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Saab Key Programming Saab cars built since 1994 feature an immobilizer system that relies on keys that are coded. Adding an extra key requires the purchase of a new transponder as well as special programming. This is usually done by the dealer using the Tech2 diagnostic tool. It can be costly. It is recommended to always have a spare set of keys in your possession. Transponder key The transponder key is a piece of hardware with an electronic chip that sends a signal to the car when it is put into the ignition. The car then checks to see whether the signal matches the one on the key. If the signals are the same the car will then unlock itself and begin. This is a great method to prevent car theft and keep your vehicle secure from thieves. Transponder keys are a popular feature in automobiles, however you should be aware that they are not as secure as classic keys made of metal. The metal part of the traditional key is easily cut and copied, whereas transponders are protected by an electronic chip which protects it. The chip has a unique code which is programmed into the car's computer in order to identify it. When a Saab key fob is used the car recognizes it and allows it to turn on. The car can only recognize the key fob if it is equipped with a chip that is unmodified and has been programmed to match. In the absence of that, the car will reject the key and refuse to start. It is vital to have a spare Saab key. This is especially important if you live in a rural region where there are many car thieves. You can purchase a new key for your Saab by visiting the dealership without paying expensive costs. In most cases, you can have a new key made on-the-spot at a fraction of the cost you'd pay at an auto dealer. Wired key Saab cars typically come with two keys when they are new. If you have only one, it's best to acquire an extra key fob as quickly as you can as if you lose it, your car will require a new CIM unit, and the locking cylinders will need to be replaced. This can be costly, especially if you are purchasing a used vehicle. The next step is connecting the wires of columns and row to your microcontroller. This is the most difficult part of the project and will require a large amount of soldering. It's not a common way to do it, however, you should think about how to connect and solder each column and row. For this keyboard, there are five rows and 17 columns. This means there will be 22 microcontroller wires and pins to connect. After saab keys replacement G28 Car Keys and rows are soldered, it's the time to connect them to the key switches. To do this, put an inverter over each pin of the key switch and then solder it. This will protect the pins of the key switch from current and prevent them from being shorted. A diode only allows the flow of current to be in one direction, and it has an indicator of black color that indicates the direction in which current will flow. Sanabria states that a number of the tools sold in auto parts stores, like the Autel MaxiIM IM608PRO and the IM508 are able to assist customers shopping or DIY customers to program replacement keys and restore immobilizer information. The tools plug into OBD ports and guide the user through each step and make the process more straightforward than replacing the car's computer. Jump-starting the battery The majority of people have a set in their trunk to start a car in an emergency, but it may not be a good option for vehicles with newer technology. These cars are equipped with a variety of electronic devices and computers that communicate with each other. A surge of voltage when a battery is connected to another can fry the components making your car unusable. Connect the cables to the vehicle working. Let it run for two minutes. 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 vehicle's hood. An engine block is an ideal choice. Do not connect the black cable to the negative terminal of the dead battery, as this could trigger an ignition spark that ignites the gasoline in the engine bay. After the cables have been connected, you can start the car and allow it to run for around five minutes. Then disconnect the cables in reverse. The battery in your Saab 9-3 is recharged while you drive. It will take some time for it to drop back down. You should invest in an additional key fob when you can. The replacement of 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 that involves replacing the CIM (Column Integration Module) or TWICE on older models, as well as programming. It's best to have a spare key in the event of theft or other disaster and the best option is to purchase an extra key as soon as you can. Don't purchase a used key even the case that it's “new.” Keys that are claimed-new from sellers selling aftermarket keys won't perform and are almost certain to fail at the crucial moment. The dealer will charge you top dollars if you only have one working key. However, we can reset and re-program the computer's EEPROM in order to prepare it to accept a new key without replacing the entire system. This can save you lots of money. It's also much less expensive than waiting until you lose your one key.