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How to Programming a BMW Key Fob It is essential that locksmiths and mechanics stay up-to-date on the latest technologies in automotive technology. This includes key duplication and programming. This will allow them to tackle complex problems like BMW key fob programming. To program a new key begin by inserting the working key into the ignition and then turning it to position 1. The dash and accessories lights should be on. What is EEPROM? The EEPROM is a non-volatile memory chip that can be erased and reprogrammed. It can be used to store a variety of things, like serial numbers as well as unique data in nearly every device connected to Ethernet. It is the chip found in printers, charge cards, and even blood sugar monitors. It is also used to store data sequences that control the operation of microcontrollers and also to offer a method of recovering from power-on reset conditions. The basic EEPROM chip has two field effect transistors. The floating gate is located on one side, while the control gate is on the other. When the device is turned on the electrons are released. They may be held in a 0 state or a state of 1 based on the voltage applied. This transistor state can be used to read the EEPROM. When the EEPROM is in the “0” state, it has no value. When the EEPROM state is “1” it has a value of 1. In between these states, there is no stored data, however it can be written to. The EEPROM can also be erased by applying a specific voltage to the gate for a short period of time. The EEPROM has the advantage that it can be erased and written to with no external circuitry. This makes EEPROMs very useful for systems that require frequent updates to memory for remote microcontrollers for keyless systems. There are various types of memory chips that offer similar functions, but are better suited to long-term storage. Modern flash memory chips are used in digital cameras and computers. These are used to store multimedia files for long-term storage and retrieval. Despite this they aren't EEPROMs and their primary functions differ from those of real EEPROMs. However, EEPROMs continue to be used extensively due to their versatility and ability to store tiny quantities of data in a small space. What is OBDII? In the past the majority of automobile manufacturers had their own systems to identify problems with vehicles. In 1996, the government required that all vehicles have an established system to read diagnostic codes. This new system, which is called OBD-II, uses the same port and diagnostic code system across all models and makes of vehicles that are sold in the US. This means that if there is problems with your car, it will be easy for any mechanic to pinpoint what is causing the issue by plugging in a special tool. The OBD-II detects various issues within the engine and other components using a standard diagnostic plug. The information is saved in the computer of the car to be later analyzed. This allows the system to detect and repair any faults before they cause major damage. Mechanics can then connect to the OBD-II port with a scan tool, which displays all error codes and show the part of the system they came from. Scanners have a greater computing power than code-readers and can read a wider variety of error codes. They also display live data graphs, and record data to be analyzed later. Some tools even perform more advanced functions such as changing the ECU and providing performance enhancing options. These higher-end tools are typically 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 by using the appropriate pins. There are many different protocols that are used, but the most popular ones are SAE J1850 PWM, which is used in Ford and a few GM vehicles, ISO 14230-4 (KWP2000), which is used in a variety of European or Asian vehicles, and CAN, which is found in the majority of American-made vehicles. Some scan tools will even explain what the code actually means, while others will provide the code, and require a bit of internet sleuthing to discover what it means. What is CAS Unit? The CAS unit is an BMW module that manages the car's antitheft system. The system works by reading the coded signal from the key fob, and verifying it using the CAS module. The CAS module will send an enable signal to the engine control unit if it believes the signal is valid. If it's not, the engine won't start. A BMW CAS module malfunction can result in a variety symptoms, including key fobs that aren't working or alarm activation issues. Other symptoms include central locking issues and warning lights appearing on the dashboard. If you're experiencing any of these symptoms, it's crucial to inspect the CAS module by a professional as quickly as possible. The CAS system communicates with vehicle's engine and other systems using the BMW ICOM VCDS. The VCDS is connected to the CAS by an extra cable that has an DIN connector at the end. The VCDS is able to perform a variety of functions, such as showing 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 a CAS key module in addition to the ICOM VCDS. The module is powered by the ignition coil and is not designed to work with batteries. The key is equipped with a transponder chip that transmits the coded signal. This is transmitted via a coil antenna (loop) at the ignition lock. CasSystem implements the logic of CAS state. This class should be created on every instrument that 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. To do so it generates a ca_activate_alert topic that requires event information in the form of an object that has the key and priority properties. The topic contains the ID and, optionally, the suffix of the alert that you want to activate, along with the 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 do I 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 using keys that are physically present. This keyless entry system only activated when the key fob is programmed to the car. You'll only need to follow two easy steps. The procedure varies slightly based on whether you wish to connect a brand new key fob with your existing BMW or are starting from scratch and do not have a functioning key. First, you must insert the working key fob in your vehicle, along with the one you'd like to program. Be sure that all the windows and doors are shut. Put the working key into the ignition and turn it five times to position 1. then back. Don't start the vehicle. Turn the key back and then take it out. With the key fob in your pocket hold down the unlock button while you press the lock button (the BMW logo) three times quickly. Then release the unlock button, and the door locks should be locked and unlock automatically. Repeat this process for each additional key fob. Connecting your smartphone to your vehicle via Bluetooth is the last step. Launch the BMW Connected app and log in. From there, tap the BMW Digital Key setup button. This will activate the key in your smartphone and allow you to use it using the Digital Wallet app. Once you've completed these steps the BMW key fobs are now ready to be used by the other members of your family and your friends during their Corona commutes. replacement bmw key is happy to offer more tips and tricks to get the most out of your BMW driving experience. Changing the battery in your BMW key fob is another task you might need to perform at times. This is a simple task that you can accomplish at home. To replace the battery, all you need to do is remove the cover on your key fob and then carefully removing the battery that was in place, and then replace it with a fresh CR2032. The keys will be back and be on the road in no time.