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Saab Key Programming Saab cars built since about 1994 feature an immobilizer mechanism built on coded keys. A new transponder is required in order to enable the addition of an additional key, and special programming. This is usually done by the dealer using the Tech2 diagnostic tool. The issue is that this could be very costly. This is the reason why you should always have a spare key on hand. Transponder key The transponder is a type of key that is equipped with an electronic chip. This chip sends out a signal when the key is inserted in the ignition. The car is able to check whether the signal matches with the one on the key. If the signals are in sync the car will then unlock and begin. This is a fantastic way to guard your car against theft. Transponder keys are a favored feature in vehicles, but it is important to know that they're not as secure as traditional metal keys. The metal part of the traditional key can be easily cut and copied, however a transponder has an electronic chip which protects it. This chip contains an unique code that's programmed into the car's computer in order to identify it. The car will recognize the Saab keyfob and allow it to turn on. The car will only recognize the key fob if it is equipped with a chip that is unmodified and has been programmed to match. Otherwise, the car would reject the key and refuse to start. It is important to have a spare Saab key. This is particularly important when you live in a rural region where there are numerous car thieves. saab key code is that it's possible to get a replacement key for your Saab without needing to visit an auto dealership and pay the hefty prices that they charge. In most cases, you can have a new key created on-the-spot at a fraction of the cost you would pay at the dealer. Key for Wired Saab cars usually come with two keys upon purchase. If you have only one, you should purchase an additional key as fast as you can. This is because if you lose it and the car is damaged, it will require an entirely new CIM and the locking cylinders replaced. This could be expensive particularly if you are buying a second-hand car. The next step is connecting the wires for columns and rows to your microcontroller. This is the most laborious component of the project and will require lots of soldering. There isn't a standard method to do it, however, you should determine how to route and connect each column and row. There are 22 microcontroller wires and pins that you can connect for this keyboard. It includes 5 rows and 17 column. After the rows and column are soldered together after which it is time to connect the key switches. Solder a diode to each key switch pin. This will protect the pins that are used for key switches from current and prevent them from being shorted. The diode will only allow the flow of current to be in one direction, and it has an indicator in black that shows the direction in which current will flow. Sanabria says that a few of the tools offered in auto parts stores, such as the Autel MaxiIM IM608PRO and IM508 are able to assist customers who are shopping or DIY customers to program replacement keys and restore immobilizer information. The tools connect to OBD ports and guide the user through each step making the process simpler than replacing the car's computer. Jump starting the battery Most people keep the set in their trunk to jump-start their car in an emergency, but it may not be a good idea for vehicles that are newer. These vehicles are equipped with many digital and computer systems that communicate with one another. A voltage surge while a battery is hooked up to another battery could fry these components and render your vehicle undriveable. Start the vehicle that is working and allow it to run for around two minutes before connecting the cables to the battery that is not working. Attach the red clip to the positive terminal of the battery that is good (it will have “POS” or “+” on it). Attach the other end to a clean and unpainted metal surface under the hood of the damaged car. The engine block is an excellent alternative. The black cable should not be connected to the negative terminal of the dead battery. This could trigger sparks, which would ignite the gasoline inside the engine compartment. Once the cables are connected, start the vehicle that has been disabled and let it run for about five minutes before you disconnect the cables in reverse order. The battery in the Saab 9-3 will charge as you drive. It may take a while it to fall back. You should invest in a second key fob, as soon as possible. Replacing the one that works requires the installation and programming of a brand new computer chip. Replacement case Saab owners usually only have one car key, and if it is lost, they'll be charged. The reason is that it's not inexpensive to replace a key, and it involves replacing the CIM (Column Integration Module) or TWICE on older models, plus programming. It is recommended to have a backup key in case of theft or any other catastrophe, and the best way is to buy an extra key as soon as you are able to. Don't purchase a used key, even the case that it's “new.” Keys that are claimed to be new from aftermarket sellers will not work and are almost guaranteed to fail at the critical moment. The dealer will charge you the highest dollar if you have only one working key. However, we can reset and reprogram the computer's EEPROM to accept the new key, without replacing the whole system. This can save you a great deal of money. It's cheaper to do this rather than wait until you lose the only key.