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How to Programming a BMW Key Fob In the ever-changing world of automotive technology it is crucial for locksmiths and mechanics alike to stay educated on key programming and duplicate. This will help them handle complex issues such as BMW key fob programming. To program a new key start by inserting the working key into the ignition and turning it 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 a variety of things, including the serial numbers as well as 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 can be used to store information that controls the microcontroller's operation as well as a method to recover from power-on reset scenarios. The basic EEPROM chip contains two field effect transistors. The floating gate is located on one and the control gate is on the other. When the device is turned on the electrons are released and can be trapped either in a 0 state or a state of 1 based on the voltage applied. This transistor state can be used to read the EEPROM. When the EEPROM state is “0” is the state, it has no value. If the EEPROM state is “1” is the case, it has a 1 value. In between these states, there is no stored data, however it is possible to write to. EEPROMs are erased with a short time of the voltage that is applied to the gate. The advantage of the EEPROM is that it can be erased and written to without any external circuitry. This makes it a great choice in systems where memory needs to be regularly updated like remote keyless microcontrollers in systems. There are other kinds of memory chips that have similar functionality but are more suitable for long-term storage. Modern flash memory chips, for instance, are very popular and are used in computers as well as digital cameras. They are commonly used to store multimedia files intended for both short-term and long-term storage and retrieval. However, they aren't considered to be EEPROMs, and their core functions are different from the functions of real EEPROMs. EEPROMs are still extensively used, but because of their versatility and ability to store a small amount of data in a small space. What is OBDII? In the past the majority of car manufacturers had their own systems to diagnose problems with their vehicles. In 1996, the government imposed that all cars have a common system for reading diagnostic codes. This new system called OBD-II utilizes the same diagnostic code and port system for all brands and models sold in the US. This means that if you encounter problems with your car, it will be easy for any mechanic to figure out what the issue is by plugging in a special tool. The OBD-II reads a variety of errors within the engine and other components using an ordinary diagnostic plug. The data is saved to the computer of the car to be later analyzed. The system can then detect and repair any faults before creating significant damage. The mechanic can connect an OBD-II scan tool to the port that will display error codes and inform where they originated. Scanners have more computing power than code-readers and can read a larger variety of error codes. They also display live data graphs and save data for later analysis. Some tools can even perform advanced functions like programming the ECU and offering performance-enhancing options. These high-end tools are usually used by professional automotive technicians and are more expensive than standard code scanners. When connecting a scanner to the OBD-II port it will detect the protocol it is using and communicate with the vehicle by using the appropriate pins. There are many different protocols that are used, but the most popular ones are SAE J1850, which is used in Ford and some GM vehicles, ISO 14230-4 (KWP2000), which is used in a variety of European or Asian vehicles, and CAN, which is found on most US-made vehicles. Certain scan tools can provide you with the code actually means, while others will provide the code and require an internet search to find out what it means. What is CAS Unit? The CAS unit is an BMW module that manages the car's antitheft mechanism. The system works by reading the coded signal from the key fob, and then verifying it with the CAS module. If the signal is valid the CAS module sends an enable signal to the engine control unit. If bmw car key case is not valid the engine won't start. BMW CAS module malfunctions can cause a number of symptoms like key fob malfunctions alarm activation, central locking, and dashboard warning lights. If you're experiencing any of these symptoms, you need to have the CAS module inspected by a qualified technician 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 using special cables with a DIN connector on the other end. The VCDS can perform a variety of functions, including displaying error codes and changing the timing of the ignition. It also comes with a range of security features to protect the vehicle from theft. BMW automobiles are equipped with the CAS key module addition to the ICOM VCDS. The module is powered by the ignition coil and is not designed to use batteries. A transponder chip is embedded in the key to transmit the signal that is coded to the CAS module. This signal is transmitted using a coil antenna (loop) at the ignition lock. CasSystem implements the logic of CAS state. This class should be created on every device that requires data. Making multiple instances of this class could result in undesired behavior. CasSystem also manages alert messages in addition to providing state data. To do so it creates a cas_activate_alert topic that requires event data in the form of an object with the key and priority properties. This 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 cas_alert_displayed and the 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 to program a BMW key BMW offers drivers in the Murrieta area 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 is only activated once the key fob is programmed to the car. It's only two easy steps. The procedure may differ dependent on whether you're pairing a brand new BMW key fob with your existing BMW, or starting from scratch with no working BMW key. The first step is to place the working key fob in your vehicle and then insert the one you want to program. Make sure all windows and doors are shut. Insert the working key into the ignition, turning it to the first position and return it quickly five times (do not start the engine). Remove the key by turning it backwards. With the key fob in 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 unlock and lock themselves. Repeat this process for each key fob. The final step is connecting your smartphone to your car via Bluetooth. Launch the BMW Connected app and log in. Then, tap the BMW Digital Key setup button. This will allow you to use the key using the Digital Wallet App. After you've completed these steps, the BMW key fobs can then be used by other members of your Corona family or friends. Our service department is eager to provide more advice and tricks to help you have a successful BMW driving experience. Change the battery in your BMW key fob is a different task you may have to do on occasion. It's a simple process that you can complete at home. To replace the battery, you just need to take off the key fob, then take off the battery that is old and replace it with the new CR2032. This will allow you to get back your keys and get you on the road again in no time!