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How to Programming a BMW Key Fob In the everevolving technology of automobiles it is crucial for locksmiths and mechanics alike to stay educated on key programming and duplication This will allow them to deal with complex issues like BMW key fob programming Start by inserting your working key into the ignition then turn the key to position 1 The dash and accessory lights should turn on What is an EEPROM The EEPROM chip is a nonvolatile memory that can be erased or changed It can be used to store a number of things such as the serial numbers as well as other unique information that is found in nearly 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 operation of microcontrollers as well as to offer a method of recovering from poweron reset situations The fundamental EEPROM chip has two field effect transistors The floating gate is on one side while the control gate is on the other When the device is turned on the electrons are released They may be held in a 0 state or a state of 1 based on the voltage applied The EEPROM can be read by determining the state of these transistors When the EEPROM state is 0 is the state it has no value If the EEPROM is in the 1 state it has a value of one Between these states no information is stored however it is still able to be written EEPROMs are erased with the short duration of the voltage applied to the gate The EEPROM has the advantage that it can be erased and written to without external circuitry This makes EEPROMs very useful for systems that require frequent updates to memory for remote microcontrollers for keyless systems However there are other memory chip models that provide similar functionality and are better suited for longterm storage and retrieval of large files Modern flash memory chips for example are extremely popular and are found in digital cameras These are used to store multimedia files for both longterm storage and retrieval Despite this they are not true EEPROMs and their primary functions differ from those of true EEPROMs EEPROMs are still widely used however due to their versatility and capacity 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 methods for diagnosing vehicle problems Then in 1996 the government demanded that all vehicles have an uniform system to read diagnostic codes The new system known as OBDII uses the same diagnostic code and port system for all models and models that are sold in the US This means that if you encounter an issue with your vehicle it will be easy for any mechanic to pinpoint what the issue is by plugging in a specialized tool The OBDII reads a variety of issues within the engine and other components using the standard diagnostic plug The information is saved in the computer of the car to be later analyzed This allows the system to detect and fix any issues before they cause major damage The mechanic can connect an OBDII scan tool to the port that will display error codes and inform where they came from Scanners have a higher computing capacity than codereaders and can read a wider variety of error codes They can also show live data graphs as well as record data to be later analyzed Certain tools are capable of performing more complex functions like changing the code of an ECU or supplying options to improve performance These highend tools are usually used by professional automotive technicians and are more expensive than standard code scanners When connecting a scan tool to the OBDII port it will detect the protocol it is using and then communicate with the vehicle by using the appropriate pins There are numerous protocols The most common include SAE J1850 KWP2000 used by Ford and certain GM cars ISO 142304 used in a variety of European and Asian vehicles and CAN Some scanners will provide you with the code means while others will just give you the code and will require an internet search to figure out what it means What is CAS unit The CAS unit is an BMW module that manages the antitheft system of the car The system works by reading a coded signal from the key fob and then verifying it using the CAS module If the signal is valid the CAS module transmits an enable signal to the engine control unit If the signal is not valid the engine will not start BMW CAS module malfunctions can cause a number of symptoms such as key fob issues central locking alarm activation and warning lights on the dashboard If youre experiencing any of these symptoms its important to have the CAS module inspected by a qualified technician as soon as you can spare bmw key 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 at the end The VCDS can perform a number of functions including displaying error codes or altering the timing of the ignition It also has a variety of security features that shield the vehicle from theft In addition to the ICOM VCDS BMW vehicles are equipped with a CAS component that is integrated into the key The CAS module is powered by the ignition coil and is not designed to work with batteries The key is embedded with a transponder chip that transmits the coded signal This is transmitted through a loop antenna coil at the ignition lock CasSystem implements the logic of CAS state This class has to be created on each device that requires data Creating multiple instances of this class could result in undesirable behavior In addition to providing information on state and information about state the CasSystem class also manages the display of alert messages To do this it generates a caactivatealert 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 wish to activate and its priority level The CasSystem will issue an alert message on the casalertdisplayed topic and the casalerthidden topics 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 keyless entry for drivers in the Murrieta region This convenient feature allows you to lock and unlock your car without keys that are physically present However this keyless entry system is only activated when the key fob is programmed to the vehicle To do this youll need to follow a few simple steps The procedure is slightly different depending on whether you are pairing a new BMW key fob to your existing BMW or starting from scratch without a working BMW key The first step is to get the working key fob as well as the ones you want to program inside your car making sure that all windows and doors are closed Insert the working key into the ignition and turn it to position one and return it quickly five times do not start the engine Turn the key back and then remove it With the key fob still in your pocket hold the unlock button as you press the lock button the BMW logo three times fast Then release the unlock button and the door locks should be locked and unlock automatically Repeat this procedure for each additional key fob that you wish to program The final step is to connect your smartphone to your vehicle via Bluetooth Start the BMW Connected app and log in From there tap the BMW Digital Key setup button This will enable you to use the key through the Digital Wallet App Once you have completed these steps your BMW key fobs can then be used by other members of your Corona family or by your friends Our service department is eager to offer more tips and tricks on how to have a successful BMW driving experience The battery replacement in your BMW key fob is another task you may have to do on occasion This is a simple task that you can do at home To replace the battery all you have to do is take off the cover for your key fob and carefully remove the old battery then replace it with a fresh CR2032 This will return your keys and have you back on the road again in no time