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How to Programming a BMW Key Fob In the ever-changing technological world of automotive technology it is crucial for mechanics and locksmiths to be educated about key programming and duplication. This will allow them to tackle complex issues 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 turn on. What is an EEPROM? The EEPROM is an inert memory chip that can be erased and programmed. It can be used to store a variety of things, like serial numbers and other unique information, in almost every device connected to Ethernet. It is also the chip found in printers and charge cards, and even blood sugar monitors. It can also be used to store data that regulates the microcontroller's operation as well as a way to recover from power-on resets. The fundamental EEPROM chip is comprised of two field effect transistors. One of them is floating gates, and the other is a control gate. When the device is powered, electrons are released from the gate, and they can be trapped in either one or zero state dependent on the voltage that is applied. This transistor state can be used to read the EEPROM. If the EEPROM is in the “0” state, it has no value. When the EEPROM is in the “1” state it has a value of one. In between these states, no information is stored, but it is still possible to write. EEPROMs are erased with the short duration of the voltage applied to the gate. The benefit of EEPROM is that it can be erased and written into without any external circuitry. This makes EEPROMs extremely useful for systems that require frequent memory updates like remote keyless systems microcontrollers. However there are different memory chip models that provide similar functionality and are better suited for long-term storage and retrieval of large files. Modern flash memory chips are used in computers and digital cameras. These are often used to store multimedia files intended for both short-term and long-term storage and retrieval. However, they aren't considered to be EEPROMs as their core functions differ from the functions of real EEPROMs. replacement bmw keys are still widely utilized, however, due to their versatility and capacity to store a minimal amount of data in a limited space. What is OBDII? Up until recently, most car manufacturers used their own diagnostic systems to diagnose car problems. Then in 1996, the government demanded that all cars have a standardized system to read diagnostic codes. This new system called OBD-II uses the same diagnostic code and port system for all brands and models that are sold in the US. This means that any mechanic is able to quickly diagnose a problem with your vehicle by plugging it into the specific tool. The OBD-II detects a variety of problems within the engine as well as other components using an ordinary diagnostic plug. The information is stored in the car's computer to be later analysed. This allows the system to detect and repair faults before they cause serious damage. Technicians are able to connect to the OBD-II port with a scan tool, which will show the error codes in all their entirety and indicate which part of the system they come from. Scan tools have a greater computing power than code readers and are able to read more error codes. They can also display live data graphs as well as record data to be later analyzed. Some tools are capable performing more complex functions, such as reprogramming an ECU or providing enhancement options for performance. These tools are used by professional auto technicians and are generally more expensive than scanners that are merely scanning. When you connect a scan tool to an OBD II connector, it will detect the protocol and communicate with the vehicle using the appropriate pins. There are numerous protocols however the most well-known ones are SAE J1850, which is used in Ford and a few GM vehicles, ISO 14230-4 (KWP2000) that is used in a variety of European or Asian vehicles and CAN, which is found on most US-made vehicles. Certain scan tools can provide you with the code means, whereas others will just give you the code, and require a bit of internet sleuthing to figure out what it means. What is a CAS unit? The CAS unit is an BMW module that controls the car's antitheft system. 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 will send an enable signal to the engine control unit. If the signal is not valid the engine won't begin. BMW CAS module malfunctions can cause a variety of issues such as key fob issues, alarm activation, central locking, and dashboard warning lights. If you're experiencing any of these symptoms, you need to inspect the CAS module by a professional as soon as possible. The CAS system communicates to the vehicle's engine and other systems via the BMW ICOM VCDS. The VCDS is connected to the CAS using a special cable with an DIN connector on the other end. The VCDS is a multi-purpose device that include displaying error codes and changing the timing of the ignition. It also has a variety of security features that protect the vehicle from theft. In addition to the ICOM VCDS, BMW vehicles are equipped with a CAS module which is integrated into the key. The 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 encoded signal 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. Creating multiple instances of this class may result in undesired behavior. In addition to providing information about state, the CasSystem class also controls the display of alert messages. To do so, it publishes a cas_activate_alert topic that needs event data in the form of an object with the key and priority properties. This topic contains the ID and, optionally, the suffix of the alert that you want to activate, along with its priority level. Once you've activated an alert it will be displayed on the CasSystem will display a message for it on the cas_alert_displayed as well as the cas_alert event bus topics (defined by the CasEvents interface). It will also subscribe to the cas_master_warning_active and cas_master_caution_active topics to consume their statuses. How to program a BMW key BMW offers drivers in the Murrieta area with keyless entry, a feature that lets you to lock and unlock your vehicle without the need for keys that are physically present. This keyless entry system is only activated once the key fob has been programmed to the car. To do this, you'll need to follow a few easy steps. The process varies slightly depending on whether you want to pair a new key fob with your existing BMW or you are starting from scratch and don't have a working key. The first step is to insert the working key fob in your vehicle, along with the one you wish to program. Make sure all the windows and doors are closed. Insert the working key into the ignition, turning it to the first position and return it quickly five times (do not start the engine). Turn the key back again and then take it out. Hold the unlock button while pressing the lock button (the BMW Logo) three times fast. Then, release the unlock button, and the door locks will lock and unlock automatically. Repeat this process to program each additional key fob. Connecting your smartphone to your vehicle via Bluetooth is the final step. Log in to the BMW Connected application. The BMW Digital Key setup button will be displayed. This will activate the key on your smartphone and allow you to use it using 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 friends. Our service department is eager to give you more tips and tricks on how to enjoy a successful BMW driving experience. Change the battery in your BMW key fob is yet another task that you may need to do on occasion. Luckily, this is a fairly simple task that can be accomplished at home. To change the battery all you have to do is take off the cover on your key fob and carefully take off the old battery, then replace it with a brand new CR2032. This will give you back your keys and get you to your destination in no time!