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How to Programming a BMW Key Fob Its vital that mechanics and locksmiths remain uptodate on the latest automotive technology This includes key duplication and programming This will allow them to tackle complex issues like BMW key fob programing Start by inserting your working key into the ignition and turning the key until it is in position 1 The dash and accessory lights should be on What is EEPROM The EEPROM chip is a nonvolatile memory that can be erased or modified It can be used to store various things such as serial numbers and other unique information in virtually any device connected to Ethernet It is the chip used in charge cards and printers as well as blood sugar monitors It can be used to store data that regulates microcontrollers operation as well as a way to recover from poweron reset situations The fundamental 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 up the electrons are released and can be trapped either in a 0 or a state of 1 based on the voltage applied This transistor state can be used to read the EEPROM If the EEPROM state is 0 it is in no use If the EEPROM state is 1 is the case it has a value of 1 In between these states no information is stored but it is still possible to write EEPROMs are erased with a short time of voltage applied to the gate The EEPROM is advantageous because it can be erased and written to without external circuitry This makes it very useful in systems where the memory needs to be regularly updated like remote keyless microcontrollers in systems There are other types of memory chips which have similar functionality but are better suited for longterm storage Modern flash memory chips for example are very popular and are found in digital cameras These are used to store multimedia files for both longterm storage and retrieval Despite this they arent EEPROMs and their core functions differ from those of real EEPROMs EEPROMs are still widely used however because of their versatility and the ability to store a minimal amount of data in a limited space What is OBDII Prior to recently the majority of car manufacturers relied on their own diagnostic systems to diagnose issues with their vehicles In 1996 the government ordered that all vehicles utilize a standard system for reading diagnostic code This new system known as OBDII uses the same port and diagnostic code system for all makes and models of vehicles sold in the US This means that any mechanic can quickly diagnose a problem with your vehicle by plugging it into the special tool The OBDII system can detect a variety of issues in the engine and other parts of the vehicle with the standard diagnostic connector The information is saved in the cars computer for later analysis This allows the system to identify and fix any issues before they cause significant damage The mechanic can connect an OBDII scan tool to the port that will display error codes and tell them where they came from Scan tools have more computing capacity than code readers and can read more error codes They can also show live data graphs and save data for later analysis Some tools can even perform more advanced functions such as programming the ECU and supplying performanceenhancing options These tools are employed by professional auto technicians and are usually more expensive than scanners for simple tasks When connecting a scan tool to the OBD II port it will recognize the protocol it is using and then communicate with the vehicle using the appropriate pins There are numerous protocols The most popular are SAE J1850 KWP2000 used by Ford and some GM cars ISO 142304 used in a variety of European and Asian vehicles and CAN Certain scan tools will tell you what the code is referring to Others will just give you the code and youll have to do some internet research to find out what it means What is CAS unit The CAS module is a BMW unit that controls the antitheft system of the car The system works by reading the encoded signal on the key fob and verifying it using the CAS module The CAS module will transmit an enable signal to engine control unit if the signal is valid If not the engine wont start A BMW CAS module failure can lead to a variety of symptoms including key fob not working problems and alarm activation issues central locking issues and warning lights appearing on the dashboard If youre experiencing any of these symptoms its crucial to get the CAS module checked by a professional as soon as you can The CAS system uses the BMW ICOM VCDS to communicate with the engine and other systems in the vehicle The VCDS is connected to the CAS by an extra cable that has an DIN connector on the other end The VCDS can perform a number of functions like display of error codes or even changing the timing of the ignition It also offers a variety of security features to protect the vehicle from theft BMW automobiles are equipped with an CAS key module in addition to the ICOM VCDS The CAS 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 is transmitted via an antenna coil loop at the ignition lock CasSystem implements the logic of CAS state This class should be installed on every device that requires data The creation of multiple instances of this class could result in undesired behavior CasSystem also manages alert messages in addition to providing state information It does this by releasing 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 you want to activate and its priority level Once youve activated the alert the CasSystem will display an alert message on the casalertdisplayed as well as the casalert 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 those living in the Murrieta region This convenient feature allows you to lock and unlock your car without the physical key The keyless entry system can only activated when the key fob is programmed to the car To do this youll have to follow a few easy steps This process differs slightly depending on whether youre looking to pair a new key fob to an existing BMW or you are beginning from scratch and dont have a working key The first step is to insert the working key fob into your car and the one youd like to program Make sure that all the windows and doors are closed Insert the working key into the ignition and turn it to one position then back rapidly five times do not start the engine Take the key out by turning it backwards Hold the unlock button while pressing the lock button the BMW Logo three times in a row Release the unlock button and the door locks will unlock and lock themselves Repeat this procedure for each additional key fob you want to program Connecting your smartphone to your vehicle using Bluetooth is the last step Open the BMW Connected app and log in From there replacement keys for bmw This will activate the key in your smartphone and allow you to use it in conjunction with the Digital Wallet app After 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 available to provide more tips and tricks to ensure an enjoyable BMW experience Change the battery in the battery of your BMW key fob is yet another task that you may need to complete at times Fortunately its an easy task that can be accomplished at home To change the battery you simply need to remove the key fob carefully take off the battery that is old and replace it with the new CR2032 The keys will be back and on the road in just a few minutes