Saab Key Programming
Saab cars that were built prior to 1994 come with an immobilizer system that is based on codes for keys. The addition of a key requires a new transponder, as well as special programming. This is usually done by the dealer using a Tech2 diagnostic tool.
It can be costly. This is the reason why you should always have a spare key available.
Transponder key
The transponder key is a key with an electronic chip that transmits a signal to the car when it is inserted into the ignition. The car will check to see if the signal matches the one on the key. If the signals are in sync the car will then unlock and start. This is an excellent way to safeguard your car from theft.
Transponder keys are a common feature in automobiles, but you must be aware that they're not as secure as traditional keys made of metal. The metal part of the traditional key can easily be copied and cut, but the transponder is protected by an electronic chip that protects it. The chip contains a unique code that's programmed into a car's computers in order to identify it.
The car will recognize the Saab keyfob and allow it to turn on. However, it is only able to do this if the fob is equipped with a chip that is not modified that has been programmed to match it. The car will not start when the key isn't programmed to match.
It is crucial to have a spare Saab key. This is particularly important if you live in a rural area where there are a lot of car thieves. You can get a brand new key for your Saab by visiting the dealership without paying their pricey cost. In the majority of instances, you can get an original key made on the spot at a fraction of the cost of what you'd pay at an auto dealer.
Wired key
Saab cars typically come with two keys when new. If you have only one, it is recommended to 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 can be costly particularly if you are purchasing a used car.
The next step is to connect the wires of columns and row to your microcontroller. This is the most difficult part of the project and will require a good amount of soldering. There isn't a standard way to accomplish this, however it's important to plan out the route you'll take and solder the rows and columns. For this keyboard, there are five rows and 17 columns. So there will be 22 microcontroller wires and pins to connect.
Once the rows and columns are soldered, it's the time to connect them to key switches. Solder a diode on each key switch pin. This will protect the pins from current, thus preventing them from being cut off. A diode can only allow the flow of current to be in one direction, and it also has a the black band as a visual indicator that indicates which way the current will flow.
Sanabria states that some of the tools available in auto parts stores, including the Autel MaxiIM IM608PRO or IM508 will assist customers who are shopping or DIY customers to program replacement keys and restore immobilizer data. The tools connect to the OBD port and guide the user through the process, making it more simple than replacing the computer in the vehicle.
Jumpstarting the battery
The majority of people have an assortment of tools in their trunks to jump-start a car in case of emergency, but this might not be the best idea for vehicles that are newer. These vehicles have many computers and digital devices that communicate with one another. A surge in voltage while the battery is connected to another battery could fry these components and leave your vehicle unable to drive.
Connect the cables to the vehicle working. Allow it to run for two minutes. Attach the red clip to the positive terminal of the good battery (it will have "POS" or "+" on it). Attach the other end to a clear, unpainted metal surface under the hood of the disabled vehicle. The engine block is a great alternative. The black cable is not to be connected to the negative terminal of the dead battery. This could result in a spark, which would ignite the gasoline that is in the engine compartment.
Once the cables are connected, start the vehicle that has been disabled and let it run for about five minutes before disconnecting the cables in reverse order. Keep in mind that the battery on your Saab 9-3 is recharged while you drive, so it will take a while to get the battery back to normal. It is a good idea to buy a spare key fob as soon as you can, since replacing the one that works requires the installation of a new computer module and a special program to convince it that your lost keys aren't attempting to steal the car.
Replacement Case
Saab owners typically only have one car key, and if that is lost, they will be charged. The reason is that it's expensive to replace a key, and it 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 any other catastrophe and the most effective way is to purchase an additional key as soon as you can. Even when read on is "new" it won't work.
Most locksmiths can't help you with a single working key, and the dealer will charge for the cost of replacing the computer in your car for a replacement. However, we can reset and re-program your computer's EEPROM in order to prepare it to accept the new key without having to replace the whole system. This can save you a significant amount of money. It's less expensive than waiting until you lose your only key.