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Saab Key Programming Saab cars built since about 1994 feature an immobilizer mechanism based on coded keys. In order to add a second key, it requires the purchase of a new transponder as well as special programming. This is usually handled by the dealer using a Tech2 diagnostic tool. It can be costly. Always keep an extra set of keys available. 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 placed in the ignition. The car is able to check whether the signal is the same as the one on the key. If the signals are in sync it will unlock and start. This is a great method to safeguard your car from theft. Transponder keys can be an extremely popular accessory for automobiles, but they are not as secure as traditional metal keys. While the metal component of a conventional key can be cut and copied however, a transponder is secured by an electronic chip. The chip has a unique code that is inserted into a car's computer in order to identify it. The car will recognize the Saab keyfob, and allow it to be turned on. The car will only recognize the key fob when it has a chip that is unmodified and has been programmed to match. The car will not start when the key isn't programmed to match. It is important to have an extra Saab key. This is especially true when you live in a rural location where there are a lot of car burglars. The good news is that it's possible to obtain a replacement key for your Saab without having to go to an auto dealer and pay the expensive prices that they demand. You can have the replacement key on the spot at a fraction of the cost you would pay at dealerships. Wired key Saab cars are usually provided with two keys. If you only own one, you should get an additional key as fast as you can. This is because if the key is lost 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 purchasing a used car. The next step is to connect the row and columns wires to your microcontroller. This is the most difficult part of the project, and it will require lots of soldering. There's no standard way to do it, but you must think about how to route and connect each column and row. There are 22 microcontroller wires as well as pins to connect for this keyboard. It includes 5 rows and 17 columns. After the rows and column are soldered together, it is time to connect the key switches. To do this, place a diode across each pin of the key switch and then solder it. This will shield the pins of the key switch from current and stop them from being shorted. A diode allows 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 some of the tools that are sold in auto parts stores, like the Autel MaxiIM IM608PRO and IM508 can assist customers who are shopping or DIY users to program replacement keys and restore immobilizer information. The tools plug into the OBD port and automatically guide the customer through the procedure, making it much easier than replacing the computer in the vehicle. Jumpstarting the battery Most people keep a set of jumper cables in their trunk to use in an emergency however, jumping a battery on newer cars might not be the best idea. These vehicles have many electronic devices and computers that communicate with one another. A voltage surge when the battery is connected another battery could damage the components, rendering your car undriveable. Connect the cables to the vehicle operating. Let it run for two minutes. Attach the red clip to the positive terminal of the good battery. (It will read “POS” or “+”.) Attach the other end to a clean, unpainted metal surface under the hood of the disabled vehicle. The engine block is an excellent option. saab 93 key replacement is not to be connected to the negative terminal of the dead battery. This could result in sparks that could ignite the gasoline in the engine compartment. Once the cables are connected, you need to begin the car and allow it to run for around five minutes. Then, disconnect them in reverse. Be aware that the battery in the Saab 9-3 gets recharged when you drive, so it may take some time for the battery to come back down again. It's a good idea buy a spare key fob as soon as you can, because replacing the only working one requires the installation of a new computer module and special programming to convince it that your missing keys are not trying to steal the car. Replacement Case Saab owners typically only have one car key, and if it is lost, they'll be charged. It's costly 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 other catastrophe it is recommended to have an extra key. However, don't purchase a secondhand key even the case that it's “new.” Keys that are claimed as new from aftermarket sellers will not perform and are almost certain to fail at the crucial moment. The dealer will charge you top dollar if you only have one working key. We can reset and reprogram the computer's EEEPROM in order to make it ready to accept a new key without the need to replace the entire system. This can save you lots of money. It's also a lot cheaper than waiting until you lose your one key.