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Saab Key Programming Saab cars built since about 1994 feature an immobilizer mechanism based on coded keys. To add an additional key, you need a new transponder, as well as special programming. This is usually done by the dealer using a Tech2 diagnostic tool. The issue is that it can 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 has an electronic chip. This chip sends a signal when the key is placed into the ignition. The car is able to check whether the signal is the same as the one on the key. If both signals match it will open itself and begin. This is a great method to prevent auto theft and keep your vehicle safe from thieves. Transponder keys are a common feature in cars, but it is important to know that they're not as secure as traditional metal keys. While the metal component of a conventional key can be cut and copied, a transponder is protected by an electronic chip. This chip contains a unique code that is 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. However, it will only do this if the key fob has an unmodified chip that has been programmed to match it. Otherwise, the car will reject the key and not start. It is important to have a spare Saab key. This is particularly important when you live in a rural area that is home to numerous car thieves. The good news is that it's possible to get a replacement key for your Saab without having to go to a dealership and pay the high costs that they demand. In most instances, you can get a brand new key made right on the spot at a fraction of the cost of what you would pay at dealerships. Key for Wired Saab cars typically come with two keys upon purchase. If you only have one, it's recommended to purchase an extra key fob as soon as is possible, because if you lose it, the car will require an entirely new CIM unit and the locking cylinders will need to be replaced. This can be expensive especially for cars that are used. The next step is to connect the wires for columns and row to your microcontroller. This is the most challenging part of the project and will require a great amount of soldering. There isn't a standard way to accomplish this, but it's important to plan out how you will route and solder the columns and rows. For this keyboard, there are five rows and 17 columns. So there will be 22 microcontroller pins and wires to connect. After the columns and rows are soldered, it's time to connect them to key switches. To do this, you need to place a diode on each key switch pin and then solder it. This will shield the pins that are used for key switches from current and keep them from being shorted. The diode allows current to only flow in only one direction. It comes with a visual indicator with a black band that indicates the direction in which current will flow. Sanabria says that a few of the tools sold in auto parts stores, like the Autel MaxiIM IM608PRO and the IM508 will assist customers who are shopping or DIY customers to program replacement keys and restore immobilizer data. The tools plug into the OBD port and automatically guide the user through the process, making it easier than replacing the computer inside the vehicle. Jump starting the battery Most people keep a few sets of jumper cables in their trunk for emergency situations however, jumping a battery on newer cars might not be the best choice. These vehicles are equipped with a number of digital and electronic devices that communicate with each other. A voltage surge while a battery is hooked up to another can fry these components, rendering your vehicle unable to drive. Start the vehicle you are using and allow it to run for approximately two minutes before you connect the cables to the non-working one. Attach why not look here to the positive terminal of 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 underneath the car's hood—the engine block is an ideal choice. Don't connect the black cable to the negative terminal of the dead battery, as it could spark a spark that ignites the gasoline in the engine bay. Once the cables are connected, start the disabled vehicle and allow it to run for around five minutes before you disconnect them in reverse order. The battery in your Saab 9-3 is recharged as you drive. It will take a while for it to return to its original state. It is recommended to purchase another key fob as soon as possible. Replacing the only one that works requires the installation and programming of a new computer chip. Replacement case Saab owners usually only have one car key, and if that is lost, they will be charged. It's expensive to add an additional key and it requires replacing the CIM or TWICE in the case of older models. In the event of theft or any other disaster it is advisable to have an extra key. Even even if the key is “new”, it will not work. The dealer will charge you top dollars if you only have one working key. We can reset and reprogram the computer's EEEPROM to make it ready to accept a replacement key without replacing the entire system. This could save you a significant amount of money. It's much cheaper instead of waiting until you loose the only key.