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Saab Key Programming Saab cars made since 1994 use an immobilizer system based on a set of keys. The addition of a key requires an entirely new transponder and programming. This is usually done by the dealer using a special Tech2 diagnostic tool. The problem is that this can be extremely expensive. This is the reason why you should always have a spare key on hand. Transponder key The transponder key is a piece of hardware equipped with an electronic chip. It sends a signal back to the car when it is inserted into the ignition. The car then checks to see whether the signal is the same as the one on the key. If the signals match the car will then open and start. This is a great method to prevent auto theft and keep your car safe from thieves. Transponder keys could be an increasingly popular feature for automobiles, but they are not as safe as traditional metal keys. While the metal portion of a traditional key may be cut and copied but a transponder key is protected by an electronic chip. This chip contains a unique code programmed into the car's computer to identify it. When a Saab key fob is used the car recognizes it and allows 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. The car won't start when the key isn't programmed to match. It is vital to have a spare Saab key. This is especially true when you live in a rural area that is home to many car thieves. You can purchase a new key for your Saab by visiting the dealership without paying high prices. You can get the replacement key on the spot at a fraction of the price you'd pay at the dealership. Wired key Saab cars are usually provided with two keys. If you have only one, it is recommended to get an additional key as quickly as you can. This is because if the key is lost, the car will need a new CIM and the locking cylinders replaced. This can be costly, especially if you are purchasing a used car. The next step is to wire the wires of the column and row to the microcontroller. This is the toughest component of the project and will require lots of soldering. It's not a common way to go about it, but you need to plan how to route and connect each column and row. There are 22 microcontroller wires and pins to connect for this keyboard. It has five rows and 17 columns. After the columns and rows are joined after which it is time to connect the key switches. To do this, you need to place a diode on each pin of the key switch and then solder it. This will protect the pins of the key switch from current and stop them from being shorted. A diode permits current to only flow in one direction. It features a visual indicator with a black band that shows which way current will flow. A few of the tools that are available at auto parts stores — such as the Autel MaxiIM IM608 Pro and IM508 — can assist customers at the shop or DIY customers in certain instances programme replacement keys and recover lost immobilizer data, Sanabria says. The tools plug into OBD ports and guide the customer through each step, making the process easier than replacing the vehicle's computer. Jump-starting the battery The majority of people have an item in their trunks to jump-start their vehicle in the event of an emergency, but this might not be the best idea for newer cars. These vehicles are equipped with many digital and computers that communicate with one another. A voltage surge while a battery is hooked up to another one could damage the components and render your car undriveable. Connect the cables to the vehicle operating. Allow it to run for two minutes. Attach the red clip to the positive terminal of the good battery. (It will read “POS” or “+”.) Attach saab 9 3 key replacement of the black cable to a clean, unpainted metal surface underneath the disabled car's hood. The engine block would be a good choice. Don't connect the black cable to the negative terminal of the dead battery as this could trigger a spark that ignites the gasoline in the engine bay. Once the cables are connected the vehicle that has been disabled and let it run for about five minutes before you disconnect the cables in reverse order. Keep in mind that the battery on your Saab 9-3 is recharged during your drive, which means it can take a while for the battery to go down. You should consider purchasing another key fob as soon as you can. Replacing the one that works requires the installation and programming of a new computer chip. Replacement case Saab owners typically only have one car key, and if that is lost, they will be charged. It's expensive to buy an additional key and it requires replacing the CIM or TWICE in the case of older models. It is best to have a spare key in case of theft or any other catastrophe, and the best way is to purchase an extra key as soon as you can. Even it's “new”, it won't work. The dealer will charge you the highest dollars if you only have one working key. We can reset and reprogram the EEEPROM of your computer for it to accept a new key without having to replace the entire system. This can save you a great deal of money. It's also a lot cheaper than waiting until you lose your sole key.