Key Fob Replacement for the Seat Ibiza
This fifth-generation Ibiza that has been revamped and is a contender in the supermini segment. It competes with Renault Clio and Peugeot 208 as well as the Ford Fiesta.
Using a thumb nail or small flat head screwdriver (A), prise upwards the key fob battery compartment cover (B). Replace the CR2025 coin battery, making sure it is placed in the correct direction and in the right polarity.
Dead Coin Battery
A dead battery on a coin is the most typical cause of a key fob not locking or unlocking your vehicle. It will usually show symptoms before it dies like a lower range or no power at any time. It is easy to replace it with a brand new (CR2025) one at your local grocery store. Be aware that using the wrong or unsuitable batteries can cause damage to your key fob. Make sure that the new battery has identical in size, specifications and voltage as your old one.
If your device has been exposed to clean water, like rainwater or soapy tap water It is probable that corrosion has caused damage to the chip's electronic circuit. You can clean the chip with isopropyl or electronic cleaners to see if that can help, but that the chip has been damaged.
The simplest option is to buy an entirely new key fob. Most major car dealers offer key fobs and they can be installed by a skilled mechanic. You can also purchase them online, like on eBay. The best method is to work on a flat, level surface with good lighting. It is much easier to work on the smaller parts. You will also be able to avoid placing things in the wrong place. Always work on your key fob in a location that is secure and safe.
Water Damage
If your key fob gets wet from dropping it into the pool or slipping it in the washing machine you might think that it's gone but there's still hope. The problem begins when the circuit board inside the fob comes in contact with water - it is a great conductor and shorts out components. It also accelerates the process of corrosion and rust.
Fortunately, this is easy to fix. Find replacement seat key to place inside the fob. A tissue or a paper towel will be ideal. Use a cotton swab with isopropyl to clean the circuit board and any other components. The fob should dry for some time in a dry and warm environment.
Replace the battery after the fob is dry by a new one with the same size and polarity ('+' (pointing upwards). It can be difficult to open up the fob to reach the battery, but if you have a small screwdriver that is flat that you have at hand, it will be able to insert easily. After the fob is reassembled, it should work like normal. If it isn't working you may need to re-program it or replace the module.
Radio Interference
When a keyfob operates properly, it transmits a radio signal that is absorbed by a receiver module inside your car. If the signal is not received the key fob won't function. This can be caused by objects or weather conditions, or other transmitters operating on the same frequency near your car.
This can cause your key fob's button to not work the car's systems such as the ignition switch or security system. In this scenario, it would be best to replace the battery in your key fob.
Some aftermarket LED lighting that utilizes the same frequency as a remote key fob can interfere with the signal, preventing it from reaching the receiver modules. To avoid interference, the LED light must be switched off or to an alternative frequency.
If you've just replaced the battery on your key fob but the problem persists, it is likely that the key fob's antenna is damaged or inoperable. The antenna is responsible for transmitting a signal between the key fob and the receiver module. An OBDII scan will aid in diagnosing the issue by telling you exactly what's wrong with the system. The scanner will ask you for details about your particular vehicle like the model and make as well as the engine type and VIN number.
Faulty Receiver Module
The key fob is equipped with a receiver module that sends signals for locking and unlocking. If the receiver module develops a fault and the on-board electronics will cease to function. If this is the case, reprogramming with an OBDII scanner or replacing the key fob may aid.
This problem can be caused by a dead coin-cell battery, water damage or signal interference. Try resetting the on-board computer by disconnecting the battery 12 volts for 15 minutes. This will draw out any remaining electricity that could be causing problems. Take the cable off first of the negative terminal, then the positive terminal. After 15 minutes, connect your battery in reverse order. First positive, then negative, and finally negative.
Dirt or water can harm the internal chip of the key fob. If your key fob stopped functioning after being wet, wash it with isopropyl, or an electronics cleaner. Then, reinstall the battery. If it stops working after exposure to salty or soapy water the chip may be damaged and must be replaced.
Another possibility is a damaged antenna module fuse that is sending the lock or unlock signal to the vehicle. Depending on the model the fuse can be located in one of the many locations like the engine bay, the side of the dashboard, beneath the rear seat, or in the trunk.