Saab Key Programming
Saab cars made from 1994 have an immobilizer system that relies on coded keys. The addition of a key requires a new transponder, as well as special programming. This is usually handled by the dealer using a Tech2 diagnostic tool.
The problem is that this could be quite costly. This is why you should always keep a spare key in your possession.
Transponder key
The transponder is a piece of key that has an electronic chip. This chip sends out a signal when the key is placed in the ignition. The car will then check the signal to determine if it matches the one on the key. If the signals are identical the car will then unlock itself and begin. This is a great way to prevent auto theft and keep your vehicle secure from thieves.
Transponder keys are a favored feature in cars, but it is important to know that they aren't as secure as traditional metal keys. The metal portion of a traditional key can easily be cut and copied, whereas a transponder has an electronic chip that safeguards 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. However, it will only do this if your key fob is unmodified and has a chip that has been programmed to match the original. Otherwise, the car will refuse to accept the key and will not start.
It's important to make sure that you have a spare key for your Saab. This is especially true if you live in a rural area where there are a lot of car burglars. The good thing is that you can get a replacement key for your Saab without having to go to an auto dealer and pay the hefty prices that they ask. In most cases, you can have a new key made on-the-spot for less than half the cost of what you'd pay at an auto dealer.
Key for Wired
Saab cars are usually delivered with two keys. If you only have one, you need to purchase an additional key as quickly as you can. This is because if you lose it and the car needs a new CIM and the locking cylinders replaced. This can be expensive, especially for used cars.
The next step is to connect the wires for columns and rows to your microcontroller. This is the toughest part of the project and it will require lots of soldering. There isn't a standard method to go about it, but you should plan how to connect and solder each column and row. There are 22 microcontroller wires and pins that you can connect to this keyboard. It has five rows and 17 column.
After the columns and rows are soldered, it's the time to connect them to key switches. To do this, put a diode over each pin of the key switch and solder it. This will shield the pins on the key switch from current and prevent them from being shorted. A diode permits current to only flow in one direction. It features a visual indicator, a black band, that indicates which direction current will flow.
Sanabria says that a few of the tools offered 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 the immobilizer's data. The tools connect to OBD ports and guide the customer through each step making the process simpler than replacing the vehicle's computer.
Jump-starting the battery
The majority of people have a set of jumper cables in their trunk to use in an emergency however, jumping a battery for newer vehicles might not be the best choice. saab keys replacement are equipped with many computers and digital devices which communicate with one another. A voltage surge when batteries are connected to another can fry the components making your car inoperable.
Connect the cables to the vehicle working. Let it run for two minutes. Attach the red clip on the positive terminal of the good battery. (It will say "POS" or "+".) Attach the other end to a clean and unpainted metal surface underneath the hood of the damaged car. The engine block is a great choice. Do not connect the black cable to the negative terminal of the dead battery as it could ignite an ignition source that ignites gasoline in the engine bay.
Once the cables are connected, turn on the vehicle you are not using and let it run for about five minutes before you disconnect the cables in reverse order. The battery in your Saab 9-3 is recharged while you drive. It takes a while for it to recharge again. It is a good idea to invest in a spare key fob as soon as you can, because replacing the sole working one requires the installation of a brand new computer module and a special program to convince it that your missing keys aren't in the process of trying to steal the car.
Replacement case
Saab owners usually only have one car key, and if that is lost, they'll be charged. It's expensive to add a key and requires replacing the CIM or TWICE for older models. In the event of theft, or any other calamity it is best to have a spare key. Even even if the key is "new" it won't work.
The majority of locksmiths won't be able to help with a single working key, and the dealer will charge for the cost of replacing the computer in your vehicle to make a replacement. We can, however, reset and re-program the computer's EEPROM to prepare it to accept the new key without having to replace the entire system. This can save you a significant amount of money. It's cheaper to do this than wait until you lose the only key.