Saab Key Programming
Saab cars made since 1994 use an immobilizer system based on keys that are coded. In order to add a second key, it requires a new transponder, as well as special programming. This is usually done at the dealer using a special Tech2 diagnostic tool.
The issue is that this can be quite costly. This is why you should always have a spare key available.
Transponder key
The transponder can be described as a key equipped with an electronic chip. This chip sends a signal when the key is inserted in the ignition. The car then analyzes the signal to see if it matches that of the key. If the signals match it will unlock and begin. This is a great method to deter auto theft and keep your car secure from thieves.
Transponder keys are a common feature in cars, but it is important to know that they're not as secure as traditional metal keys. While the metal component of a traditional key can be cut and copied however, a transponder is secured by an electronic chip. The chip is a unique code which is programmed into a car's computers in order to identify it.
When a Saab key fob is used the car recognizes it and allows it to turn on. The car will only recognize the key fob if the device has an unmodified chip and has been programmed to match. Otherwise, the car would refuse to accept the key and will not start.
It's essential to ensure that you have an extra key for your Saab. This is particularly important when you live in a rural region that has numerous car thieves. You can obtain a replacement key for your Saab by going to the dealership without paying high costs. In the majority of instances, you can get a new key created on-the-spot for less than half the cost of what you'd pay at the dealer.
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Saab cars usually come with two keys upon purchase. If you have only one, it is recommended to get 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 can be costly, especially if you are purchasing a used vehicle.
The next step is to connect the column and row wires to the microcontroller. This is the most difficult part of the project and requires a significant amount of soldering. It's not a common way to do it, however, you should think about how to connect and solder each column and row. There are 22 microcontroller pins and wires to connect for this keyboard. It includes 5 rows and 17 columns.
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 across each pin on the key switch and then solder it. This will protect the pins from current, preventing them from being cut off. A diode can only allow current to flow in one direction, and it also has a a black band visual indicator that indicates the direction in which current will flow.
Some of the tools offered at auto parts storeslike the Autel MaxiIM IM608 Pro and IM508 -- could help shop customers or even DIY customers in some cases programme replacement keys and recover lost immobilizer data, Sanabria says. The tools plug into OBD ports and guide the customer through each step and make the process more straightforward than replacing the vehicle's computer.
Jump-starting the battery
A lot of people keep a set of jumper cables in their trunk in case of emergency, but jumping a battery in newer cars might not be the best choice. These cars have a variety of electronic devices and computers that communicate with one another. A voltage spike when a battery is hooked up to another one could damage the components and render your car unable to drive.
Start the vehicle you are using and allow it to run for approximately two minutes before connecting the cables to the disabled one. Attach the red clip to the positive terminal of the battery that is good (it will have "POS" or "+" on it). Attach the other end of the black cable to an unpainted, clean metal surface under the disabled vehicle's hood. An engine block is a good choice. Don't 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 should start the vehicle and let it run for about five minutes. Then, disconnect them in reverse. The battery in the Saab 9-3 will charge while you drive. It will take some time for it to return to its original state. It's a good idea to purchase a spare 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 lost keys are not trying to steal the car.
Replacement Case
Many Saab owners only have one key for their vehicle and if they lose it, they'll be charged. It's costly to add a key and requires replacing the CIM or TWICE in the case of older models. It's best to have a spare key in case of theft or any other catastrophe and the most effective way is to purchase a second key as early as you can. Don't purchase a used key even if it's "new." Claimed-new keys from a second-hand store will not work and are almost guaranteed to fail in the crucial moment.
The dealer will charge you top dollars if you only have one working key. We can reset and reprogram the computer's EEEPROM to make it ready to accept a replacement key without the need to replace the entire system. That can save you a lot of money. It's more affordable rather than wait until you lose the sole key.