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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. This includes key duplication and programming. This will enable them to tackle complex issues like BMW key fob programming. To program a new key begin by inserting the working key into the ignition and turning it to position 1. The dash and accessories lights should come on. What is EEPROM? The EEPROM chip is a non-volatile memory that can be erased or reprogrammed. It is used to store a number of things, including the serial numbers and other unique information that is found in nearly everything connected to Ethernet as well as the chip in charge cards, printers and even blood glucose monitors. It is also used to keep data sequences that govern microcontrollers' operations, as well as to allow for recovering from power-on reset situations. The fundamental 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 powered up the electrons are released. They are trapped 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 1. In between these states, there isn't any stored information, but it is possible to write to. The EEPROM can also be erased using 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 without the need for external circuitry. This makes it a great choice for systems that is required to be updated regularly for example, remote keyless microcontrollers for remote systems. However there are different memory chip models that provide similar capabilities and are more suitable for long-term storage and retrieval of large files. Modern flash memory chips, like are extremely popular and are used in computers as well as 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 and their primary functions differ from those of true EEPROMs. However, EEPROMs continue to be used extensively due to their versatility, and their ability to store minimal quantities of data in a limited space. What is OBDII? In the past, the majority of car manufacturers had their own methods to diagnose problems with their vehicles. In 1996, the government demanded that all cars have an uniform system to read diagnostic codes. This new system, called OBD-II is based on the same port and diagnostic code system across all models and makes of automobiles sold in the US. Visit Homepage means that any mechanic is able to easily diagnose a problem in your car by plugging in the special tool. The OBD-II detects a variety of errors within the engine and other parts with the standard diagnostic plug. The information is stored in the computer of the car for later analysis. This lets the system detect and repair any faults before they cause major damage. Technicians are able to connect to the OBD-II port with a scan tool, which displays all error codes and show which part of the system they came from. Scan tools have a greater computing power than code readers and read more types of error codes. They also display live data graphs, and record data to be analyzed later. Some tools are capable performing complex tasks like changing the code of an ECU or offering options to improve performance. These higher-end tools are typically used by professional automotive technicians and are more expensive than basic code scanners. When you connect a scanner tool to an OBD-II connector it will detect the protocol and communicate with the vehicle by using the appropriate pins. There are many protocols. The most popular are SAE J1850 (KWP2000) that is used by Ford and certain GM automobiles, ISO 14230-4, used in a variety of European and Asian vehicles, and CAN. Some scan tools tell you what the code signifies. Others will just give you the code and you'll need to conduct some online research to figure out what it means. What is CAS Unit? The CAS module is a BMW unit that manages the antitheft system of the car. The system works by analyzing the coded signal on the key fob and then confirming it with 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 could lead to a variety of symptoms, including key fob not working problems 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 examined 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 is connected to the CAS via an extra cable that has an DIN connector on the end. The VCDS has several functions such as displaying error codes and adjusting the ignition timing. It also offers a variety of security features that shield the vehicle from theft. In addition to the ICOM VCDS, BMW vehicles come with a CAS module which is integrated into the key. The module is powered by the ignition coil and is not designed to use batteries. A transponder chip is integrated in the key to transmit the coded signal to the CAS module. This is transmitted through a loop antenna (coil) at the lock for ignition. The CAS state logic is implemented by the CasSystem class. You must create one instance of this class on every instrument that needs to receive information from the CAS. The creation of multiple instances of this class can result in undesirable behavior. In addition to providing information about state, the CasSystem class also controls the display of alert messages. It does this by publishing a ca_activate_alert subject that requires event data as an object with key and priority properties. This topic contains the ID and, optionally, the suffix of the alert you wish to activate, along with the priority level. After you've activated an alert and the CasSystem will display an alert message on the cas_alert_displayed and ca_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 the BMW Key BMW offers drivers in the Murrieta area with 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 once the key fob is programmed to the car. It's only two easy steps. The procedure is slightly different depending on whether you are pairing a brand new BMW key fob with your existing BMW or starting from scratch without a working BMW key. The first step is to get the working key fob as well as the ones you'd like to program inside your vehicle, making sure all doors and windows are closed. Put the working key into the ignition and turn it quickly five times to position 1 and then back. Do not start the car. Remove the key by turning it backwards. With the key fob still inside of your pocket, hold the unlock button while you press the lock button (the BMW logo) three times fast. Release the unlock button, and the door locks will be locked and unlocked themselves. Repeat this procedure for each key fob. Connecting your smartphone to your vehicle via Bluetooth is the last step. Log in to the BMW Connected application. From there, click the BMW Digital Key setup button. This will enable you to use the key using the Digital Wallet App. Once you have 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 provide more advice and tricks to help you enjoy a successful BMW driving experience. Change the battery in the battery of your BMW key fob is yet another task that you may need to perform at times. This is a simple task that you can do at home. To change the battery all you need to do is remove the cover on your key fob and then carefully take off the battery that was in place, and then replace it with a brand new CR2032. This will give you back your keys and put you back on the road again in the shortest amount of time!