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How to Programming a BMW Key Fob In the ever-evolving world of automotive technology it is essential for locksmiths and mechanics alike to be educated about key programming and duplication. This will enable them to tackle complex issues like BMW key fob programing. Begin by putting your working key into the ignition and then turning the key to position 1. The accessories and dash lights should turn on. What is EEPROM? The EEPROM chip is a nonvolatile memory which can be erased or modified. It is used to store a number of things, including serial numbers and other unique information in virtually everything connected to Ethernet as well as the chip that is used in printers, charge cards and even blood glucose monitors. It can also be used to store data that controls the microcontroller's operation as well as a way to recover from power-on reset situations. The fundamental EEPROM chip contains two field effect transistors. One of them is a floating gate, and the other is a control gate. When the device is powered by electrons, they are released from the gate and can be trapped in either a 0 or 1 state dependent on the voltage that is applied. This transistor state can be used to read the EEPROM. When the EEPROM is in the “0” state, it has no value. If the EEPROM state is “1” is the case, it has a value of 1. Between these states, no data is saved, however, it is still possible to write. EEPROMs can be erased using a short time of the voltage applied to the gate. The advantage of the EEPROM is that it can be erased and written into 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 different types of memory chips that provide similar capabilities and are more suitable for long-term storage and retrieval of large files. Modern flash memory chips are popular in digital cameras and computers. These are often used to store multimedia files that are intended to be used for short-term as well as long-term storage and retrieval. However, they're not considered to be true EEPROMs, and their core functions are different from those of true EEPROMs. EEPROMs are still extensively used, but because of their versatility and the ability to store a minimal amount of data in a tiny space. What is OBDII? Prior to recently, the majority of car manufacturers used their own diagnostic systems to identify issues with their vehicles. Then in 1996, the government mandated that all cars have a standardized system for reading diagnostic codes. This new system, called OBD-II is based on the same port and diagnostic code system for all models and makes of automobiles sold in the US. This means that if you encounter problems with your car, it will be easy for any mechanic to pinpoint the cause by plugging in a specific tool. The OBD-II system detects a range of faults in the engine as well as other parts of the vehicle by using the standard diagnostic connector. The information is then stored in the car's computer system for later analysis. The system can then detect and fix any issues before damaging the car in a significant way. The mechanic can connect an OBD-II scan tool to the port, which will display the error codes and indicate where they originated. Scanners have a higher computing power than code-readers and can read a wider variety of error codes. They can also show live data graphs and save data to be later analyzed. Some tools are able to perform more complex functions, such as programming the ECU and offering performance-enhancing options. These higher-end tools are typically used by professional automotive technicians and are more expensive than simple code scanners. When you connect a scanner tool to an OBD-II connector, it will detect the protocol and communicate with the vehicle by using the appropriate pins. There are many protocols. The most popular are SAE J1850 (KWP2000) which is used by Ford and certain GM cars, ISO 14230-4, used in a variety of European and Asian vehicles, and CAN. Some scanners will provide you with the code actually 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 module is an BMW module that regulates the antitheft system of the car. The system works by reading an encoded signal from the key fob and verifying it with the CAS module. The CAS module will send an enable signal to the engine control unit if the signal is valid. If the signal is invalid the engine won't start. BMW CAS module failures could cause a variety of issues like key fob malfunctions and central locking, alarm activation and dashboard warning lights. If you notice any of these symptoms, make sure you have the CAS Module checked immediately by an expert. 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 using a special cable with an DIN connector on the other end. The VCDS can perform a variety of functions such as display of error codes, as well as changing the timing of the ignition. It also comes with a variety of security features that protect the car from theft. In addition to the ICOM VCDS, BMW vehicles are equipped with a CAS module that is integrated into the key. The CAS module doesn't use batteries and is powered by the ignition coil. A transponder chip is embedded in the key to transmit the signal that is coded to the CAS module. This is transmitted through loop antenna (coil) at the ignition lock. The CAS state logic is implemented by the CasSystem class. You should create one instance of this class on every instrument that requires data from CAS. bmw keys of multiple instances of this class may result in undesired behavior. CasSystem also manages alert messages, in addition to providing state information. It does this by publishing a cas_activate_alert subject that needs event data as an object that has key and priority properties. The topic specifies the ID and optionally the suffix of the alert you wish to activate, along with the priority level. The CasSystem will send an alert message on the topic cas_alert_displayed and cas_alert_hidden topic (defined by CasEvents). It will also subscribe to the cas_master_warning_active and cas_master_caution_active topics to consume their statuses. How do you program a BMW key BMW offers keyless entry for drivers in the Murrieta region. This feature makes it possible for you to lock and unlock your car without the use of the physical key. However this keyless entry system is only activated when the key fob is programmed to the vehicle. You'll need to follow some easy steps. The procedure may differ depending on whether you're pairing a brand new BMW key fob to your existing BMW or if you are starting from scratch without a working BMW key. The first step is to take the key fob that is working and the ones you wish to program inside your vehicle, making sure all doors and windows are closed. Put the working key into the ignition and turn it quickly five times to position 1. then back. Don't start the vehicle. Reverse the key and remove it. Hold the unlock button while pressing 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 you wish to program. The final step is connecting your smart phone to your vehicle using Bluetooth. Launch the BMW Connected app and log in. Then, tap the BMW Digital Key setup button. This will activate the key in your smartphone and allow you to use it using the Digital Wallet app. Once you've completed the steps, you'll be able to ensure that your BMW key fobs are now ready to be used by the other members of your family and your friends during their Corona commutes. Our service department is happy to provide more advice and tricks to enjoy a successful BMW driving experience. It is also possible to change the battery in your BMW's key fob. Luckily, this is an simple job that can be done at home. To change the battery, all you have to do is take off the cover on your key fob and then carefully remove the old battery, and then replace it with a fresh CR2032. This will allow you to get back your keys and have you back to your destination in no time!