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How to Programming a BMW Key Fob It is crucial that mechanics and locksmiths stay uptodate with the latest technology in automotive This includes key duplication and programming This will enable them to tackle complex problems like BMW key fob programming To program a new key begin by inserting the new key into the ignition and then turning it to position 1 The dash and accessory lights should come on What is an EEPROM The EEPROM chip is a nonvolatile memory that can be erased or reprogrammed It is 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 printers charge cards and even blood glucose monitors It is also used to keep data sequences that govern the microcontrollers operation as well as to offer a method of recovering from poweron reset conditions The basic EEPROM chip is comprised of two field effect transistors The floating gate is located on one side while the control gate is on the other When the device is powered by electrons they are released from the gate and they can be trapped in either a 0 or 1 state depending on how much voltage is applied The EEPROM can be read by monitoring the state of these transistors 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 1 In between these states no data is saved however it is still possible to write EEPROMs can be erased by the short duration of the voltage that is applied to the gate The EEPROM has the advantage that it can be erased and written to without the need for external circuitry This makes it a great choice in systems where memory must be updated frequently for example remote keyless system microcontrollers There are various types of memory chips that provide similar functionality but are more suitable for longterm storage Modern flash memory chips are used in digital cameras and computers They are used to store multimedia files for both longterm storage and retrieval Nevertheless they are not considered to be EEPROMs as their core functions are different from the functions of real EEPROMs EEPROMs are still extensively used however because of their versatility and capacity to store a minimal amount of data in a tiny space What is OBDII Up until recently most car manufacturers used their own diagnostic systems for diagnosing car problems In 1996 the government demanded that all vehicles have an established system for reading diagnostic codes This new system called OBDII uses the same port and diagnostic code system for all makes and models of automobiles sold in the US This means that any mechanic is able to quickly identify a problem in your car by plugging in the tool that is specifically designed for visit the following webpage II reads a variety of errors within the engine and other components using a standard diagnostic plug The information is then stored in the cars computer for later analysis This lets the system detect and repair any faults before they cause serious damage The mechanic can connect an OBDII scan tool to the port that will display error codes and inform where they originated Scan tools have a greater processing capacity than code readers and are able to read more 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 programming the ECU and offering performanceenhancing options These tools are usually employed by professionals in the field of automotive mechanics and are more expensive than standard code scanners When connecting a scan tool to the OBD II port it will recognize the protocol it is using and communicate with the vehicle using the appropriate pins There are many different protocols however the most wellknown ones are SAE J1850 PWM that is used in Ford and a few GM vehicles ISO 142304 KWP2000 that is utilized in a variety of European or Asian vehicles and CAN which is found on the majority of Americanmade cars Some scan tools tell you what the code means Others will give you the code and youll have to conduct some online research to determine what it means What is CAS Unit The CAS module is a BMW device that manages the antitheft system of the vehicle The system works by reading an encoded signal from the fob of the key and verifying it with the CAS module If the signal is valid the CAS module sends an enable signal to the engine control unit If not the signal is valid the engine wont begin BMW CAS module failures can result in a variety of symptoms such as key fob issues alarm activation central locking and dashboard warning lights If youre experiencing any of these symptoms you need to get the CAS module checked by a professional as quickly as possible The CAS system utilizes the BMW ICOM VCDS to communicate with the engine and other systems in the vehicle The VCDS is connected to the CAS using an extra cable that has a DIN connector on the other end The VCDS has several functions such as display of error codes as well as adjusting the ignition timing It also comes with a range of security features to protect the vehicle from theft BMW automobiles are equipped with a CAS key module in addition to the ICOM VCDS The CAS module does not use batteries and is powered by the ignition coil The key is equipped with a transponder chip that transmits the coded signal This signal is sent through loop antenna coil at the lock for ignition CasSystem implements the logic of CAS state This class has to be created on each instrument which needs to receive data Making multiple instances of this class can result in undesirable behavior CasSystem also manages alert messages in addition to providing state data It does this by publishing a casactivatealert subject that requires event data as an object that has key and priority properties This topic specifies both the ID of the alert youd like to activate and the priority level The CasSystem will issue an alert message on the topic of casalertdisplayed and casalerthidden topic defined by CasEvents It will also subscribe to the casmasterwarningactive and casmastercautionactive topics to consume their statuses How do you program the BMW Key BMW offers drivers in the Murrieta area with keyless entry Its a feature that lets you to lock and unlock your vehicle without having to use keys that are physically present However this keyless entry system can only be activated if the key fob is programmed to the vehicle Youll only need to follow some easy steps The process is slightly different dependent on whether youre pairing a brand new BMW key fob with an existing BMW or beginning from scratch without a working BMW key The first step is to take the working key fob as well as the ones youd like to program inside of your vehicle making sure that all windows and doors are closed Put the working key into the ignition and turn it quickly five times to position 1 then back Do not start the vehicle 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 to program each additional key fob Connecting your smartphone to your vehicle via Bluetooth is the final step Open the BMW Connected app and log in From there click 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 Once you have completed these steps the BMW key fobs can be used by other members of your Corona family or your family For drivers who need help our service department is always happy to offer more advice and tricks for the most successful BMW experience Changing the battery in your BMW key fob is yet another task you may have to complete at times Luckily this is a fairly easy task that can be accomplished at home To change the battery all you have to do is take off the key fob cover and carefully removing the battery that was in place and then replace it with a fresh CR2032 You will have your keys back and on the road in the blink of an eye