Saab Key Programming
Saab cars built from 1994 have an immobilizer that relies on a set of keys. The addition of a key requires an entirely new transponder and programming. This is usually done by the dealer using a Tech2 diagnostic tool.
The problem is that it can be quite costly. You should always keep an extra set of keys available.
Transponder key
The transponder is a type of key equipped with an electronic chip. The chip sends a signal when the key is placed in the ignition. The car then examines the signal to determine whether it matches the one on the key. If the signals are in sync the car will then unlock and begin. This is a great way to deter auto theft and keep your vehicle safe from thieves.
Transponder keys are an increasingly popular feature for cars, but they are not as secure as traditional keys made of metal. The metal portion of a traditional keys can be easily copied and cut, but transponders are protected by an electronic chip that protects it. This chip contains an unique code that is 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 so if the key fob is equipped with a chip that is not modified that has been programmed to match the original. The car won't start if the key is not programmed to match.
It is essential to have a spare Saab key. This is particularly important if you live in a rural region where there are a lot of car burglars. You can obtain a replacement key for your Saab by going to the dealership, without having to pay their expensive prices. You can have a replacement key made on the spot for less than half what you would pay at dealerships.
Key for Wired
Saab cars are usually delivered with two keys. If you only own one, you should purchase an extra 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 expensive particularly for used cars.
The next step is to connect the wires for columns and rows to your microcontroller. This is the toughest component of the project and will require a lot of soldering. There isn't a standard way to accomplish this, however it is crucial to plan the route you'll take and solder the columns and rows. For this keyboard, there are five rows and 17 columns, which means there will be 22 microcontroller wires and pins to connect.
After the columns and rows are soldered together after which it is time to connect the key switches. To do this, put an inverter over each key switch pin and solder it. 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 has a visual indicator of a black line that indicates the direction in which current will flow.
Sanabria says that some of the tools sold in auto parts stores, such as the Autel MaxiIM IM608PRO and IM508, can help customers shopping or DIY customers to program replacement keys and restore immobilizer information. The tools connect to the OBD port and guide the customer through the procedure, making it simpler than replacing the computer in the vehicle.
Jumpstarting the battery
Most people keep a set of jumper cables in their trunks for emergency situations however, jumping a battery on modern vehicles may not be the best option. These cars are equipped with a variety of digital and computers that communicate with each other. A surge in voltage when a battery is connected to another could cause damage to the components and render your vehicle unusable.
Connect the cables to the vehicle that is working. Let replacement saab 9-3 key 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 clean unpainted metal surface underneath the hood of the affected car. The engine block is a good alternative. Do not connect the black cable to the negative terminal of the dead battery, as it could ignite an ignition that ignites the gasoline in the engine bay.
Once the cables are connected the vehicle that has been disabled and let it run for approximately five minutes before disconnecting the cables in reverse order. The battery in your Saab 9-3 is recharged while you drive. It will take a while for it to fall back. It's a good idea to invest in a spare key fob as soon as you can, since replacing the only functioning one requires the installation of a new computer module and a special program to convince it that the lost keys aren't in the process of trying to steal the car.
Replacement case
Saab owners usually only have one car key, and if it is lost, they'll be charged. The reason for this is that it's not cheap to purchase a new key, and that involves replacing the CIM (Column Integration Module) or TWICE on older models, as well as programming. In the event of theft, or any other disaster it is recommended to have an extra key. Even even if the key is "new", it will not function.
Most locksmiths cannot help you when you only have one working key, and the dealer will charge you top dollar to replace the computer in your car to make a replacement. We can, however, reset and reprogram the computer's EEPROM in order to prepare it to accept the new key, without replacing the whole system. This can help you save a significant amount of money. It's more affordable rather than wait until you lose your only key.