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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 automotive technology. key bmw includes key duplication and programming. This will enable them tackle difficult problems like BMW key fob programming. To program a new key start by inserting the working key into the ignition and turning it to position 1. The dash and accessory lights should come on. What is EEPROM? The EEPROM chip is a nonvolatile memory that can be erased or changed. It can be used to store various things, like serial numbers as well as unique data, in almost every device that is connected to Ethernet. It is the chip used in charge cards and printers, and even blood sugar monitors. It can also be used to store data that regulates the operation of microcontrollers as well as a way to recover from power-on reset scenarios. 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 turned on the electrons are released and are trapped in a 0 state or a 1 state based on the voltage applied. The EEPROM can be read by determining the state of these transistors. If the EEPROM state is “0” and it is “0”, it is in no use. If the EEPROM is in the “1” state it has a value of 1. In between these states, there isn't any stored information, but it is able to be written to. EEPROMs can be erased by a short time of the voltage applied to the gate. The EEPROM has the advantage that it can be erased and written to without the need for external circuitry. This makes it extremely useful in systems where memory is required to be updated regularly for example, remote keyless system microcontrollers. 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, for example, are very popular and are found in digital cameras. These are used to store multimedia files for long-term storage and retrieval. However, they are not true EEPROMs and their core functions differ from the ones of true EEPROMs. However, EEPROMs continue to be used extensively due to their versatility, and their capacity to store small quantities of data in a limited space. What is OBDII? In the past the majority of car manufacturers had their own systems to diagnose problems with their vehicles. In 1996, the government mandated that all cars have a common system to read diagnostic codes. The new system known as OBD-II uses the same diagnostic code and port system for all models and models sold in the US. This means that any mechanic is able to quickly diagnose a problem with your vehicle by plugging it into the specific tool. The OBD-II reads a variety of errors within the engine and other components using a standard diagnostic plug. The data is saved to the car's computer to be later analysed. This allows the system to identify and repair any faults before they cause serious damage. Mechanics can then connect to the OBD-II port using a scan tool, which will show all error codes and show what part of the system they come from. Scan tools have a higher computing capacity than code readers and can read more error codes. They can also display live data graphs, and record data for later analysis. Some tools are capable of performing more complex functions such as changing the code of an ECU or offering options to improve performance. These high-end tools are usually employed by professionals in the field of automotive mechanics and are more expensive than basic code scanners. When you connect a scan tool to an OBD-II connector, it will detect the protocol 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 cars, ISO 14230-4, used in a variety of European and Asian vehicles, and CAN. Some scan tools tell you what the code is referring to. Others will simply give you the code, and you'll need to do some internet research to figure out what it means. What is CAS Unit? The CAS module is an BMW module that controls the antitheft system of the vehicle. The system works by analyzing the coded signal on the key fob, and verifying it using the CAS module. If the signal is valid it is then 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 not working, 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 checked as soon as possible by a professional. The CAS system utilizes the BMW ICOM VCDS to communicate with the engine and other vehicle systems. The VCDS connects to the CAS via a cable that is specially designed with a DIN connector at the end. The VCDS can perform a number of functions, such as showing error codes or altering the timing of the ignition. It also comes with a range of security features that shield the vehicle from theft. BMW automobiles are equipped 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. The key is encased with a transponder chip that transmits the coded signal. This signal is sent through loop antenna (coil) at the lock for ignition. CasSystem implements the logic of CAS state. This class has to be installed on every instrument which needs to receive data. Multiple instances of this class can result in unintended behavior. CasSystem also manages alert messages, in addition to providing state information. It does this by publishing a cas_activate_alert subject that needs event data as an object that has key and priority properties. This topic specifies the ID of the alert you'd like to activate and its priority level. The CasSystem will issue an alert message on the topic cas_alert_displayed and cas_alert_hidden topic (defined by CasEvents). It will also subscribe to the cas_master_warning_active and cas_master_caution_active topics to consume their statuses. How to program a BMW Key BMW offers drivers in the Murrieta area keyless entry, a convenient feature that allows you to lock and unlock your car without having to use the physical key. The keyless entry system can only activated when the key fob is programmed to the car. To accomplish this, you'll have to follow a few easy steps. This process differs slightly depending on whether you're looking to pair a new key fob with your existing BMW or are beginning from scratch and don't have a functioning key. First, you need to put the working key fob in your car and the one you want to program. Be sure that all the windows and doors are closed. Insert the working key into the ignition, and turn it to the first position and quickly returning five times (do not start the engine). Turn the key back and remove it. Hold the unlock button while pressing the lock button (the BMW Logo) three times quickly. Then release the unlock button and the door locks should lock and unlock automatically. Repeat this procedure for each additional key fob. The final step is to connect your smartphone to your vehicle via Bluetooth. Start the BMW Connected app and log in. From there, tap the BMW Digital Key setup button. This will enable you to use the key using the Digital Wallet App. After you've completed the steps, your BMW key fobs are now ready to be used by the other members of your family and friends on their Corona commutes. For drivers who need help, our service department is always available to share more tips and tricks for the most successful BMW experience! Change the battery in the battery of your BMW key fob is a different task that you may need to do on occasion. This is a simple job that you can accomplish at home. To replace the battery, all you need to do is remove the key fob cover, carefully removing the old battery, and then replace it with a brand new CR2032. This will give you back your keys and have you back on the road again in the shortest amount of time!