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How to Programming a BMW Key Fob In the everevolving technology of automobiles its important for mechanics and locksmiths to stay educated on key programming and duplication This will help them tackle complex issues like BMW key fob programming Begin by putting your working key into the ignition and turning the key until it is in position 1 The dash and accessories lights should be on What is an EEPROM The EEPROM is a nonvolatile memory chip which can be erased and changed It can be used to store many things like serial numbers and other unique information in almost any device connected to Ethernet It is also the chip that is found in printers and charge cards as well as blood sugar monitors It can be used to store data that controls the operation of microcontrollers as well as a way to recover from poweron reset scenarios The basic EEPROM chip has two field effect transistors One of them is a floating gate and the other is a control gate When the device is turned on the electrons are released and may be held in a 0 state or a 1 state based on the voltage applied This transistor state can be used to read the EEPROM If the EEPROM is in the 0 state it has no value If the EEPROM is in the 1 state it has a value of 1 In between these states there is no stored data however it is possible to write to The EEPROM can also be erased using a specific voltage to the gate for a short period of time The benefit of EEPROM is that it can be erased and written to without any external circuitry This makes EEPROMs extremely beneficial for systems which require frequent memory updates for remote microcontrollers for keyless systems However there are other types of memory chips that provide similar capabilities and are better suited for longterm storage and retrieval of large files Modern flash memory chips are a common feature in digital cameras and computers These are used to store multimedia files for both longterm storage and retrieval But they are not true EEPROMs and their fundamental functions differ from those of real EEPROMs However EEPROMs continue to be used extensively due to their versatility and their ability to store minimal quantities of data in a limited space What is OBDII Prior to recently the majority of automobile manufacturers had their own diagnostic systems to identify issues with their vehicles In 1996 the government demanded that all cars have an established system for reading diagnostic codes This new system called OBDII uses the same diagnostic code and port system for all makes and models that are sold in the US This means that any mechanic is able to quickly identify a problem in your car by plugging in the specific tool The OBDII system reads a wide range of faults in the engine as well as other parts of the vehicle by using the standard diagnostic connector The information is stored in the cars computer for further analysis This allows the system to detect and fix any issues before they cause major damage Technicians can connect to the OBDII port with a scan tool which will display all error codes and indicate which part of the system they came from Scanners have a higher computing power than codereaders and are able to read a greater variety of error codes They can also display live data graphs and save data for later analysis Some tools can even perform advanced functions like reprogramming the ECU and providing performance enhancing options These highend tools are usually employed by professionals in the field of automotive mechanics and are more expensive than basic code scanners When you connect a scanner tool to an OBDII connector it will recognize the protocol and communicate with the vehicle using the appropriate pins There are many different protocols that are used but the most popular ones include SAE J1850 PWM which is used in Ford and a few GM vehicles ISO 142304 KWP2000 which is utilized in a variety of European or Asian vehicles and CAN which is used in the majority of Americanmade vehicles Some scan tools tell you exactly what the code means Others will simply give you the code and you will need to do some internet research to determine what it means What is CAS Unit The CAS module is a BMW unit that manages the antitheft system of the vehicle The system works by reading the coded signal on the fob of the key and 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 its not the engine wont start A BMW CAS module failure can cause a variety of signs including key fob not working problems and alarm activation issues central locking issues and warning lights on the dashboard If youre experiencing any of these symptoms you need to have the CAS module inspected by a qualified technician as soon as possible 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 via an extra cable that has a DIN connector on the other end bmw car key replacement is able to perform a variety of functions including showing error codes or changing the timing of the ignition It also offers a variety of security features to protect the vehicle from theft BMW vehicles come with an CAS key module in addition to the ICOM VCDS The CAS module does not use batteries and is powered by the ignition coil A transponder chip is integrated in the key to send the coded signal to the CAS module The signal is transmitted through a coil antenna loop at the ignition lock The CAS state logic is implemented in the CasSystem class This class has to be installed on every device that requires data Multiple instances of this class may result in undesirable behavior CasSystem also manages alert messages in addition to providing state data To do this it publishes a casactivatealert topic that needs event data in the form of an object with the key and priority properties The topic contains the ID and optionally the suffix of the alert that you wish to activate as well as the priority level The CasSystem will publish an alert message on the topic casalertdisplayed and the hidden topic defined by CasEvents It will also subscribe to the casmasterwarningactive and casmastercautionactive 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 vehicle without the need for a physical key This keyless entry system only activated after the key fob has been programmed to the car Youll only need to follow two easy steps The procedure varies slightly based on whether you want to connect a new key fob to your existing BMW or you are beginning from scratch and dont have a working key First you need to insert the working key fob in your vehicle and then insert the one you wish to program Make sure that all the doors and windows are shut Insert the working key into the ignition turning it to position one and back rapidly 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 while 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 procedure for each additional key fob Connecting your smartphone to your vehicle using Bluetooth is the last step Start the BMW Connected app and log in The BMW Digital Key setup button will appear This will enable you to use the key using the Digital Wallet App Once youve completed these steps your BMW key fobs are now ready to be used by the other members of your family as well as your friends during their Corona commutes If you need assistance from a driver our service department is always happy to offer more advice and tricks to ensure an enjoyable BMW experience The battery replacement in the battery of your BMW key fob is another task you may have to perform at times This is a simple job that you can complete at home To replace the battery you only need to remove the key fob then remove the older battery and replace it with the new CR2032 This will give you back your keys and have you back on the road again in no time