Saab Key Programming
Saab cars manufactured since 1994 have an immobilizer feature that is based on codes for keys. The addition of a key requires the purchase of a new transponder as well as special programming. This is usually done at the dealer using a special Tech2 diagnostic tool.
It can be costly. This is the reason why you should always keep a spare key in your possession.
Transponder key
The transponder can be described as a key that is equipped with an electronic chip. saab 9-3 replacement key sends a signal when the key is put in the ignition. The car checks to see whether the signal is the same as the one on the key. If the signals are identical the car will then unlock itself and begin. This is a great method to prevent auto theft and keep your vehicle safe from thieves.
Transponder keys are an extremely popular accessory for automobiles, but they are not as safe as traditional metal keys. The metal component of a traditional key can easily be cut and copied, however the transponder is protected by an electronic chip that guards it. This chip contains an unique code that is programmed into the car's computer in order to identify it.
The car will recognize the Saab keyfob and allow it to be turned on. However, it will only do this if your key fob is unmodified and has a chip that has been programmed to match. The car won't start when the key isn't programmed to match.
It is important to have an extra Saab key. This is particularly important especially if you live in a rural location that has numerous car thieves. The good news is that it's possible to obtain a replacement key for your Saab without needing to visit an auto dealership and pay the hefty prices that they demand. You can get a replacement key created on the spot at a fraction of what you would spend at a dealership.
Wired key
Saab cars typically come with two keys when new. If you have only one, it is recommended to purchase an additional key fob as quickly as you can, because if you lose it the car will require a new CIM unit and the locking cylinders will need to be replaced. This could be expensive especially if you're purchasing a used vehicle.
The next step is to connect the row and columns wires to your microcontroller. This is the toughest part of the project, and it will require a lot of soldering. It's not a standard way to do it, but you should plan how to route and solder each column and row. For this keyboard, there are 5 rows and 17 columns. So there will be 22 microcontroller pins and wires to connect.
After the columns and rows are joined It is now time to connect the key switches. To do this, place an inverter over each pin of the key switch and solder it. This will shield the pins from current, preventing them from getting shorted. The diode allows current to only flow in one direction. It is equipped with a visible indicator with a black band that indicates the direction in which current will flow.
Sanabria says that a few of the tools sold in auto parts stores, like the Autel MaxiIM IM608PRO and the IM508 will assist customers shopping or DIY customers to program replacement keys and restore data from the immobilizer. The tools plug into the OBD port and guide the customer through the process, making it more simple than replacing the computer inside the vehicle.
Jump-starting the battery
Most people keep a few sets of jumper cables in their trunk in case of emergency however, jumping a battery on newer vehicles might not be the best option. These vehicles are equipped with a number of digital and electronic devices that communicate with one another. A voltage surge when the battery is connected to another can fry the components, rendering your car undriveable.
Start the working vehicle and allow it to run for approximately two minutes before you connect the cables to the battery that is not working. 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 clean and unpainted metal surface underneath the hood of your disabled vehicle. The engine block is a great alternative. Don't connect the black cable to the negative terminal on the dead battery, since this could cause an ignition source that ignites gasoline in the engine bay.
Once the cables are connected, you can start the vehicle that has been disabled and allow it to run for around five minutes before disconnecting the cables in reverse order. The battery in your Saab 9-3 will recharge while you drive. It takes a while for it to return to its original state. You should purchase another key fob as soon as you can. Replacing the only one that works requires the installation and programming of a brand new computer chip.
Replacement Case
Saab owners usually have only one car key, and if that is lost, they'll be charged. The reason for this is that it's costly to buy a new key, and it requires replacing the CIM (Column Integration Module) or TWICE on older models, and programming. It's best to have a backup key in case of theft or any other catastrophe and the most effective way is to buy an extra key as soon as you are able to. However, don't purchase a secondhand key, even it's "new." Keys that are claimed to be new from aftermarket sellers will not work and are likely to fail in the crucial moment.
The dealer will charge you the highest dollar for only one working key. However, we can reset and re-program the computer's EEPROM to accept the new key without having to replace the entire system. That can save you a significant amount of money. It's cheaper to do this rather than wait until you lose the sole key.