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How to Programming a BMW Key Fob In the constantly evolving world of automotive technology it is crucial for mechanics and locksmiths to be educated about key programming and duplication. This will help them to deal with complex issues such as BMW key fob programming. To program a new key begin by inserting the new key into the ignition and turning it to position 1. The dash and accessory lights should turn on. What is an EEPROM? The EEPROM is a non-volatile memory chip which can be erased and changed. It can be used to store various things, such as serial numbers and unique information in nearly every device connected to Ethernet. It is also the chip used in printers, charge cards and blood sugar monitors. It can also be used to store information that controls the operation of microcontrollers as well as a method to recover from power-on reset scenarios. The basic EEPROM chip is comprised of two field effect transistors. One has what is called floating gates, and the other is a control gate. When the device is powered up the electrons are released and can be trapped either in a 0 or a 1 state depending on the voltage applied. This transistor state can be used to read the EEPROM. If the EEPROM is in the “0” state it is in no use. If the EEPROM state is “1”, it has a 1 value. Between these states, no data is stored, however it can still be written. EEPROMs can be erased by an extremely short amount of the voltage applied to the gate. The benefit of EEPROM is that it can be written to and erased without any external circuitry. This makes EEPROMs extremely beneficial for systems that require frequent memory updates, such as remote keyless systems microcontrollers. There are various types of memory chips that offer similar functions, but are better suited to long-term storage. Modern flash memory chips, for example, are very popular and are used in computers as well as digital cameras. These are used to store multimedia files for long-term storage and retrieval. Nevertheless, they are not considered to be true EEPROMs as their core functions are different from those of true EEPROMs. However, EEPROMs continue be widely used because of their versatility and capacity to store small quantities of data in a small space. What is OBDII? In the past, many automobile manufacturers had their own diagnostic systems to identify car problems. Then in 1996, the government required that all cars use a standardized system for reading diagnostic codes. The new system, called OBD-II uses the same diagnostic code and port system for all makes and models sold in the US. This means that any mechanic is able to quickly identify a problem in your vehicle by plugging in the specific tool. The OBD-II system reads a wide variety of errors in the engine and other parts of the vehicle with an ordinary diagnostic connector. The information is stored in the computer of the car for later analysis. This lets the system detect and fix any issues before they cause serious damage. Mechanics can then connect to the OBD-II port using a scan tool, which displays all error codes and show the part of the system they originated from. Scanners have a higher computing capacity than code-readers and can read a larger variety of error codes. They can also show live data graphs and record data to be later analyzed. Some tools are able to perform more advanced functions such as programming the ECU and offering performance-enhancing options. These high-end tools are usually used by professional automotive technicians and are more expensive than standard 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 correct pins. There are many protocols. The most popular are SAE J1850 (KWP2000) which is used by Ford and some GM cars, ISO 14230-4, used in various European and Asian vehicles and CAN. Some scanners will provide you with the code means, whereas others will only give you the code and will require a bit of internet sleuthing to discover what it means. What is CAS Unit? The CAS module is a BMW module that manages the car's antitheft mechanism. The system works by analyzing the encoded signal on the fob of the key, and then confirming it with the CAS module. If the signal is valid it is then the CAS module sends an enable signal to the engine control unit. If it's not the signal is valid, the engine won't begin. BMW CAS module failures could result in a variety of symptoms like key fob malfunctions, central locking, alarm activation and warning lights on the dashboard. 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 utilizes the BMW ICOM VCDS to communicate with the engine and other systems in the vehicle. The VCDS connects to the CAS via a cable that is specially designed with a DIN connector at the end. The VCDS has several functions such as displaying error codes and changing the timing of the ignition. It also comes with a variety of security features to guard the vehicle from theft. BMW automobiles come 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. A transponder chip is integrated inside the key to transmit the signal that is coded to the CAS module. This signal is sent through loop antenna (coil) at the ignition lock. The CAS state logic is implemented in the CasSystem class. You must create one instance of this class on each instrument that requires data from CAS. Creating multiple instances of this class can result in undesired behavior. CasSystem also manages alert messages in addition to providing state data. It does this by publishing a ca_activate_alert subject that needs event data as an object with key and priority properties. The topic specifies the ID and optionally the suffix of the alert that you'd like to activate, as well as the priority level. After you've activated an alert, the CasSystem will broadcast an alert 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 do I program a BMW key BMW offers drivers in the Murrieta area with keyless entry, a feature that lets you to lock and unlock your car without using keys that are physically present. However the keyless entry feature can only be activated if the key fob is programmed to the vehicle. To accomplish this, you'll have to follow a few easy steps. The process is slightly different dependent on whether you're pairing a new BMW key fob with an existing BMW, or starting from scratch with no working BMW key. The first step is to put the working key fob in your car and the one you'd like to program. Be sure that all windows and doors are closed. Insert the working key into the ignition and turn it five times to position 1. then back. bmw key cutting start the car. Remove the key by turning it backwards. With the key fob still inside of your pocket, hold the unlock button while you press the lock button (the BMW logo) three times quickly. Release the unlock button, and the door locks will unlock and lock themselves. Repeat this procedure for each key fob. The final step is to connect 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 allow you to use the key through the Digital Wallet App. After you've completed these steps, the BMW key fobs are now able to be used by other members of your Corona family or friends. If you need assistance from a driver, our service department is always available to offer more advice and tricks to ensure an enjoyable BMW experience! Change the battery in your BMW key fob is a different task that you may need to complete at times. Luckily, this is an easy task that can be done at home. To change the battery, all you need to do is remove the cover on your key fob, carefully take off the old battery, then replace it with a new CR2032. You will have your keys back and be on the road in no time.