Key Fob Replacement for the Seat Ibiza
This fifth-generation Ibiza that has been revamped is a contender for the supermini segment. It goes toe-to-toe with the Renault Clio, Peugeot 208 and Ford Fiesta.
With a thumb nail or small screwdriver with a flat head (A) and pull upwards the key fob battery compartment cover (B). Replace the CR2025 coin battery to ensure that it is fitted in the proper direction and polarity.
Dead Coin Battery
The most common reason for a key fob to not allow you to lock or unlock your car is a dead coin battery. Before it dies, you will notice the decrease in range or no power. It is simple to replace it with a new (CR2025) one from your local store. Be aware that using the wrong or unsuitable batteries can damage your key fob. Be sure that the replacement battery is the same size and voltage, and also the same specification.
If your device has been exposed to clean water, for example rainwater or soapy water from the tap, it is likely that corrosion has damaged the chip's electronic circuit. You may try cleaning the chip with isopropyl alcohol or an electronic cleaner to try to see if this helps but it is likely that the chip has been damaged and fried.
The most efficient solution is to buy a new key fob. Most major car dealers offer them and they can be installed by a skilled mechanic. You can also purchase them online, like on eBay. It is best to work on a surface with adequate lighting. This makes it easier to work on the small parts inside. This will also allow you to avoid putting anything back in the wrong spot. Always work on seat key transponder programming in a secured and safe area.
Water Damage
If your fob's key gets damaged by dropping it in the pool or by slipping it in the wash you might think that it's lost but there's a chance. When the circuit board inside the fob is exposed to water, it develops a conductor which shorts the components. It also speeds up the process of corrosion and rust.
Luckily, this is a simple issue to fix. Simply locate something absorbent and put it inside the fob - a paper towl or tissue work well. Then you can use the cotton swab, dipped in isopropyl alcohol and wipe down the circuit board and other components to get rid of any residues of acid from batteries and contamination. Let the fob air dry in a warm, dry environment for a few weeks.
Once the fob is dried out and the battery is replaced with a new one of the same size and polarity ('+' with the upwards direction). The fob can be difficult opening to access the battery, but If you have a flat-head screwdriver at hand it will be simple to slide in. Once the fob has been reassembled it should function just as normal. If it doesn't, then you'll need to reprogramme it or replace the receiver module.
Radio Interference
When a key fob functioning correctly, it transmits a radio frequency signal that is received by the module inside your car. If the signal is interrupted, your key fob will not function. This could be caused by objects, weather conditions or other transmitters operating on the same frequency near your vehicle.
This could cause your key fob's button to not work the vehicle's features, such as the ignition switch or security system. In this case it's best to replace the battery on your key fob.
A few LED lighting products that utilizes the same frequency as the remote control key fob may interfere with the signal, stopping it from reaching receiver modules. The LED lighting must be switched off or changed to a different frequency in order to be able to avoid interference.
If you've just replaced the battery in your key fob, and the issue persists, it's likely that the antenna on your key fob is damaged or malfunctioning. The antenna is responsible for transmitting signals between the key fob and the receiver module. An OBDII scan will assist in diagnosing the issue by revealing exactly what's wrong with the system. The scanner will ask you for details about your particular vehicle including the make and model, engine type, and VIN number.
Faulty Receiver Module
The key fob houses the receiver module which transmits the signals to lock and unlock. All electronic components that are on-board will stop working if this module becomes inoperable. If this is the case Reprogramming using an OBDII scanner or replacing the key fob itself may help.
There are a number of possible reasons for this problem which could be due to a dead coin battery, water damage or signal interference. You can reset your on-board computer if you disconnect the 12 volt batteries for about 15 minutes. This will drain any remaining power that could cause issues. The cable should be removed first from the negative terminal, then from the positive terminal. After 15 minutes, reconnect the battery in reverse order: positive first, negative second.
The internal chip in the key fob may be damaged by water or dirt. If your key stopped working when it was wet, wash the electronic component using isopropyl alcohol or an electronics cleaner before installing the battery. If the key stops working after being exposed to soapy or salted water, it is likely that the chip has become damaged and requires to be replaced.
Another possibility is a defective 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 model. For example it could be under the rear seat or trunk, or the side of the dashboard.