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How to Programming a BMW Key Fob It's vital that mechanics and locksmiths remain up-to-date with the latest technology in automotive. This includes key duplication and programming. This will help them handle complex issues such as BMW key fob programing. Start by putting the working key into the ignition and turning the key to position 1. The dash and accessories lights should come on. What is an EEPROM? The EEPROM is an inert memory chip that can be erased and changed. It can be used to store various things, including serial numbers and other unique information, in almost every device that is connected to Ethernet. It is the chip used in printers and charge cards and blood sugar monitors. It is also used to store data sequences that control microcontrollers' operations and also to offer a method of recovering from power-on reset situations. The basic EEPROM chip is comprised of two field effect transistors. One is a floating gate, and the other is a control gate. When the device is powered up, electrons are released and may be held in a 0 or a 1 state based on the voltage applied. The EEPROM can be read by monitoring the state of these transistors. When the EEPROM is in the “0” state, it has no value. When the EEPROM is in the “1” state, it has a value of one. In between these two states, no data is stored, however it can still be written. EEPROMs can be erased by the short duration of the voltage that is applied to the gate. The advantage of the EEPROM is that it can be written to and erased without the need for external circuitry. This makes EEPROMs very useful for systems that require frequent memory updates, such as remote keyless systems microcontrollers. There are different kinds of memory chips that offer similar functions, but are more suitable for long-term storage. Modern flash memory chips, for example, are very popular and can be found in digital cameras. These are often used to store multimedia files intended for both short-term and long-term storage and retrieval. But they aren't EEPROMs and their fundamental functions differ from the ones of true EEPROMs. However, EEPROMs continue to be used extensively due to their versatility and ability to store tiny quantities of data in a restricted space. What is OBDII? Up until recently, most car manufacturers relied on their own diagnostic systems to identify vehicle problems. In 1996, the government mandated that all vehicles use a standard system for reading diagnostic code. This new system, which is called OBD-II is based on the same port and diagnostic code system across all models and makes of vehicles sold in the US. This means that any mechanic is able to quickly diagnose a problem with your vehicle by plugging it into the tool that is specifically designed for. The OBD-II system can detect a variety of issues in the engine and other parts of the vehicle by using the standard diagnostic connector. The information is saved in the computer of the car for later analysis. The system is then able to identify and fix any issues before creating significant damage. The mechanic can connect an OBD-II scan tool to the port, which will display the error codes and inform where they originated. Scan tools have more computing power than code readers and are able to read more types of error codes. They can also display live data graphs and record data to be later analyzed. Some tools are capable performing more complex functions like changing the code of an ECU or providing options to improve performance. These high-end tools are usually utilized by skilled automotive technicians and are more expensive than standard code scanners. When connecting a scan tool to the OBD II port, it will automatically recognize what protocol it is using, and communicate with the vehicle using the correct pins. There are numerous protocols. The most common include SAE J1850 (KWP2000) that is used by Ford and certain GM vehicles ISO 14230-4, which is used in a variety of European and Asian vehicles and CAN. Some scan tools can tell you what the code signifies. Others will give you the code, and you'll need to do some internet research to find out what it means. What is a CAS unit? The CAS module is a BMW module that manages the antitheft system of the car. The system works by reading an encoded signal from the fob of the key and verifying it with the CAS module. If the signal is valid the CAS module will send an enable signal to the engine control unit. If not, the engine won't start. A BMW CAS module malfunction can result in a variety signs, including key fobs that aren't working and alarm activation issues, central locking issues, and warning lights on the dashboard. If you notice any of these symptoms, make sure you have the CAS Module inspected immediately by an expert. The CAS system communicates with vehicle's engine and other systems by using the BMW ICOM VCDS. bmw spare key cost G28 Car Keys is connected to the CAS using an extra cable that has a DIN connector on the other end. The VCDS has several functions that include showing error codes and changing the timing of the ignition. It also offers a variety of security features that protect the vehicle from theft. In addition to the ICOM VCDS, BMW vehicles come with a CAS module that is integrated into the key. The module is powered by the ignition coil, and is not designed to work with batteries. A transponder chip is integrated in the key to transmit the coded signal to the CAS module. This is transmitted via an antenna coil (loop) at the ignition lock. The CAS state logic is implemented by the CasSystem class. You must create one instance of this class on each instrument that needs to receive information from CAS. Making multiple instances of this class could cause undesirable behavior. In addition to providing information about state and information about state, the CasSystem class also manages the display of alert messages. To do this it creates a cas_activate_alert topic that requires event data in the form of an object with the key and priority properties. This topic contains the ID and, optionally, the suffix of the alert you want to activate, as well as its priority level. Once you've activated an alert, the CasSystem will display an alert message on the cas_alert_displayed as well as the cas_alert 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 the BMW Key BMW offers drivers in the Murrieta area keyless entry, an easy feature that allows you to lock and unlock your car without the need for keys that are physically present. This keyless entry system only activated after the key fob has been programmed to the car. To accomplish this, you'll need follow a few simple steps. The process is slightly different dependent on whether you're pairing a new BMW key fob to your existing BMW or starting from scratch with no working BMW key. First, you must put the working key fob into your vehicle, along with the one you wish to program. Make sure all the windows and doors are shut. Insert the working key into the ignition, turning it to the first position and return it quickly five times (do not start the engine). Turn the key back and remove it. With the key fob still in your pocket hold the unlock button while you press the lock button (the BMW logo) three times quickly. Release the unlock button and the door locks will lock and unlock themselves. Repeat this process for each additional key fob you want to program. Connecting your smartphone to your vehicle using Bluetooth is the final step. Launch the BMW Connected app and log in. The BMW Digital Key setup button will appear. This will activate the key on your smartphone and allow you to use it in conjunction with the Digital Wallet app. After you've completed these steps, the BMW key fobs are now ready to be used by other members of your family and your friends during their Corona commutes. For drivers who need help, our service department is always ready to offer more advice and tricks to ensure the most successful BMW experience! Change the battery in the battery of your BMW key fob is yet another task you might need to complete at times. It's a simple process that you can accomplish at home. To change the battery all you have to do is take off the cover for your key fob and then carefully take off the old battery, and then replace it with a new CR2032. This will give you back your keys and have you back on the road again in the shortest amount of time!