thekeylab.co.uk - Replacing a Remote Or Fob
The battery in the key fob is going to eventually run out, whether you have an ordinary Lexus Key that operates the ignition on or an intelligent key for your vehicle that starts by pressing the button. It's easy to replace it with a paperclip: Pop the battery that is in use, insert the new one (refer to the owner's manual to determine the type of battery you need), and clip it back into the correct position.
Keys
Lexus keys aren't easy to replace and require a professional locksmith for replacing car keys to make a working spare. This is because every Lexus key is equipped with an embedded microchip that must be programmed in order to synchronise with your vehicle's immobiliser and if it's not, it'll not be able to start.
It takes a lot of time and equipment that is specially designed for this process to be done correctly. Each model has its own procedure for programming. Replacing a lost or damaged key or fob is a cost-effective service and one you should leave to professionals unless you have the proper tools and knowledge.
You'll need to replace the batteries in your smart or conventional key. Both keys function by turning the barrel of the ignition. It's a simple task to do however, you'll require an inexpensive Phillips Screwdriver, 20p coins and a paperclip. There are one or two screws on the back of the fob that holds the key. Unscrew them, and keep them safe (they are small and easy to lose). Remove the fob to reveal an indentation of circular shape for the key made from metal, take the battery out (using the paperclip) and replace it with the new one ensuring it's facing the right way up. Clip the the key to secure it.
Remotes
Replacing the Lexus remote or fob is an extremely complex process that requires expert locksmiths with both the right tools and expertise. Certain models require the transponder on the key to be programmed to work with the immobiliser systems of the car. The Lexus models employ different methods to program these chips. This is accomplished by using a specific device that transmits a code to the chip to unlock the doors or start the engine.
Certain Lexus vehicles are designed with a key head that is a combination of the key head and remote. They are much easier to replace, since there is no separate chip to replace. This kind of key could also be a little cheaper.
No matter what type of key any fob eventually runs out of battery power. It can be quite frustrating however, with a little bit of knowledge you can get your Lexus up and running again. Check out the owner's manual to determine which battery type you require. Then, search for an alternative. Find a small opening on the inside of your fob. Insert a coin (20p is a good choice) into the hole and twist. You should be able to see an area flat that you can remove with an ordinary paperclip.
Then, take the old battery out and replace the new one. Be sure the replacement battery is inserted with the proper orientation. Then, clip the outside of the fob back to its original position and reconnect the key to the metal.
Transponder Chips
Transponder chips are in the key heads of almost all new vehicles manufactured after 1995. They are used to disarm immobiliser systems. The head of a key that contains a transponder chip is able to be removed to reveal a steel L-shaped key. A transponder-chip replacement key, also known as a fob is a multistage process. It involves cutting the keys with precision and programming the chip to sync up with the vehicle's immobiliser.
Transponders are chips that has Non-Volatile Memory. It has a set windings, which are very delicate wires that are twisted around a tube. They look similar to those in an electric motor. These windings generate a signal that the car can read. If the code is correct it will allow the car to start.
There are two types of transponder chip, the one is known as the 80-bit and the second is called the circle + (General Motors). The first kind is reusable, but must be unlocked using a special machine in order to work on a vehicle that is compatible with the. The second type is more difficult to use as the old keys can be broken, drilled, or thrown out when key cases are changed. They can be salvaged, however and used with the service key, which doesn't require batteries to operate.
Immobiliser Systems
An immobiliser system is a security measure that uses electronic technology that deters thieves from starting your car. It operates by sending a signal from the vehicle to the key when you attempt to start it. The electronic chip in your key responds with a unique code which must match that in the vehicle to start. If the codes aren't compatible, the engine will stop immediately and prevent theft of your vehicle.
Modern smart keys and fobs have an embedded transponder which stores electronic security information in a format that cannot be easily copied. When the key or fob is inserted into the ignition, they send this code to the ECU. The ECU will then check it against the code stored in its memory and activates the ignition system and fuel circuit if the two match. If the codes do not match, the engine will not start - even if a thief tries to short-circuit the ignition circuit.
Replacing a fob or key is a multi-stage process that involves accurate cutting of the new key blade, and programming it to connect with the immobiliser system of your vehicle. There are a variety of immobilisers used in different years and models and each one requires its own unique programming procedure. We use Ross-Tech software to ensure that your replacement key is programmed correctly for optimum performance and maximum security.