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How to Programming a BMW Key Fob It is essential that locksmiths and mechanics stay up-to-date with the latest automotive technology. This includes key duplication and programming. This will enable them to deal with complex issues, such as BMW key fob programming. Start by inserting your working key into the ignition, then turn the key to position 1. The dash and accessory lights should come on. What is an EEPROM? The EEPROM is a non-volatile memory chip that can be erased and reprogrammed. It can be used to store various things, including serial numbers and other unique information in nearly every device connected to Ethernet. It is also the chip used in charge cards and printers and blood sugar monitors. It can also be used to store data that controls the operation of microcontrollers as well as a method to recover from power-on resets. The fundamental EEPROM chip is comprised of two field effect transistors. One of them is floating gate, while the other is a control gate. When the device is turned on, electrons are released and can be trapped either 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 state is “0”, it has no value. If the EEPROM is in the “1” state, it has a value of one. In between these states, there isn't any stored data, however it is able to be written to. EEPROMs can be erased by an extremely short amount of the voltage applied to the gate. The advantage of the EEPROM is that it can be erased and written into without the need for any external circuitry. This makes EEPROMs very useful for systems which require frequent memory updates like remote microcontrollers that do not require keys. There are G28 of memory chips which provide similar functionality, but are better suited for long-term storage. Modern flash memory chips are a common feature in digital cameras and computers. These are often used to store multimedia files to be used for short-term as well as long-term storage and retrieval. Despite this, they are not true EEPROMs and their core functions differ from those of true EEPROMs. They are still used, but due to their versatility and ability to store a limited amount of data in a small space. What is OBDII? Up until recently, most car manufacturers used their own diagnostic systems for diagnosing vehicle problems. In 1996, the government mandated that all vehicles use a standard system for reading diagnostic codes. This new system, which is called OBD-II and uses the same port and diagnostic code system for all models and makes of automobiles sold in the US. This means that if there is a problem with your car it will be simple for any mechanic to pinpoint what the issue is by plugging in a special tool. The OBD-II detects various issues within the engine and other components using an ordinary diagnostic plug. The information is saved in the computer of the car to be later analyzed. The system is then able to identify and fix any issues before damaging the car in a significant way. The mechanic can connect an OBD-II scan tool to the port and it will display error codes and indicate where they came from. Scanners have a higher computing capacity than code readers and can read a larger variety of error codes. They also display live data graphs, and record data for later analysis. Some tools are capable performing more complex functions such as changing the programming of an ECU or offering performance-enhancing options. These tools are employed by auto technicians who are professionals and are generally more expensive than scanners for simple tasks. When connecting a scanner to the OBD-II port, it will recognize the protocol it is using and communicate with the vehicle by using the appropriate pins. There are many protocols. The most popular are SAE J1850 (KWP2000), used by Ford and some GM vehicles, ISO 14230-4, used in various European and Asian vehicles and CAN. Some scan tools can tell you exactly what the code is referring to. Others will just provide the code, and you will need to do some internet research to determine what it means. What is a CAS unit? The CAS module is a BMW module that controls the antitheft system of the car. The system works by taking a coded signal from the fob of the key and then verifying it using the CAS module. The CAS module will transmit an enable signal to engine control unit if it believes the signal is valid. If the signal is invalid the engine will not start. BMW CAS module malfunctions can cause a variety of issues including key fob problems alarm activation, central locking and warning lights on the dashboard. If you experience any of these symptoms, make sure you have the CAS Module checked immediately by an expert. The CAS system communicates with the vehicle's engine and other systems via the BMW ICOM VCDS. The VCDS connects to the CAS using a cable that is specially designed with a DIN connector at the end. The VCDS is a multi-purpose device that include displaying error codes and adjusting the ignition timing. It also provides a range of security features that protect the vehicle from theft. In addition to the ICOM VCDS, BMW vehicles come with a CAS component that is integrated into the key. The CAS module does not use batteries and is powered by the ignition coil. A transponder chip is embedded in the key to transmit the encoded signal to the CAS module. The signal is transmitted via loop antenna (coil) at the ignition lock. The CAS state logic is implemented in the CasSystem class. You should create one instance of this class on every instrument that needs to receive data from the CAS. Creating multiple instances of this class can cause undesirable behavior. CasSystem also manages alert messages in addition to providing state data. To do so it creates a cas_activate_alert topic that needs event data in the form of an object with the key and priority properties. The topic specifies both the ID of the alert you wish to activate as well as its priority level. Once you've activated the alert and the CasSystem will publish a message for it 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 you program a BMW key BMW offers keyless entry to drivers in the Murrieta region. This convenient feature allows you to lock and unlock your car without the physical key. This keyless entry system is only activated after the key fob is programmed to the car. You'll need to follow a couple of easy steps. The procedure may differ dependent on whether you're pairing a new BMW key fob with your existing BMW, or starting from scratch with no working BMW key. The first step is to remove the key fob that is working and the ones you'd like to program inside your car, making sure all doors and windows are closed. Insert the working key into the ignition, turning it to one position, then return it quickly five times (do not start the engine). Turn the key back again and then take it out. 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 process to program each key fob. The final step is connecting your smartphone to your vehicle via Bluetooth. Launch the BMW Connected app and log in. From there, tap the BMW Digital Key setup button. This will allow you to use the key 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 as well as your friends during their Corona commutes. Our service department is ready to offer more tips and tricks to enjoy a successful BMW driving experience. It is also possible to replace the battery on the key fob of your BMW. This is a simple task that you can accomplish at home. To change the battery all you need to do is take off the key fob cover, carefully remove the battery that was in place, and then replace it with a fresh CR2032. This will give you back your keys and put you back on the road again in the shortest amount of time!