CAN DO TO HELP
If you have lost, misplaced or had the keys to your vehicle stolen, our experienced team at Alchin Locksmiths can supply, cut and program new keys to your vehicle. We can also remove, reset and reinstall the ECU immobiliser system with our equipment on site, eliminating all existing keys from the immobiliser system, ensuring that the old keys cannot be used.
All this is done at your convenience at the vehicle location.