Saab Key Programming
Saab cars made since 1994 use an immobilizer system based on coded keys. To add an additional key, you need a new transponder, as well as special programming. This is usually done at the dealer using a Tech2 diagnostic tool.
The issue is that this could be extremely expensive. This is why it is important to always have a spare key on hand.
Transponder key
The transponder keys are keys with an electronic chip that sends a signal back to the car when it is inserted into ignition. The car is able to check whether the signal is the same as the one on the key. If the signals are the same, the car will unlock itself and start. This is a great method to deter auto theft and keep your vehicle secure from thieves.
Transponder keys are a common feature in automobiles, but you must be aware that they're not as secure as classic metal keys. The metal part of the traditional key can easily be cut or copied, while transponders are protected by an electronic chip that guards it. The chip has a unique 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 is only able to do so if the key fob has a non-modified chip that has been programmed to match it. If not, the car will reject the key and refuse to start.
It is important to have a spare Saab key. This is particularly true if you reside in a rural region that has many car thieves. You can purchase a new key for your Saab by going to the dealership without paying their high cost. In most cases, you can have an original key made on the spot at a fraction of the cost of what you would pay at the dealer.
Wired key
Saab cars are typically delivered with two keys. If you have only one, you should purchase an additional key as soon as you can. This is because, if it's lost, the car will need an entirely new CIM and the locking cylinders replaced. This could be expensive particularly if you are purchasing a used vehicle.
The next step is connecting the row and columns wires to your microcontroller. This is the most tedious part of the project, and it will require a lot of soldering. There's no standard way to do this, but it is important to think about the route you'll take and solder the rows and columns. There are 22 microcontroller wires as well as pins to connect for this keyboard. It includes 5 rows and 17 columns.
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 pin on the key switch and solder it. This will protect the pins on the key switch from current and stop them from being shorted. The diode will only allow the flow of current to be in one direction, and it has an indicator in black that shows the direction in which current will flow.
Sanabria says that some of the tools that are sold in auto parts stores, including the Autel MaxiIM IM608PRO and the IM508 will assist shoppers or DIY users to program replacement keys and restore immobilizer data. The tools plug into the OBD port and automatically guide the user through the process, making it easier than replacing the computer inside the vehicle.
Jump-starting the battery
A lot of people keep an assortment of tools in their trunk to jump-start a car in case of emergency, but it may not be the best idea for cars with more modern technology. These vehicles are equipped with numerous digital and computers that communicate with each other. A surge of voltage when a battery is connected to another one could cause damage to the parts making your car unusable.
Connect the cables to the vehicle that is operating. Allow it to run for two minutes. Attach the red clip to the positive terminal on the good battery (it will have "POS" or "+" on it). Attach the other end to a clean unpainted metal surface beneath the hood of the disabled car. The engine block is a good option. Do not connect the black cable to the negative terminal on the dead battery, as this could cause an ignition source that ignites gasoline in the engine bay.
Once the cables are connected, you can start the vehicle that is disabled and let it run for about five minutes before you disconnect them in reverse order. The battery in your Saab 9-3 is recharged as you drive. It will take a while for it to drop back down. 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 a special program to convince it that your missing keys aren't attempting to steal the car.
Replacement case
Saab owners usually only have one car key, and if it is lost, they will be charged. The reason is that it's not inexpensive to buy a new key, and it requires replacing the CIM (Column Integration Module) or TWICE on older models, and programming. It is recommended to have a spare key in case of theft or other disaster and the most effective way is to purchase an additional key as quickly as you can. Don't purchase a used key even if it's "new." Keys that are claimed as new purchased from third-party sellers won't work and are likely to fail in the most critical moment.
The dealer will charge you the most expensive dollar if you only have one working key. lost saab keys can reset and reprogram the computer's EEEPROM in order to make it ready to accept a new key without replacing the entire system. This can help you save a significant amount of money. It's also cheaper than waiting until you lose your one key.