Saab Key Programming
Saab cars made from 1994 have an immobilizer system based on coded keys. A new transponder is required to allow the inclusion of an additional key, and special programming. This is usually done by the dealer with a specialized Tech2 diagnostic tool.
The problem is that this could be very costly. This is why you should always have a spare key available.
Transponder key
The transponder is a type of key that is equipped with an electronic chip. This chip sends a signal when the key is inserted 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 be able to unlock itself and begin. This is a great way to prevent auto theft and keep your vehicle secure from thieves.
Transponder keys are a common feature in vehicles, but you should be aware they're not as secure as traditional metal keys. The metal component of the traditional key can be easily cut and copied, however the transponder is protected by an electronic chip that protects it. The chip is equipped with an individual code that is programmed into the car's computer to identify it.
When a Saab key fob is used the car recognizes it and allows it to turn on. The car can only recognize the key fob if the device has an unmodified chip and programmed to match. The car will not start when the key isn't programmed to match.
It is essential to ensure that you have a spare key for your Saab. This is especially true when you live in a rural location that has numerous car thieves. You can obtain a replacement key for your Saab by going to the dealership and not paying their expensive costs. You can have the replacement key on the spot for less than half the cost you would pay at an auto dealer.
Wired key
Saab cars are usually delivered with two keys. If you only have one, you need to purchase an additional key as fast as you can. This is because, if it's lost, the car will need an entirely new CIM and the locking cylinders replaced. This can be costly especially if purchasing a used car.
The next step is connecting the row and columns wires to your microcontroller. This is the most challenging part of the project and will require a large amount of soldering. There isn't a standard method to do it, but you must plan how to route and connect each column and row. 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 rows and column are joined, it is time to connect the key switches. Solder a diode to each key switch pin. This will shield the pins on the key switch from current and prevent them from being shorted. A diode lets current 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 some of the tools available in auto parts stores, such as the Autel MaxiIM IMM608PRO and IM508 can assist customers shopping or DIY users to program replacement keys and restore data from the immobilizer. The tools plug into OBD ports and guide the user through each step which makes the process much easier than replacing the car's computer.
Jumpstarting the battery
Most people keep a few sets of jumper cables in their trunks for emergencies, but jumping a battery on newer cars might not be the best choice. They have numerous digital and electronic devices that communicate with each other. A surge in voltage when a battery is hooked up to another can fry these 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 have "POS" or "+" on it). Attach the other end of the black cable to an unpainted, clean metal surface underneath the car's hood. The engine block would be a good choice. Don't connect the black cable to the negative terminal of the dead battery as this could cause an ignition spark that ignites the gasoline in the engine bay.
Once the cables are connected, start the vehicle that has been disabled and let it run for about five minutes before you disconnect them in reverse order. The battery in the Saab 9-3 will charge as you drive. It will take some time for it to recharge again. It's a good idea buy a spare key fob as soon as you can, because replacing the sole 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
Many Saab owners have only one key for their vehicle and if they lose that key, it will cost them. saab 9-3 key to buy the key and also requires replacing the CIM or TWICE for older models. It's best to have a backup key in the event of theft or any other catastrophe and the most effective way is to buy an extra key as soon as you can. Don't buy a secondhand key even the case that it's "new." Keys that are claimed to be new from aftermarket sellers will not perform and are almost certain to fail at the crucial moment.
Most locksmiths can't help you when you only have one working key and the dealer will charge you for the cost of replacing the computer in your car for a replacement. We can reset and reprogram the computer's EEEPROM in order to be able to accept a new key without replacing the entire system. That can help you save money. It's also cheaper than waiting until you lose your only key.