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Saab Key Programming Saab cars manufactured since 1994 feature an immobilizer mechanism that is based on codes for keys. A new transponder is required in order to enable the addition of an extra key, and special programming. This is usually done by the dealer with a specialized Tech2 diagnostic tool. The issue is that it can be very costly. This is why it is important to always keep a spare key in your possession. Transponder key The transponder can be described as a key that has an electronic chip. The chip sends a signal when the key is put into the ignition. The car will then check the signal to see whether it is identical to the one that is in the key. If the signals match it will unlock and start. This is a great way to stop car theft and keep your vehicle safe from thieves. Transponder keys are an increasingly popular feature in automobiles, however you should be aware they're not as secure as classic keys made of metal. saab key fob of a traditional key can easily be cut and copied, whereas the transponder is protected by an electronic chip which protects it. The chip is a unique code which is programmed into a car's computer in order to identify it. The car will recognize the Saab keyfob, and allow it to be turned on. However, it is only able to do so if the key fob is unmodified and has a chip that has been programmed to match it. The car will not start in the event that the key is not programmed to match. It is vital to have a spare Saab key. This is especially true for those who live in a rural location where there are a lot of car burglars. The good news is that it's possible to find a new key for your Saab without having to go to a dealership and pay the hefty prices that they charge. In most instances, you can get a new key made on-the-spot at a fraction of the cost you would pay at an auto dealer. Wired key Saab cars are usually provided with two keys. If you only have one, it's a good idea to get an extra key fob as quickly as you can since if you lose it the car will require a new CIM unit and the locking cylinders need to be replaced. This could be expensive especially if you're buying a second-hand car. The next step is connecting the wires for columns and row to your microcontroller. This is the most challenging part of the project and requires a significant amount of soldering. There's no standard way to accomplish this, but it is important to think about how you will route and solder the rows and columns. There are 22 microcontroller wires as well as pins to connect for this keyboard. It includes 5 rows and 17 column. After the columns and rows are soldered together after which it is time to connect the key switches. Solder a diode on each key switch pin. This will protect the pins from current, preventing them from being shorted. A diode can only allow the current to flow in a single direction, and it comes with a a black band visual indicator that indicates the direction in which current will flow. Sanabria says that a few of the tools available in auto parts stores, including the Autel MaxiIM IM608PRO and the IM508, can help customers shopping or DIY customers to program replacement keys and restore immobilizer information. The tools connect to the OBD port and guide the user through the process, making it more simple than replacing the computer inside the vehicle. Jump starting the battery A lot of people keep a set of jumper cables in their trunks to use in an emergency however, jumping a battery on newer vehicles may not be the best choice. These vehicles are equipped with many electronic devices and computers that communicate with each other. A voltage surge when batteries are connected to another could cause damage to the components making your car unusable. Start the vehicle that is working and let it run for about two minutes before you connect the cables to the non-working one. Attach the red clip to the positive terminal on the battery that is good (it will have “POS” or “+” on it). Attach the other end of the black cable to a clean, unpainted metal surface under the disabled car's hood. The engine block is an ideal choice. The black cable should not be connected to the negative terminal of the dead battery. This could cause sparks that could ignite the gasoline that is in the engine compartment. Once the cables are connected the vehicle that has been disabled and let it run for approximately five minutes before disconnecting them in reverse order. The battery in your Saab 9-3 will be recharged as you drive. It will take some time for it to return to its original state. It's a good idea buy a spare key fob as soon as you can, because replacing the one that works requires the installation of a new computer module and a special program to convince it that the lost keys aren't in the process of trying to steal the car. Replacement case Many Saab owners have only one key for their car and if they lose it, the cost will be. The reason is that it's not inexpensive to add a new key, and that involves replacing the CIM (Column Integration Module) or TWICE on older models, plus programming. In the event of theft or any other catastrophe it is recommended to have a spare key. Even it's “new” it won't work. The dealer will charge the highest dollar if you only have one working key. We can, however, reset and reprogram the computer's EEPROM in order to prepare it to accept the new key without having to replace the entire system. This could help you save a significant amount of money. It's much cheaper rather than wait until you lose the sole key.