Key Fob Replacement for the Seat Ibiza
The facelifted fifth generation Ibiza is a contender in the crowded supermini segment. It goes toe-to-toe with the Renault Clio, Peugeot 208 and Ford Fiesta.
Make use of a small screwdriver with a flat head or a thumbnail (A) to break open the battery compartment cover on the key fob (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 coin battery is the most common reason of a key fob that isn't locking or unlocking your vehicle. After it has died, you will see the decrease in range or no power. It is simple to replace it with a brand new (CR2025) one from your local store. Be aware that faulty or unsuitable batteries may damage the key fob. Make sure that the new battery has identical in size, specifications and voltage as your old 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 might try cleaning your chip using isopropyl alcohol or an electronic cleaner to see if it helps but it is most likely that the chip has been damaged and fried.
The most simple solution is to purchase an entirely new key fob. seat keys sell keys and can be installed by an experienced mechanic. You can also buy them online, like on eBay. The best method is to work on a flat surface that has excellent lighting. It is much easier to work on the small parts. This can also help to avoid placing anything back in the wrong location. Always keep the key fob in a secure and safe place.
Water Damage
If your key fob is soaked by dropping it in the pool or throwing it in the wash you might think it's a goner but there's still hope. The problem starts when the circuit board in the fob comes into contact with water - it makes an excellent conductor and shorts components. It also accelerates the process of rust and corrosion.
This is an easy fix. Simply locate something absorbent and place it inside the fob - a paper towl or tissue works well. Then you can use a cotton swab dipped in isopropyl alcohol and wipe down the circuit board as well as other components to eliminate any battery acid residue or contamination. The fob should dry for a few days in a dry and warm environment.
Replace the battery when the fob has dried out by a new one with the same size and the same polarity ('+' (pointing upwards). The fob might be difficult to open to access the battery, but when you have a flat head screwdriver on hand, it should be easy to insert. After the fob is reassembled it should function like normal. If it doesn't work, you may have to re-program it or replace the module.
Radio Interference
If a key fob is functioning properly, it emits an audio frequency signal that is picked up by the receiver module in your car. If the signal is interrupted, your key fob will not work. This could be due to objects such as weather conditions, objects, or other transmitters operating at the same frequency close to your car.
This could cause your key fob to not activate the vehicle's functions, such as the ignition switch or security system. In this instance it's best to replace the battery in your key fob.
Some LED lighting from the aftermarket that uses the same frequency as a remote key fob might interfere with the signal and stop it from reaching the receiver modules. The LED lighting must be switched off or changed to a different frequency in order to be able to avoid interference.
If the issue is still present after replacing the battery, the antenna of your key fob may be damaged or not functioning properly. The antenna is responsible to transmit a signal between the key fob and the receiver module. A scan of the OBDII can aid in diagnosing the issue by revealing what's wrong with your system. The scanner will ask you for details about your car, including the model, make and engine type as well as the VIN number.
Faulty Receiver Module
The key fob contains a receiver module that transmits the signals to lock and unlock. The electronic components on the board will cease functioning if this component has a problem. If this happens then reprogramming the module using an OBDII scanner or replacing the key fob could assist.
There are a variety of possible causes for this issue which could be due to the battery of the coin is dead, water damage or signal interference. You can reset the onboard computer by disconnecting the 12 volt batteries for 15 minutes. This will remove any remaining electrical energy that could be causing issues. Begin by removing the cable from the negative terminal of the battery first, followed by the positive terminal. After 15 minutes, connect your battery in reverse order. Positive first, then negative second.
The internal chip in the key fob can also be damaged by water or dirt. If your key quit working after getting wet, you need to clean the electronic component with isopropyl Alcohol or an electronics cleaner before reinstalling the battery. If it is not working after exposure to salty or soapy water, the chip is probably damaged and needs to be replaced.
A defective fuse for the antenna module may also be the cause. It is the fuse that transmits a signal to the vehicle to lock or unlock. Based on the model you have the fuse can be found in a variety of places such as the engine bay, to the left of the dashboard, under the rear seat, or trunk.