Key Fob Replacement for the Seat Ibiza
This fifth-generation Ibiza, which has been redesigned and is a contender in the supermini segment. It goes toe-to-toe with the Renault Clio, Peugeot 208 and Ford Fiesta.
Utilizing a thumb nail or small screwdriver with a flat-headed head (A) and pull upwards the key fob battery compartment cover (B). Replace the CR2025 coin battery, making sure it's in the proper direction and polarity.
Dead Coin Battery
A dead battery for a coin is the most common cause of a key fob that isn't locking or unlocking your vehicle. It will usually show symptoms before it dies like a decrease in range or no power at all. It is easy to replace with a brand new one (CR2025) from an area supermarket. Be aware that using the wrong or unsuitable batteries could cause damage to your key fob. Make sure that the new battery has the same size, specification and voltage as the older one.
If your fob was exposed to clean water, like rain or soapy tap water it is likely that the electronic chip inside has been damaged due to corrosion. You could clean the chip with isopropyl or electronic cleaners to see if that aids, but the chip is fried.
A new key fob is a simple solution. They are available at most major car dealers and can be fitted by a professional mechanic. They can also be purchased on the internet from sites like ebay. The best method is to work on a flat surface that has excellent lighting. It is easier to work with the smaller parts. This can also help to avoid putting something back in the wrong place. Always work on the key fob in a secured and safe space.
Water Damage
If your key fob gets submerged after dropping it into the pool or by slipping it in the wash, you may think that it's lost but there's hope. The issue begins when the circuit board within the fob comes into contact with water. It creates a fantastic conductor and shorts out components. It also increases corrosion and rust.
Fortunately, this is not difficult to fix. Simply locate something absorbent and place it inside the fob. Paper towl or tissue works well. Use a cotton swab with isopropyl for cleaning the circuit board, and any other components. Allow the circuit board to air dry in a warm, dry environment for several weeks.
Once the fob is dried out, replace the battery with another one of the same size and the same polarity ('+' directed upwards). It can be tricky to open the fob to get access to the battery, however if you have a small flat-head screwdriver at hand, it will slide in easily. Once the fob is assembled it should function just as normal. If it does not work you may need to re-program it or replace the module.
Radio Interference
When a keyfob operates properly, it broadcasts an audio frequency that is picked up by a receiver module inside your car. If the signal is distorted in any way the key fob won't work properly. This could be due to objects or weather conditions, or other transmitters that operate at the same frequency close to your car.
In this scenario it is best to replace the battery in your key fob. It is recommended to replace your key fob's battery.
Some LED lighting aftermarket that utilizes the same frequency as a key fob for remote control can interfere with the signal, stopping it from reaching receiver modules. The LED lighting must be turned off or switched to a different frequency to prevent interference.
If you've just replaced the battery in your key fob, and the problem persists, it's likely that the antenna on the key fob is damaged or malfunctioning. This is crucial since the antenna is responsible for sending a signal from the key fob to the receiver module. An OBDII scan can help diagnose the problem by telling you exactly what's wrong with your system. The scanner will request information about your specific vehicle like the model and make along with the engine type and VIN number.
Faulty Receiver Module
The key fob is equipped with an electronic receiver that transmits signals to lock and unlock the key fob. All on-board electronic components will cease functioning if this component becomes inoperable. Reprogramming seat key cover using an OBDII scan, or replacing it could help.
This problem could be caused by a dead battery in the coin-cell or a water damage or signal interference. It is possible to reset the on-board computer by disconnecting the 12 Volt batteries for 15 mins. This will draw out any remaining electricity that may be causing problems. Remove the cable first from the negative terminal, then from the positive terminal. After 15 minutes, connect your battery in reverse order. Positive first, then negative, and finally negative.
The internal chip of the key fob could be damaged by dirt or water. If your key's function stopped after being wet, clean the electronic component with isopropyl Alcohol or an electronics cleaner before installing the battery. If it stops working after exposure to soapy or salty water the chip is likely damaged and needs to be replaced.
Another possibility is a faulty antenna module fuse, which transmits the signal to lock or unlock to the vehicle. The fuse can be found in a variety of locations, based on the type of vehicle. For example, it could be under the rear seat, or in the trunk, or on the side of the dashboard.