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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 cloth top down it's a stunning vehicle. It is equipped with all the classic features – such as motorised doors that shut at the press of a button, and umbrellas that are hidden inside the door's opening. It also comes with a silky smooth V12 engine that can be driven in near silence. Dead Coin Battery The most common reason for a key fob that does not lock or unlock the doors is a dead battery. It's also one of the most simple problems to fix since it can usually be replaced in just a few minutes. Make sure to use a new coin battery that is the same voltage, size and specifications as the first to avoid a damaged battery. Never use a battery exposed to clean water, such as rain, clean tap-water, or even soda, because this can damage the internal chip. If the key fob does not work after reprogramming it using an original key, visit an authorized dealer. Other reasons that the key fob may not be working include water damage, receiver Module Issues, Signal Interference or an Electronic Chip that is damaged. Contact with the battery is poor The button cell battery on the key fob that you use to access your Rolls Royce Dawn may lose its charge. Replacing the battery is a simple and easy fix. But, ensure that you only replace it with a brand new battery of the same size and voltage. If you're unsure of what kind to buy, ask the staff at the local auto parts store. The corrosion on the terminals of the battery in the battery terminals of a Rolls Royce Dawn may also prevent it from being able to start. This is a problem that occurs with older batteries, particularly if they haven’t been charged for a prolonged period of time. Multimeters are a good tool for assessing the conductivity of your battery to determine if the terminals on your battery have rust. Set the meter to ohms, and touch one of its probes to the negative terminal on your Dawn. Then, touch the other probe to a bare metal part of the engine or chassis. The reading should be close to zero ohms. Another indication of a weak battery in your Dawn is the sound that you hear when you attempt to start the engine. TheKeyLab is due to the starter solenoid, accessories and the engine require low current while the starter solenoid requires high current. Water Damage If you accidentally dropped your Rolls Royce Dawn key fob in the sink or left it sitting in the rain, it's probably suffering from water damage. While the chip inside is protected by rubber seals prolonged exposure to pure tap water or salty ocean water can cause it to stop working properly. Moisture can cause corrosion over time, leading to malfunctioning circuitry that can cause issues with the security and ignition system of your vehicle. It also can interfere with signal transmission, causing the remote keyless system to fail. The key fob can lock your vehicle or activate the immobiliser system, leaving you stranded. 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 the key is dry it should function as expected again. If not, the issue is most likely with the 12 volt battery or the receiver module, which will require reconfiguring to fix the issue. Receiver Module Issues If you've already tried a new battery but the remote key fob isn't working, it could be time to replace the receiver module. The receiver module receives radio frequency signals from your key fob and converts them to commands for the car's electronic system. If the chip inside the module is damaged the module won't be able to communicate with other modules of the vehicle. You'll need a scanner in order to diagnose the problem. It will reveal what the computer on the vehicle is telling it. The metal clips that secure the battery in the key fob of your Dawn complete the circuit and hold it in the right place. These clips are susceptible to corroding and make the battery's contacts ineffective. If you are replacing the battery, ensure that it's the exact size and voltage to the original one. It could damage the chip in the key fob. Water damage may be the cause of a key fob that suddenly stopped working. The key fob could be damaged by water if dropped into water or immersed in soapy water. It is possible to clean the keyfob with electronic cleaners or isopropylethanol but you will have to replace the chip if it is fried. Signal Interference Occasionally your Dawn key fob will stop working due to signal interference. Interference could be by objects that are near your car or weather conditions, as well as transmitters that operate on the same frequency band. A faulty receiver module can also cause interference. If you're unable to reduce the interference, you might consider using an extender or signal booster. It is essential to replace the button cell battery on your Dawn key fob if it is drained. To ensure compatibility with your vehicle, the battery should have the same voltage and size as the original. If your key fob isn't functioning, the chip could be damaged. If you've tried all of the above methods but are still unable to unlock your key or lock, it's likely time to call a professional locksmith. A reputable locksmith can help you with all your Rolls Royce key fob and key programming requirements. This includes reprogramming or replacement. They will be able to give you a quote for the work needed. Request the locksmith's rates and credentials prior to hiring them. Dead 12 Volt Battery The 12 volt Battery in your Rolls Royce Dawn provides high current to start the engine as well as for all accessories and onboard computers. This battery will not work in the event of a dead battery or if the flow of current is disrupted by corrosion of the terminals of the battery or the ground connection. To test the condition of your Dawn battery, you can perform the test of conductivity using a multimeter. To do this, take off the negative cable of the battery and touch one probe of the Multimeter to the ground wire of the battery. Then, apply the other probe of the Multimeter to any exposed metal parts of your vehicle, including the body, chassis, or engine. The reading should be zero ohms, or close to it. If the results aren't satisfactory If the results are not satisfactory, you can replace the battery with a fresh one of the same size, voltage and specifications. Make sure you fully charge the new battery prior to using it. The most frequent cause of an unreliable battery is internal degradation as a result of age. However, it can be caused by parasitic draw or if your car has been parked for a long time.