Saab Key Programming
Saab cars built since about 1994 have an immobilizer system built on coded keys. In order to add a second key, it requires an entirely new transponder and programming. This is usually done at the dealer using a special Tech2 diagnostic tool.
The problem is that this can be very costly. This is the reason why you should always have a spare key on hand.
Transponder key
The transponder is a key with an electronic chip. This chip sends a signal when the key is placed in the ignition. The car then analyzes the signal to see if it matches the one in the key. If the signals are in sync it will unlock and begin. This is a great way to stop auto theft and keep your car secure from thieves.
Transponder keys may be an extremely popular accessory for cars, but they are not as safe as traditional metal keys. While the metal part of a traditional key could be cut and copied however, a transponder is secured by an electronic chip. This chip has a unique code encoded into the car's system to identify it.
The car will recognize the Saab keyfob and allow it to turn on. However, it will only do this if your key fob is unmodified and has a chip that has been programmed to match it. saab 9-3 key fob programming will not start if the key is not programmed to match.
It is crucial to have an extra Saab key. This is especially important when you live in a rural area, where there are numerous car thieves. The good news is that it's possible to find a replacement key to your Saab without needing to visit an auto dealership and pay the high prices they ask. You can have a replacement key made on the spot for less than half the price you'd spend at the dealership.
Wired key
Saab cars typically come with two keys when they're new. If you only have one, you should purchase an extra key as soon as you can. This is because if the key is lost and the car needs a new CIM and the locking cylinders replaced. This could be expensive, especially if you are buying a second-hand car.
The next step is to connect the row and column wires to the microcontroller. This is the toughest component of the project and will require a lot of soldering. It's not a standard way to do it, but you need to think about how to route and solder each column and row. For this keyboard, there are five rows and 17 columns, so there will be 22 microcontroller pins and wires to connect.
After the rows and column are soldered together It is now time to connect the key switches. To do this, you need to place a diode over each pin on the key switch and solder it. This will shield the pins of the key switch from current and keep them from being shorted. The diode will only allow current to flow in one direction, and has a an indicator of black color that indicates the direction in which current will flow.
Sanabria says that some of the tools available in auto parts stores, like the Autel MaxiIM IMM608PRO and IM508, can help customers who are shopping or DIY users to program replacement keys and restore immobilizer data. The tools plug into the OBD port and guide the user through the process, making it more simple than replacing the computer inside the vehicle.
Jump-starting the battery
A lot of people keep a set of jumper cables in their trunk to use in an emergency however, jumping a battery for newer vehicles may not be the most efficient option. They have numerous digital and electronic devices that communicate with each other. A surge in voltage when a battery is hooked up to another one could damage these components and render your vehicle undriveable.
Start the working vehicle and allow it to run for approximately two minutes before connecting the cables to the one that is disabled. Attach the red clip on the positive terminal of the battery that's good. (It will read "POS" or "+".) Attach the other end of the black cable to a clean, unpainted metal surface under the disabled car's hood--the engine block is a good choice. Do not connect the black cable to the negative terminal of the dead battery because this could cause an ignition source that ignites gasoline in the engine bay.
Once the cables are connected the vehicle you are not using and let it run for about five minutes before disconnecting them in reverse order. The battery in the Saab 9-3 will charge as you drive. It may take a while it to return to its original state. It is a good idea to purchase 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 missing keys aren't in the process of trying to steal the car.
Replacement Case
Saab owners usually have only one car key, and if that is lost, they'll be charged. It's costly to add keys and will require replacing the CIM or TWICE in the case of older models. In the event of theft or any other disaster, it is best to have an extra key. Even it's "new", it won't work.
Most locksmiths can't help you with a single working key, and the dealer will charge high prices to replace the computer in your car to make a replacement. However, we can reset and reprogram the computer's EEPROM to prepare it to accept the new key, without replacing the entire system. That can save you a lot of money. It's less expensive instead of waiting until you lose the only key.