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How to Programming a BMW Key Fob In the constantly evolving technology of automobiles its important for mechanics and locksmiths to stay educated on key programming and duplication This will allow them to tackle complex issues like BMW key fob programing To program a new key begin by inserting the new key into the ignition and turning it to position 1 The accessories and dash lights should be on What is an EEPROM The EEPROM is a nonvolatile memory chip that can be erased and changed It can be used to store a variety of things including the serial numbers and other unique information that is found in nearly everything connected to Ethernet as well as the chip in printers charge cards and even blood glucose monitors It can also be used to store data sequences that regulate the microcontrollers operation as well as to provide a means of recovering from poweron reset situations The fundamental EEPROM chip contains two field effect transistors One of them is floating gate while the other is a control gate When the device is powered by electrons they are released from the gate and can be held in the state of 0 or 1 depending on how much voltage is applied The EEPROM can be read by analysing the state of these transistors When the EEPROM state is 0 is the state it is in no use If the EEPROM state is 1 it has a 1 value In between these states no information is stored but it is still possible to write The EEPROM can also be erased by applying a specific voltage to the gate for a brief period of time The EEPROM is advantageous because it can be erased and written to with no external circuitry This makes it extremely useful in systems where the memory needs to be regularly updated such as remote keyless system microcontrollers There are different types of memory chips that have similar functionality but are better suited to longterm storage Modern flash memory chips for example are very popular and can be used in computers as well as digital cameras They are commonly used to store multimedia files to be used for shortterm as well as longterm storage and retrieval However theyre not considered to be true EEPROMs as their core functions are different from those of true EEPROMs EEPROMs are still extensively used however due to their versatility and capacity to store a small amount of data in a tiny space What is OBDII Prior to recently the majority of car manufacturers used their own diagnostic systems for diagnosing vehicle problems In 1996 the government ordered that all cars have a common system to read diagnostic codes The new system known as OBDII uses the same diagnostic code and port system for all models and models sold in the US This means that any mechanic can quickly diagnose a problem with your car by plugging in the tool that is specifically designed for The OBDII detects a variety of issues within the engine and other parts with a standard diagnostic plug The information is stored in the cars computer for later analysis This lets the system detect and repair any faults before they cause serious damage Technicians can connect to the OBDII port with a scan tool which will show all error codes and show what part of the system they come from Scan tools have more computing power than code readers and can detect more types of error codes They can also show live data graphs and record data for later analysis Some tools are able to perform more advanced functions such as changing the ECU and offering performanceenhancing options These higherend tools are typically utilized by skilled automotive technicians and are more expensive than basic code scanners When you connect a scanner tool to an OBDII connector it will detect the protocol and communicate with the vehicle using the appropriate pins There are numerous protocols however the most wellknown ones are SAE J1850 PWM which is utilized in Ford and a few GM vehicles ISO 142304 KWP2000 that is used in a number of European or Asian vehicles and CAN which is used on the majority of Americanmade cars Some scan tools can tell you what the code is referring to Others will provide the code and you will need to conduct some research on the internet to figure out what it means What is CAS Unit The CAS unit is an BMW module that manages the cars antitheft system The system works by reading an encoded signal from the fob of the key and confirming it with the CAS module The CAS module will send an enable signal to engine control unit if the signal is valid If not the engine wont start BMW CAS module failures could cause a variety of issues such as key fob issues alarm activation central locking and dashboard warning lights If youre experiencing any of these symptoms its important to have the CAS module inspected by a qualified technician as soon as possible The CAS system communicates with the vehicles engine and other systems by using the BMW ICOM VCDS The VCDS is connected to the CAS via special cables with an DIN connector at the end The VCDS is able to perform a variety of functions including showing error codes or altering the timing of the ignition It also comes with a range of security features to protect the vehicle from theft BMW vehicles come with the CAS key module addition to the ICOM VCDS The CAS module is powered by the ignition coil and is not designed to work with batteries The key is equipped with a transponder that transmits the coded signal The signal is transmitted through coil antenna loop at the ignition lock CasSystem implements the logic of CAS state This class has to be created on each instrument which needs to receive data replacement bmw key of multiple instances of this class can result in undesirable behavior In addition to providing state information and information about state the CasSystem class also controls the display of alert messages It does this by releasing a casactivatealert subject that requires event data as an object with key and priority properties The topic specifies both the ID of the alert you want to activate and the priority level Once youve activated the alert and the CasSystem will display an alert on the casalertdisplayed and caalerthidden event bus topics defined by the CasEvents interface It will also subscribe to the casmasterwarningactive and casmastercautionactive topics to consume their statuses How to program a BMW key BMW offers keyless entry for drivers in the Murrieta region This feature is convenient and allows you to lock and unlock your vehicle without the use of keys that are physically present This keyless entry system is only activated after the key fob has been programmed to the car To do this youll need to follow a few simple steps This process differs slightly depending on whether youre looking to connect a new key fob to an existing BMW or you are starting from scratch and do not have a working key The first step is to remove the working key fob and the ones you want to program inside your car making sure all doors and windows are closed Put the working key into the ignition and turn it quickly five times to position 1 and then back Dont start the car 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 be locked and unlock automatically Repeat this process to program each additional key fob Connecting your smartphone to your vehicle via Bluetooth is the last step Log in to the BMW Connected application Then tap the BMW Digital Key setup button This will activate the key on your smartphone and allow you to use it with the Digital Wallet app After youve completed these steps the BMW key fobs can then be used by other members of your Corona family or by your friends Our service department is ready to provide more advice and tricks to have a successful BMW driving experience There may be a need to change the battery in your BMWs key fob Its a simple process that you can complete at home To change the battery you just need to take off the key fob carefully remove the old battery and replace it with the new CR2032 This will return your keys and have you back on the road again in no time