How to Fix Rolls Royce Dawn Key Fob Problems
Few cars can generate the kind of uncontrollable sigh that the Rolls-Royce Dawn can. Even with the roof made of cloth down, it's still stunning.
It has all the hallmark features - such as motorised doors that can close at the press of a button and umbrellas hidden in the door opening. It has an incredibly smooth V12 engine that can be driven in almost silence.
Dead Coin Battery
The most common reason for a key fob to not lock or unlock the doors is a dead coin battery. It is also the easiest to fix since it can be replaced in just a few moments. Make sure to use a new coin battery that is the same size, voltage, and specification as the original to avoid a faulty battery. Never use a battery exposed to clean water, like rain, tap-water that is clean, or even soda, as this can damage the internal chip. If the key fob still doesn't work, try reprogramming the key with an original key, or visit an authorized dealer.
Damage to the Receiver Module, water issues, Signal Interference and a damaged electronic chip are a few other reasons that the key fob might not work.
Poor Battery Contact
The button cell battery inside the key fob of your Rolls Royce Dawn can lose its charge and stop functioning. It is easy to replace the battery. But, ensure that you only replace it with a fresh battery with the same voltage and size. If you're unsure of what kind to buy, consult an employee at the local auto parts store.
Corrosion of the battery's terminals of the battery terminals in a Rolls Royce Dawn can also prevent it from starting. This is a typical issue with older batteries, particularly when they haven't been recharged for a long period of. Multimeters are a good tool for checking the conductivity to determine if the battery terminals have corrosion. Set the meter to ohms and connect one probe to the negative terminal in your Dawn. The other probe should be placed on a bare metal surface of the chassis or engine. The reading should be near zero ohms.
A click is another sign of a weak Dawn battery. This is because the starter solenoid and other accessories require high electric current, while the engine needs a low current to function. This means that the battery is unable to supply enough charge.
Water Damage
If you dropped your Rolls Royce Dawn key fob in the sink or left it sitting in the rain, it is likely suffering from water damage. Although the electronic chip inside is protected by rubber seals prolonged exposure to pure tap water or salty ocean water may cause it to stop functioning properly.
Over time the moisture in the air can cause corrosion, resulting in faulty circuitry that can lead to problems with the vehicle's security and ignition systems. It also can interfere with the transmission of signals, leading to the malfunction of remote keyless systems. The key fob may disable your car or activate the immobiliser, leaving you stuck.
To prevent this from to happen, remove the key fob and wipe it down with a damp cloth to dry out any remaining moisture. You can also put the key in a bag with uncooked silica gel or rice to absorb any moisture. Once dry the key should function normally again. If not, the issue is most likely with the 12 volt battery, or the receiver module, which will require reprogramming to fix.
Receiver Module Issues
If you've tried a new cell and the remote keyfob still does not function, then it may be time to replace your receiver module. This is the part that receives radio frequency signals from the key fob and transforms them into commands for your vehicle's electronic. If the chip in the module is damaged it will not be able to communicate with other modules of the vehicle. You'll need a scanner to identify the issue. It will show you what the computer in the vehicle is telling it.
The metal clips that hold the battery in the key fob that you use for your Dawn complete the circuit and keep it in position. These clips can corrode and make the battery contacts useless. When replacing the battery, make sure that it's exactly the same size and voltage as the original. Otherwise, it could damage the chip inside the key fob.
Water damage could be the reason behind the key fob suddenly stopped working. This could happen if the key fob is dropped in water or gets wet with soapy water. You can try cleaning the key fob with isopropyl alcohol or other electronic cleaners, but if you find that the chip inside the key fob has gone out of service, you'll need to replace it.
Signal Interference
Occasionally your Dawn key fob will stop working due to signal interference. The interference could be due to objects near your vehicle or weather conditions, or transmitters using the same frequency band. It could be caused by a faulty receiver module. If you are not able to cut down on interference, you might consider using an extender or signal booster.
If the battery for the button cell is completely depleted then it's time to replace it. The battery must be the same voltage, size and type as the original battery in order to ensure that your vehicle remains compatible with the key fob. If your key fob isn't working, the chip could be fried.
If you've tried the above suggestions but still aren't able to unlock your key or lock, it's likely time to call a professional locksmith. A reliable locksmith will be able to help you with any Rolls Royce key fob or key programming needs, including reprogramming and replacement. They will be able to offer a quote for the work needed. Ask the locksmith for their rates and credentials prior to hiring them.
Dead 12 Volt Batterie
The 12 volt battery in your Rolls Royce Dawn provides high current to start the engine and also for all accessories and onboard computers. If the battery is in a dead state, or the current flow to the engine is disrupted due to corrosion of the battery terminals or ground connection, all on-board electronics including the remote keyless system will stop working.
www.thekeylab.co.uk can be used to check the conductivity of your Dawn battery. To do this, remove the negative cable of the battery, and then connect one probe of the Multimeter to ground wire of the battery. Then, you can apply the other probe of the Multimeter to any exposed metal parts of your vehicle, like the chassis, body, or engine. The reading should be near zero Ohms.
If the results were not satisfactory then replace the battery with an alternative battery that has the same voltage, size and specification. Make sure that the new battery is fully charged prior to use it. The most common cause of a bad battery is internal degradation caused by the aging process, but it can also be a result of parasitic draw, or if the vehicle is in a garage for a long period of time.