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How to Programming a BMW Key Fob It is crucial that mechanics and locksmiths remain up-to-date with the latest technology in automotive. This includes key duplication and programming. This will help them to tackle complex issues like BMW key fob programming. To program a new key begin by inserting the new key into the ignition and turning it to position 1. The dash and accessories lights should turn on. What is EEPROM? The EEPROM chip is a non-volatile memory that can be erased or reprogrammed. It can be used to store a variety of things, such as serial numbers as well as unique data in nearly any device connected to Ethernet. It is also the chip that is found in printers and charge cards and blood sugar monitors. It can also be used to store data sequences that regulate microcontrollers' operations, as well as to allow for recovering from power-on reset conditions. The fundamental EEPROM chip is comprised of two field effect transistors. One has what is called a floating gate, and the other is a control gate. When the device is powered with electricity, electrons are released from the gate, and they can be held in a 0 or 1 state dependent on the voltage that is applied. This transistor state can be used to read the EEPROM. If the EEPROM state is “0” and it 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, but it is able to be written to. The EEPROM can be erased by applying a specific voltage to the gate for a brief period of time. The EEPROM has the advantage that it can be erased and written to without the need for external circuitry. This makes EEPROMs extremely useful for systems that require frequent memory updates like remote microcontrollers for keyless systems. There are different types of memory chips that offer similar functions, but are better suited for long-term storage. Modern flash memory chips are used in computers and digital cameras. They are used to store multimedia files for both long-term storage and retrieval. However, they aren't considered to be EEPROMs as their core functions are different from those of true EEPROMs. EEPROMs are still extensively used, however, due to their versatility and the ability to store a limited amount of data in a tiny space. What is OBDII? Up until recently, most automobile manufacturers had their own diagnostic systems to diagnose issues with their vehicles. In 1996, the government ordered that all cars utilize a standard system to read diagnostic codes. This new system, known as OBD-II is based on the same port and diagnostic code system across all makes and models of automobiles sold in the US. This means that any mechanic can quickly diagnose a problem with your vehicle by plugging in the special tool. The OBD-II detects a variety of issues within the engine and other components using a standard diagnostic plug. The data is saved to the car's computer to be later analysed. The system is able to detect and fix any issues before causing significant damage. The mechanic can connect an OBD-II scan tool to the port that will display error codes and indicate where they originated. Scanners have a higher computing capacity than code-readers and are able to read a greater range of error codes. They also display live data graphs, and store data that can be later analyzed. Some tools are able to perform advanced functions like reprogramming the ECU and supplying performance-enhancing options. These tools are usually utilized by skilled automotive technicians and are more expensive than simple code scanners. When you connect a scanner tool to an OBD II connector, it will recognize the protocol and communicate with the vehicle using the correct pins. There are numerous protocols. The most well-known are SAE J1850 (KWP2000) that is used by Ford and certain GM vehicles ISO 14230-4, which is used in a variety of European and Asian vehicles and CAN. Certain scan tools will tell you exactly what the code is referring to. Others will give you the code, and you'll have to conduct some online research to figure out what it means. What is CAS unit? The CAS module is a BMW unit that controls the antitheft system of the car. The system works by taking an encoded signal from the key fob and then 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 the signal is invalid the engine won't start. BMW CAS module failures can result in a variety of symptoms such as key fob issues and central locking, alarm activation and dashboard warning lights. If you're experiencing any of these symptoms, it's crucial to get the CAS module checked by a qualified technician as soon as you can. The CAS system makes use of the BMW ICOM VCDS to communicate with the engine and other vehicle systems. The VCDS is connected to the CAS using an extra cable that has a DIN connector at the end. The VCDS has several functions that include showing error codes and changing the timing of the ignition. It also offers a variety of security features to protect the vehicle from theft. In addition to the ICOM VCDS, BMW vehicles are equipped with a CAS component that is integrated into the key. The CAS module doesn't use batteries and is powered by the ignition coil. A transponder chip is integrated inside the key to transmit the signal that is coded to the CAS module. This is transmitted via an antenna coil (loop) at the ignition lock. The CAS state logic is implemented in the CasSystem class. This class has to be created on every instrument which needs to receive data. Making multiple instances of this class can cause undesirable behavior. CasSystem also manages alert messages in addition to providing state data. It does this by publishing a cas_activate_alert subject that requires event information as an object that has key and priority properties. The topic specifies both the ID of the alert you want to activate and the priority level. The CasSystem will send an alert message on the topic of 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 with keyless entry. It's an easy feature that allows you to lock and unlock your car without the need for a physical key. The keyless entry system can only activated after the key fob is programmed to the car. It's only some easy steps. The process is slightly different depending on whether you are pairing a new BMW key fob to your existing BMW or if you are starting from scratch with no working BMW key. First, you need to insert the working key fob into your vehicle, along with the one you want to program. Make sure all the windows and doors are shut. Put the working key into the ignition and turn it five times to position 1 and then back. Do not start the car. Remove the key by turning it backwards. With the key fob in your pocket hold the unlock button as you press the lock button (the BMW logo) three times in a row. Then release the unlock button and the door locks should lock and unlock automatically. Repeat this process for each key fob. The final step is connecting your smart phone to your vehicle using Bluetooth. Open the BMW Connected app and log in. The BMW Digital Key setup button will appear. This will enable you to use the key with the Digital Wallet App. Once you've completed the steps, your BMW key fobs are ready to be used by other members of your family as well as your friends during their Corona commutes. For drivers who need help, our service department is always ready to offer more advice and tricks for the most successful BMW experience! Change the battery in your BMW key fob is yet another task you might need to do on occasion. It's a fairly easy task that can be completed at home. To change Read More Here , all you need to do is remove the key fob cover and carefully take off the battery that was in place, 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.