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How to Fix Rolls Royce Dawn Key Fob Problems There are very few automobiles that can generate the kind of involuntary gasp that the Rolls-Royce Dawn does. Even with the top of the cloth down it's a stunning car. It comes with all the standard features such as motorized doors that can be closed at the push of the button. Umbrellas are hidden in the openings of the doors. It has an incredibly smooth V12 engine that can be driven in complete silence. Dead Coin Battery A dead coin battery is the most common cause of a key fob that isn't locking or unlocking the doors. It is also among the simplest to fix because it can be replaced in just a few minutes. You should use a brand new coin battery that is the same size, voltage, and specifications as the original to avoid a faulty battery. Do not expose a battery to clean water, such as rain, clean tap water, or even soda, as this could damage the internal chip. If the key fob does not work after reprogramming it with an original key, go to an authorized dealer. Other reasons that the key fob might not be functioning include water damage, receiver Module Issues, Signal Interference or a Bad Electronic Chip. Contact with the Battery is Poor The button cell battery in the key fob that you use to access your Rolls Royce Dawn may lose its charge. It is simple to replace the battery. Make sure key rolls royce replace the battery with one of the same size and voltage. Contact the auto parts store if are unsure what type to purchase. The corrosion of the battery terminals of a Rolls Royce Dawn may also stop it from starting. This problem is common with older batteries, particularly in the event that they haven't been fully charged for a prolonged period of time. Multimeters are a good tool for assessing the conductivity of your battery to determine if the battery terminals have corrosion. Set the meter to ohms and touch one of its probes to the negative terminal of your Dawn. Place the other probe on a bare metal surface of the engine or chassis. The reading should be close to zero ohms. A clicking noise is another indicator of an insufficient Dawn battery. This is because starter solenoid, accessories and the engine require low voltage while the starter solenoid requires high current. Water Damage Water damage is likely to occur if you accidentally drop your Rolls Royce Dawn Key Fob in the sink, or leave it in the rain. Although the electronic chip inside is protected by rubber seals, prolonged exposure to clean tap water or even salty ocean water could cause it to stop working properly. Moisture can cause corrosion over time, leading to malfunctioning circuitry which could cause problems with the security and ignition system of your vehicle. It also can interfere with the transmission of signals, leading to the failure of remote keyless systems. The key fob could lock your vehicle or activate the immobiliser system, leaving you in a bind. To prevent this from happening, remove the key fob from its case and wipe it clean with a an abrasive towel to eliminate any moisture. You can also place the key in a bag containing uncooked silica gel or rice to absorb any moisture. Once dry the key should function normally again. If the key fails to work, it is likely that the 12 volt batteries or receiver modules are at fault. These need to be changed. Receiver Module Issues If you've already tried a new battery but the remote key fob still isn't working, it might be time to replace the receiver module. This is the component that receives radio frequency signals from the key fob and converts them into commands for the car's electronic. If the chip inside the module is damaged, it will not be capable of communicating with other modules in the vehicle. To determine the cause you'll need an OBD scanner to reveal what the onboard computer is telling it to do. The battery in the key fob of your Dawn includes metal retaining clips that keep it in place and complete the circuit. These clips are susceptible to corroding and make the battery's contacts ineffective. When replacing the battery, ensure that it is the exact same size and voltage as the original. It could damage the chip in the key fob. Water damage may be the reason behind an electronic key fob that suddenly stopped working. The key fob could be damaged by water if it is dropped in water or soaked in soapy water. You can try cleaning the key fob with isopropyl alcohol, or electronic cleaners, but if the chip in the key fob is fried, you'll need to replace it. Signal Interference Occasionally your Dawn key fob may cease to function due to signal interference. Interference can be caused by objects in the vicinity of your vehicle or weather conditions, as well as transmitters that operate on the same frequency band. A malfunctioning receiver module could also cause interference. If you're unable to eliminate the interference, you might be able to use a range extender or signal booster. It's important to replace the button cell battery on your Dawn key fob in the event that it's depleted. To ensure compatibility with your vehicle, the battery should have the same size and voltage as the original. If your key fob has stopped working, the chip could be damaged. If you've tried the previous suggestions but still aren't able to get your key to unlock or lock, it's likely time to call a professional locksmith. A reliable locksmith will be able help you with any Rolls Royce key fob or key programming needs, including the reprogramming and replacement. They'll be able to provide you with a price estimate for the work that is needed. Make sure you ask the locksmith about their fees and credentials prior to hiring them. Dead 12 Volt Battery The 12 volt battery in your Rolls Royce Dawn is responsible for providing high electrical current, not only to start the engine but also to supply power to all accessories as well as on-board computers. If this battery is dead or the flow of current to the engine is disrupted due to corrosion of the battery's terminals or ground connection, all on-board electronics including the remote keyless system will stop working. A multimeter can be used to check the conductivity of your Dawn battery. To do this you must disconnect the negative cable from the battery, and then connect one probe of the multimeter to the ground wire of the battery and the other probe to any exposed metal part of your vehicle's engine, body or chassis. The reading should be zero ohms or near it. If the results are not satisfactory you can replace the battery with another battery with the same voltage, size and specifications. Make sure that you fully charge the new battery before using it. The most common reason for a faulty battery is internal degeneration due to age. However, it could also be a result of parasitic draw or if your car has been in a garage for a long period of time.