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How to Programming a BMW Key Fob In the constantly evolving technological world of automotive technology it is crucial for mechanics and locksmiths to be educated about key programming and duplicate. This will help them tackle difficult problems like BMW key fob programming. To program a new key start by inserting the working key into the ignition and then turning it to position 1. The dash and accessory lights should come on. What is EEPROM? The EEPROM is a non-volatile memory chip that can be erased and programmed. It is used to store a number of things, such as the serial numbers as well as other unique information in virtually everything connected to Ethernet as well as the chip in printers, charge cards, and even blood glucose monitors. It can also be used to store data sequences that regulate the operation of microcontrollers and to provide a means of recovering from resets caused by power-on conditions. The basic EEPROM chip has two field effect transistors. One has what is called a floating gate, and the other is a control gate. When the device is turned on, electrons are released and are trapped in a 0 or a state of 1 based on the voltage applied. This transistor state can be used to read the EEPROM. If the EEPROM state is “0” is the state, it is in no use. When the EEPROM state is “1” it has a 1 value. In between these states, there is no stored data, but it can be written to. EEPROMs are erased with the short duration of the voltage that is applied to the gate. The benefit of EEPROM is that it can be written to and erased without any external circuitry. This makes it very useful in systems where memory must be updated frequently like remote keyless microcontrollers for remote systems. However there are different memory chip types that offer similar functionality, and are better suited for long-term storage and retrieval of large files. Modern flash memory chips, for example, are very popular and are found in digital cameras. These are used to store multimedia files for both long-term storage and retrieval. Nevertheless, they are not considered to be true EEPROMs as their core functions are different from the functions of real EEPROMs. EEPROMs are still widely utilized, however, because of their versatility and ability to store a minimal amount of data in a small space. What is OBDII? Prior to recently, the majority of automobile manufacturers had their own diagnostic systems to identify car problems. In 1996, the government ordered that all vehicles utilize a standard system to read diagnostic codes. The new system, called OBD-II uses the same diagnostic code and port system for all brands and models sold in the US. This means that any mechanic can easily diagnose a problem in your vehicle by plugging in the tool that is specifically designed for. The OBD-II system detects a range of faults in the engine and other parts of the vehicle by using an ordinary diagnostic connector. The information is stored in the car's computer for later analysis. The system is able to detect and repair any faults before damaging the car in a significant way. The mechanic can connect an OBD-II scan tool to the port and it will display error codes and inform where they came from. Scanners have more computing capacity than code-readers and can read a wider range of error codes. They can also show live data graphs and save data for later analysis. Some tools are able to perform more advanced functions such as reprogramming the ECU and supplying performance-enhancing options. These tools are employed by auto technicians who are professionals and are usually more expensive than scanners that are merely scanning. When you connect a scanner tool to an OBD II connector, it will recognize the protocol and communicate with the vehicle using the correct pins. There are a variety of protocols. The most popular are SAE J1850 (KWP2000) which is used by Ford and certain GM automobiles ISO 14230-4, utilized in various European and Asian vehicles and CAN. Some scan tools tell you what the code signifies. Others will provide the code, and you'll have to conduct some online research to determine what it means. What is CAS Unit? The CAS module is a BMW module that controls the antitheft system of the car. The system works by reading an encoded signal from the fob of the key and then verifying it using the CAS module. The CAS module will send an enable signal to the engine control unit if the signal is valid. If the signal is not valid the engine will not begin. A BMW CAS module failure can lead to a variety of symptoms, including key fob not working problems or alarm activation issues. Other symptoms include central locking issues and warning lights appearing on the dashboard. If you notice any of these symptoms, you should have the CAS Module examined as soon as possible by a professional. The CAS system uses the BMW ICOM VCDS to communicate with the engine and other vehicle systems. The VCDS is connected to the CAS using a special cable with a DIN connector at the end. The VCDS can perform a variety of functions, including display of error codes, as well as adjusting the ignition timing. It also comes with a range of security features that protect the vehicle from theft. BMW automobiles come with the CAS key module addition to the ICOM VCDS. The CAS module is powered by the ignition coil, and is not designed to run on batteries. A transponder chip is embedded inside the key to transmit the encoded signal to the CAS module. This signal is transmitted using an antenna coil (loop) at the ignition lock. The CAS state logic is implemented by the CasSystem class. You should create one instance of this class for each device that requires information from the CAS. Making multiple instances of this class could cause undesirable behavior. In addition to providing information about state in addition, the CasSystem class also handles the display of alert messages. In order to do this, it publishes a cas_activate_alert topic that needs event data in the form of an object with the key and priority properties. This topic specifies both the ID of the alert you wish to activate and the priority level. Once you've activated the alert and the CasSystem will display 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 I program a BMW Key BMW offers keyless entry for those living in the Murrieta region. This convenient feature allows you to lock and unlock your vehicle without using a physical key. The keyless entry system can only activated after the key fob is programmed to the car. You'll need to follow a couple of simple steps. bmw mini key replacement G28 varies slightly based on whether you want to connect a new key fob to an existing BMW or you are beginning from scratch and don't have a functioning key. The first step is to remove the key fob that is working and the ones you'd like to program inside your vehicle, making sure that all windows and doors are closed. Insert the working key in the ignition and turn it five times to position 1. then back. Don't start the vehicle. Remove the key by turning it backwards. With the key fob still in your pocket hold the unlock button as you press the lock button (the BMW logo) three times fast. Release the unlock button, and the door locks will unlock and lock themselves. Repeat this process to program each additional key fob. Connecting your smartphone to your car using Bluetooth is the last step. Launch the BMW Connected app and log in. The BMW Digital Key setup button will be displayed. This will enable you to use the key through the Digital Wallet App. Once you've completed the steps, you'll be able to ensure that your BMW key fobs are ready to be used by other members of your family as well as acquaintances on their Corona commutes. Our service department is eager to provide more advice and tricks to help you get the most out of your BMW driving experience. You may also need to replace the battery on your BMW's key fob. This is a simple job that you can accomplish at home. To change the battery you just need to take off the key fob, carefully remove the older battery and replace it with the new CR2032. The keys will be back and on the road in the blink of an eye.