Saab cars produced since 1994 use an immobilizer system that is based 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 specially-designed Tech2 diagnostic tool.
This can be expensive. It is recommended to always have a spare set of keys on hand.
Transponder key
The transponder key is a key equipped with an electronic chip. It transmits a signal to the car when it is inserted into ignition. The car then analyzes the signal to see if it matches the one that is in the key. If the signals are the same the car will then unlock itself and start. This is a great method to prevent car theft and keep your car secure from thieves.
Transponder keys are an extremely popular accessory for cars, but they are not as safe as traditional keys made of metal. The metal portion of a traditional key is easily cut or copied, while a transponder has an electronic chip that safeguards it. The chip has a unique code that is programmed into the car's computers to identify it.
The car will recognize the Saab keyfob and allow it to turn on. The car will only recognize the key fob if the device has a chip that is unmodified and programmed to match. Otherwise, the car would refuse to accept the key and will not start.
It's important to make sure that you have an extra key for your Saab. This is particularly true if you reside in a rural area that is home to numerous car thieves. You can obtain a replacement key for your Saab by visiting the dealership without paying expensive costs. You can get a replacement key made on the spot for less than half of what you would pay at dealerships.
Wired key
Saab cars are usually delivered with two keys. If you only own one, you should get an additional key as soon as you can. This is because if it's lost the car will require a new CIM and the locking cylinders replaced. This can be costly especially for cars that are used.
The next step is connecting the wires for columns and row to your microcontroller. This is the most challenging part of the project and will require a good deal of soldering. There is no standard method to accomplish this, however it is essential to determine how you will route 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 that you need to connect.
After the columns and rows are joined after which it is time to connect the key switches. Solder a diode to each key switch pin. This will shield the pins from current, preventing them from being shortened. A diode allows current to only flow in only one direction. It features a visual indicator that is black, that indicates which direction current will flow.
Sanabria says that a few of the tools that are sold in auto parts stores, including the Autel MaxiIM IMM608PRO and IM508 will assist shoppers or DIY customers to program replacement keys and restore immobilizer information. The tools connect to 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 trunks for emergency situations however, jumping a battery on newer cars might not be the best choice. These vehicles are equipped with numerous electronic devices and computers that communicate with one another. A surge in voltage while the battery is connected to another one could damage the components and render your vehicle undriveable.
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 saab key fob replacement of the black cable to an unpainted, clean metal surface under the disabled car's hood--the engine block is an ideal choice. Do not connect the black cable to the negative terminal of the dead battery, as it could spark an ignition source that ignites gasoline in the engine bay.
Once the cables are connected, you can start the vehicle you are not using and let it run for approximately five minutes before you disconnect them in reverse order. Keep in mind that the battery on your Saab 9-3 is charged when you drive, so it can take a while to get the battery back to its original level. It's a good idea to invest in 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 lost keys aren't attempting to steal the car.
Replacement Case
Many Saab owners have only one key for their car and if they lose that key, it will cost them. It's expensive to purchase an additional key and it requires replacing the CIM or TWICE in the case of older models. It's recommended to have a second key in the event of theft or other disaster, and the best way is to purchase a second key as soon as you are able to. Even even if the key is "new" it won't work.
The dealer will charge you top dollars if you only have one working key. We can reset and reprogram the computer's EEEPROM in order to get it ready to accept a new key without replacing the entire system. This could save you lots of money. It's also less expensive than waiting until you lose your only key.
