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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 help them to tackle complex problems like BMW key fob programming. Start by inserting your working key into the ignition and then turning the key to position 1. The dash and accessory lights should come on. What is EEPROM? The EEPROM chip is a nonvolatile memory which can be erased or modified. It can be used to store various things, like serial numbers as well as unique data in virtually every device that is connected to Ethernet. It is the chip that is found in printers, charge cards as well as blood sugar monitors. It can also be used to store data sequences that control microcontrollers' operations, as well as to offer a method of recovering from resets caused by power-on conditions. The basic EEPROM chip contains two field effect transistors. The floating gate is located on one side and the control gate is on the other. When the device is powered, electrons are released from the gate and may be held in the state of 0 or 1, dependent on the amount of voltage is applied. This transistor state can be used to read the EEPROM. If the EEPROM is in the “0” state there is no value. When the EEPROM is in the “1” state it has a value of 1. In between these states, no data is stored, but it is still possible to write. EEPROMs can be erased by the short duration of the voltage applied to the gate. The EEPROM is advantageous because it can be erased and written to with no external circuitry. This makes EEPROMs extremely useful for systems that require frequent updates to memory, such as remote microcontrollers for keyless systems. There are other types of memory chips that have similar functionality but are better suited to long-term storage. Modern flash memory chips are used in digital cameras and computers. These are often used to store multimedia files that are intended for both short-term and long-term storage and retrieval. However, they aren't considered to be true EEPROMs as their core functions are different from those of genuine EEPROMs. However, EEPROMs continue to be used extensively due to their versatility and ability to store minimal quantities of data in a restricted space. What is OBDII? Prior to recently, the majority of car manufacturers used their own diagnostic systems to diagnose car problems. In 1996, the government imposed that all vehicles have a common system to read diagnostic codes. This new system called OBD-II utilizes the same diagnostic code and port system for all makes and models sold in the US. This means that any mechanic can quickly diagnose a problem with your vehicle by plugging it into the specific tool. The OBD-II system detects a variety of issues in the engine and other parts of the vehicle by using an ordinary diagnostic connector. The information is then stored in the car's computer system for later analysis. The system is then able to identify and repair faults prior to causing significant damage. The mechanic can connect an OBD-II scan tool to the port and it will display error codes and inform where they came from. Scan tools have more computing capacity than code readers and can read more types of error codes. They can also display live data graphs and store data that can be later analyzed. Some tools are able to perform advanced functions like programming the ECU and offering performance-enhancing options. These higher-end tools are typically used by professional automotive technicians and are more expensive than standard code scanners. When you connect a scanner tool to an OBD-II connector, it will recognize the protocol and communicate with the vehicle by using the correct pins. There are many protocols. The most popular are SAE J1850 (KWP2000), used by Ford and some GM automobiles, ISO 14230-4, used in various European and Asian vehicles and CAN. Some scan tools will even provide you with the code means, whereas others will provide the code and will require a bit of internet sleuthing to figure out what it means. What is a CAS unit? The CAS module is a BMW unit which controls the antitheft feature of the car. The system works by reading an encoded signal from the fob of the key and then verifying it using the CAS module. If the signal is valid the CAS module will send an enable signal to the engine control unit. If not the signal is valid, the engine won't begin. A BMW CAS module failure can cause a variety of symptoms, such as key fob not working problems, alarm activation issues, central locking issues, and warning lights on the dashboard. If bmw key experiencing any of these symptoms, it's crucial to get the CAS module checked by a professional as soon as possible. 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 special cables with a DIN connector at the end. The VCDS can perform a variety of functions, such as displaying error codes or adjusting ignition timing. It also comes with a range of security features that protect the vehicle from theft. BMW automobiles come with an CAS key module in addition to the ICOM VCDS. The CAS module doesn't use batteries and is powered by the ignition coil. A transponder chip is integrated in the key to transmit the encoded signal to the CAS module. The signal is transmitted via an antenna loop (coil) at the lock for ignition. CasSystem implements the logic of CAS state. This class has to be created on every instrument which needs to receive data. Multiple instances of this class may result in undesirable behavior. CasSystem also manages alert messages, in addition to providing state information. It does this by releasing a cas_activate_alert subject that needs event data as an object that has key and priority properties. This topic specifies the ID and optionally the suffix of the alert you wish to activate, as well as its priority level. Once you've activated an alert, the CasSystem will publish an alert message on the cas_alert_displayed and cas_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 to program the BMW Key BMW offers keyless entry to drivers in the Murrieta region. This feature makes it possible for you to lock and unlock your vehicle without using a physical key. However, this keyless entry system is only activated when the key fob is programmed to the vehicle. You'll only need to follow two simple steps. The procedure may differ depending on whether you are pairing a brand new BMW key fob with an existing BMW or starting from scratch with no working BMW key. The first step is to take the working key fob and the ones you'd like to program inside of your car, making sure all doors and windows are shut. Insert the working key into the ignition, and turn it to position one and return it quickly five times (do not start the engine). Remove the key by turning it backwards. With the key fob still in your pocket, hold down the unlock button as you press the lock button (the BMW logo) three times in a row. Release the unlock button, and the door locks will be locked and unlocked themselves. Repeat this process to program each additional key fob. Connecting your smartphone to your vehicle using Bluetooth is the last step. Open the BMW Connected app and log in. The BMW Digital Key setup button will be displayed. This will allow you to use the key using 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 and acquaintances on their Corona commutes. Our service department is ready to offer more tips and tricks on how to enjoy a successful BMW driving experience. It is also possible to replace the battery on the key fob of your BMW. Luckily, this is an simple job that can be done at home. To change the battery, all you need to do is remove the cover for your key fob and then carefully remove the old battery, then replace it with a new CR2032. This will return your keys and get you to your destination in no time!