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Saab Key Programming Saab cars made since 1994 use an immobilizer that relies on keys that are coded. To add an additional key, you need the purchase of a new transponder as well as special programming. This is usually done by the dealer using the Tech2 diagnostic tool. The issue is that it can be extremely expensive. This is the reason why you should always keep a spare key in your possession. Transponder key The transponder can be described as a key equipped with an electronic chip. This chip sends a signal when the key is put in the ignition. The car then examines the signal to determine whether it is the same as the one on the key. If the signals match, the car will unlock and begin. This is a great way to protect your car from theft. Transponder keys are a common feature in automobiles, however you must be aware that they aren't as secure as traditional metal keys. The metal part of the traditional key can be easily cut and copied, however transponders have an electronic chip that protects it. The chip has an individual code that is programmed into the car's computer to identify it. The car will recognize the Saab keyfob and allow it to turn on. But, it's only able to do so if the key fob has an unmodified chip that has been programmed to match it. Otherwise, the car would refuse to accept the key and will not start. It is essential to have a spare Saab key. This is especially true when you live in a rural area, where there are a lot of car burglars. You can get a new key for your Saab by going to the dealership without paying their pricey costs. In most instances, you can get a new key created on-the-spot for less than half the price of what you would pay at the dealer. Key for Wired Saab cars typically come with two keys when they're new. If you have only one, it is an ideal idea to purchase an extra key fob as quickly as you can as if you lose it the car will require a new CIM unit, and the locking cylinders have to be replaced. This could be expensive particularly if you are purchasing a used vehicle. The next step is to connect the wires for columns and row to your microcontroller. This is the most difficult part of the project and will require a large deal of soldering. There is saab key fob programming standardized way to accomplish this, but it is crucial to plan the routes you'll use to solder the columns and rows. For this keyboard, there are five rows and 17 columns, which means there will be 22 microcontroller wires and pins that you need to connect. 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 shield the pins from current and prevent them from being shorted. A diode allows current to only flow in one direction. It is equipped with a visible indicator, a black band, that indicates the direction in which current will flow. Some of the tools offered at auto parts stores- such as the Autel MaxiIM IM608 Pro and IM508 — could help customers in the shop, or even DIY customers in certain cases programme replacement keys and recover the lost immobilizer's data, Sanabria says. The tools connect to the OBD port and automatically guide the customer through the process, making it easier than replacing the computer in the vehicle. Jump-starting the battery Most people keep the set in their trunks to start a car in case of emergency, but it might not be a good idea for cars with more modern technology. These vehicles are equipped with numerous computers and digital devices which communicate with one another. A voltage surge while the battery is connected to another could cause damage to the components and render your car undriveable. Connect the cables to the vehicle working. Let it run for two minutes. Attach the red clip on the positive terminal of the battery that's good. (It will say “POS” or “+”.) Attach the other end of the black cable to an unpainted, clean metal surface beneath the damaged vehicle's hood. An engine block is an excellent choice. The black cable is not to be connected to the negative terminal of the dead battery. This could cause a spark, which would ignite the gasoline that is in the engine compartment. Once the cables are connected, you can start the vehicle that has been disabled and let it run for about five minutes before disconnecting them in reverse order. The battery in your Saab 9-3 will recharge as you drive. It takes a while for it to drop back down. It is a good idea to purchase a spare fob as soon as you can, since replacing the sole working one requires the installation of a new computer module and a special program to convince the system that your 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, they'll be charged. 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, and programming. It is best to have a backup key in case of theft or any other catastrophe and the best option is to purchase an additional key as soon as you are able to. Don't purchase a used key even when it's “new.” Keys that are claimed as new from a second-hand store will not work and are almost guaranteed to fail at the crucial moment. The majority of locksmiths won't be able to help in the event that you only have one working key, and the dealer will charge high fees to replace the computer in your vehicle to make a new replacement. We can reset and reprogram the computer's EEEPROM to be able to accept a new key without replacing the entire system. This could save you a lot of money. It's cheaper to do this than wait until you lose the only key.