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How to Programming a BMW Key FobIn the ever-evolving world of automotive technology it is crucial for mechanics and locksmiths to keep up-to-date with key programming and duplication. This will help them to deal with complex issues like BMW key fob programming.Begin by putting your working key in the ignition and then turning the key to position 1. The dash and accessory lights should turn on.What is an EEPROM?The EEPROM is an inert memory chip that can be erased and programmed. It can be used to store a variety of things, like serial numbers and other unique information in virtually every device connected to Ethernet. It is also the chip used in printers, charge cards, and even blood sugar monitors. It can be used to store information that controls the operation of microcontrollers as well as a method to recover from power-on reset situations.The fundamental EEPROM chip is comprised of two field effect transistors. The floating gate is located on one side, while the control gate is on the other. When the device is powered up the electrons are released and are trapped in a 0 or a 1 state based on the voltage applied. This transistor state can be used to read the EEPROM.If the EEPROM is in the “0” state there is no value. When the EEPROM is in the “1” state it has a value of one. In between these states, there is no stored data, however it is able to be written to. The EEPROM can also be erased by applying a certain voltage to the gate for a short period of time.The benefit of EEPROM is that it can be erased and written to without the need for any external circuitry. This makes EEPROMs extremely useful for systems which require frequent memory updates, such as remote microcontrollers that do not require keys. However there are other memory chip models that provide similar functionality and are better suited for long-term storage and retrieval of large files.Modern flash memory chips are popular in computers and digital cameras. They are used to store multimedia files for long-term storage and retrieval. However, they’re not considered to be EEPROMs and their primary functions are different from those of genuine EEPROMs. They are still used, however, because of their versatility and the ability to store a small amount of data in a tiny space.What is OBDII?Up until recently, most automobile manufacturers had their own diagnostic systems for diagnosing vehicle problems. In 1996, the government ordered that all cars use a standard system for reading diagnostic codes. This new system, called OBD-II, uses the same port and diagnostic code system for all models and makes of automobiles that are sold in the US. This means that any mechanic is able to easily diagnose a problem in your vehicle by plugging in the special tool.The OBD-II system can detect a variety of errors in the engine as well as other parts of the vehicle by using the standard diagnostic connector. The information is stored in the computer of the car to be later analyzed. The system is then able to identify and repair faults prior to creating significant damage. Mechanics can then connect to the OBD-II port with a scan tool, which will show the error codes in all their entirety and indicate what part of the system they come from.Scanners have a greater computing capacity than code-readers and are able to read a greater variety of error codes. They can also show live data graphs and save data for later analysis. G28 are capable of performing more complex functions such as reprogramming an ECU or providing performance-enhancing options. These tools are usually used by professional automotive technicians and are more expensive than basic code scanners.When connecting a scan tool to the OBD II port, it will detect the protocol it is using, and communicate with the vehicle using the appropriate pins. There are many different protocols however the most well-known ones are SAE J1850 PWM that is used in Ford and some GM vehicles, ISO 14230-4 (KWP2000) that is used in a number of European or Asian vehicles, and CAN, which is found in the majority of American-made vehicles. Certain scan tools will tell you exactly what the code signifies. Others will just give you the code, and you’ll need to do some internet research to figure out what it means.What is a CAS unit?The CAS module is a BMW module that manages the car’s antitheft mechanism. The system works by reading an encoded signal from the key fob and confirming it with the CAS module. If the signal is valid the CAS module sends an enable signal to the engine control unit. If the signal is not valid the engine won’t begin.A BMW CAS module malfunction could cause a variety of signs, including key fobs not working and alarm activation issues, central locking issues and warning lights on the dashboard. If you experience any of these symptoms, you should have the CAS Module inspected immediately by an expert.The CAS system makes use of the BMW ICOM VCDS to communicate with the engine and other systems in the vehicle. The VCDS is connected to the CAS using a special cable with a DIN connector at the end. The VCDS is able to perform a variety of functions, including displaying error codes or altering the timing of the ignition. It also offers a variety of security features to guard the car from theft.BMW vehicles come with an CAS key module in addition to the ICOM VCDS. The CAS module is powered by the ignition coil, and is not designed to work with batteries. The key is encased with a transponder that transmits the coded signal. This signal is sent through an antenna loop (coil) at the lock for ignition.The CAS state logic is implemented in the CasSystem class. You should create one instance of this class on each instrument that requires information from CAS. Multiple instances of this class may result in unintended behavior. In addition to providing state information and information about state, the CasSystem class also manages the display of alert messages. In order to do this, it publishes a cas_activate_alert topic that requires event information in the form of an object that has the key and priority properties. This topic specifies the ID of the alert you wish to activate as well as its priority level. After you’ve activated an alert and the CasSystem will publish a message for it on the cas_alert_displayed and cas_alert_hidden event bus topics (defined by the CasEvents interface). It will also subscribe to the cas_master_warning_active and cas_master_caution_active topics to consume their statuses.How do you program a BMW keyBMW offers keyless entry for those living in the Murrieta region. This convenient feature allows you to lock and unlock your vehicle without using keys that are physically present. The keyless entry system can only activated once the key fob is programmed to the car. It’s only two simple steps.The process varies slightly depending on whether you’re looking to pair a new key fob to an existing BMW or you are starting from scratch and do not have a working key. The first step is to get the working key fob as well as the ones you’d like to program inside of your car, ensuring all doors and windows are shut. Insert the working key into the ignition, and turn it to position one and quickly returning five times (do not start the engine). Turn the key back and remove it.With the key fob still inside of your pocket, hold down the unlock button as you press the lock button (the BMW logo) three times fast. Then, release the unlock button and the door locks should lock and unlock automatically. Repeat this process to program each key fob.The last step is to connect your smartphone to your vehicle via Bluetooth. Log into the BMW Connected application. The BMW Digital Key setup button will appear. This will allow you to use the key using the Digital Wallet App.After you’ve completed these steps, the BMW key fobs can then be used by other members of your Corona family or by your friends. Our service department is eager to give you more tips and tricks to have a successful BMW driving experience.You may also need to replace the battery on your BMW’s key fob. Luckily, this is a fairly simple job that can be accomplished at home. To change the battery you only need to remove the key fob, carefully take off the battery that is old and replace it with the new CR2032. You’ll have your keys back and on the road in no time.