Switch ignition on (engine off) 2. Pull and release high beam 5 times. 3. Press and release brake pedal 3 times. 4. If successful the battery light will flash 3 times within the next 15 seconds ( I don't see this, infact there is no battery Icon, I see engine Icon only ) 5. BMS reset completed. UK/Ireland Location: Devon. Posted June 20, 2012. Put key in ignition and turn from 0 to II four times in ten seconds. There will usually be a beep, tone or the immobiliser light will come on solid but this is not guaranteed to happen. Press any button on the fob and you should get a beep/tonr to acknowledge the fob. The transmitter should operate normally." I assume S-Max will be the same. Be very careful to install the battery correctly, normally + downwards, and if possible, test it with a multimeter to ensure it is giving 3.3v before installation. As Dave says, use quality branded batteries from a reputable seller. To reset key battery change message: I found the solution that worked for me was to hold the unlock button down and press the start button without foot on clutch. Unrecognised key message comes up. Turn the ignition off. Release the unlock button on the key and re-press the ignition on. See how to replace the battery in your 2012 - 2017 #Ford #Focus #key #fob keyless entry remote.FCCID: M3N5WY8609 - Order Here: *The FordPass App, compatible with select smartphone platforms, is available through a free download. Message and data rates may apply. ** FordPass Connect (optional on select vehicles), the FordPass App, and Complimentary Connected Services are required for remote features (see FordPass Terms for details). Most Ranger key fobs are equipped with Lock, Unlock, Panic and Go buttons. However, there may be variations depending on when the key fob was made. A popular feature among Ford Ranger owners is the remote start. It works when you hit the locks and press the 2X button twice. Press the 2X button twice again to turn off your engine. With only one (1) fob near the vehicle, start the engine. With the engine running, press the Lock or Unlock button on the key fob one time. Repeat this procedure with all additional affected key fobs. When the vehicle properly samples the new key battery level the message will no longer be present. Urhu.