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How to Programming a BMW Key Fob It is crucial that locksmiths and mechanics stay up-to-date with the latest technologies in automotive technology. This includes key duplication and programming. This will enable them to handle complex issues such as BMW key fob programing. Begin by putting your working key into the ignition and turning the key until it is in position 1. The dash and accessory lights should come on. What is an EEPROM? The EEPROM chip is a non-volatile memory that can be erased or reprogrammed. It can be used to store a number of things, such as the serial numbers and other unique information in virtually everything connected to Ethernet as well as the chip used in charge cards, printers and even blood glucose monitors. It is also used to store data sequences that regulate the microcontrollers' operation, as well as to allow for recovering from resets caused by power-on conditions. The fundamental EEPROM chip is comprised of two field effect transistors. The floating gate is on one side and the control gate is on the other. When bmw key fobs is powered by electrons, they are released from the gate and may be held in one or zero state dependent on the amount of voltage is applied. The EEPROM can be read by determining the state of these transistors. If the EEPROM state is “0” and it is “0”, it has no value. When the EEPROM state is “1” is the case, it has a value of 1. In between these states, there is no stored information, but it can be written to. The EEPROM can also be erased by applying an appropriate voltage to the gate for a brief period of time. The EEPROM has the advantage that it can be erased and written to without external circuitry. This makes it very useful in systems where memory is required to be updated regularly like remote keyless microcontrollers in systems. There are different types of memory chips which have similar functionality but are better suited for long-term storage. Modern flash memory chips, for example are extremely popular and can be found in computers and digital cameras. They are typically used to store multimedia files intended to be used for short-term as well as long-term storage and retrieval. However they aren't EEPROMs and their core functions differ from those of real EEPROMs. However, EEPROMs continue be extensively used due to their versatility, and their ability to store minimal amounts of data in a limited space. What is OBDII? Until recently the majority of car manufacturers had their own methods for diagnosing vehicle problems. In 1996, the government demanded that all vehicles have a standardized system for reading diagnostic codes. This new system called OBD-II uses the same diagnostic code and port system for all models and models sold in the US. This means that if you encounter an issue with your vehicle it will be simple for any mechanic to determine what the issue is by plugging in a specific tool. The OBD-II detects various errors within the engine and other parts using a standard diagnostic plug. The data is saved to the computer of the car to be later analyzed. The system is able to detect and repair faults prior to causing significant damage. The mechanic can connect an OBD-II scan tool to the port that will display error codes and inform where they came from. Scanners have a greater computing capacity than code readers and can read a larger variety of error codes. They can also show live data graphs as well as record data to be later analyzed. Certain tools are capable of performing complex tasks such as changing the programming of an ECU or supplying performance-enhancing options. These higher-end tools are typically used by professional 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 appropriate pins. There are numerous protocols, but the most common ones are SAE J1850 that is used in Ford and a few GM vehicles ISO 14230-4 (KWP2000) and ISO 14230-4 (KWP2000), which is used in a number of European or Asian vehicles, and CAN, which is used on the majority of American-made cars. Some scan tools will even tell you what the code means, while others will provide the code, and require some internet research to figure out what it means. What is CAS unit? The CAS unit is an BMW module that regulates the antitheft system of the car. The system works by reading the coded signal on the key fob, and then confirming it with the CAS module. The CAS module will send an enable signal to the engine control unit to verify that the signal is valid. If the signal is not valid the engine will not start. A BMW CAS module failure can result in a variety symptoms, such as key fobs that aren't working, alarm activation issues, central locking issues and warning lights appearing on the dashboard. If you're experiencing any of these symptoms, it's important to inspect the CAS module by a professional as quickly as possible. The CAS system communicates to the vehicle's engine and other systems by using the BMW ICOM VCDS. The VCDS is connected to the CAS by special cables with an DIN connector at the end. The VCDS is a multi-purpose device such as displaying error codes and changing the timing of the ignition. It also has a variety of security features that protect the vehicle from theft. BMW vehicles come with the CAS key module addition to the ICOM VCDS. The CAS module doesn't use batteries and is powered by the ignition coil. A transponder chip is embedded in the key to transmit the signal that is coded to the CAS module. The signal is transmitted through coil antenna (loop) at the ignition lock. CasSystem implements the logic of CAS state. You must create one instance of this class for each instrument that requires information from CAS. Multiple instances of this class may cause undesirable behavior. In addition to providing state information, the CasSystem class also handles the display of alert messages. To do so it creates a cas_activate_alert topic that requires event information in the form of an object with the key and priority properties. The topic specifies both the ID of the alert you'd like to activate and its priority level. The CasSystem will publish an alert message on the cas_alert_displayed topic 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 you program a BMW Key BMW offers drivers in the Murrieta area keyless entry, a feature that lets you to lock and unlock your vehicle without using a physical key. This keyless entry system only activated once the key fob is programmed to the car. To do this, you'll need follow a few simple steps. The process varies slightly depending on whether you wish to connect a new key fob with your existing BMW or are starting from scratch and don't have a working key. The first step is to remove the working key fob as well as the ones you wish to program inside your car, ensuring that all windows and doors are closed. Insert the working key into the ignition, and turn it to the first position and back rapidly five times (do not start the engine). Remove the key by turning it backwards. 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 be locked and unlock automatically. Repeat this process to program each additional key fob. The last step is to connect your smart phone to your car via Bluetooth. Launch the BMW Connected app and log in. The BMW Digital Key setup button will appear. This will allow you to use the key through the Digital Wallet App. After you've completed these steps, the BMW key fobs are now able to be used by other members of your Corona family or your family. Our service department is ready to give you more tips and tricks to help you get the most out of your BMW driving experience. There may be a need to change the battery in your BMW's key fob. Fortunately, it's an easy task that can be done at home. To replace the battery, all you have to do is take off the cover on your key fob and then carefully remove the old battery, and then replace it with a brand new CR2032. You will have your keys back and on the road in the blink of an eye.