IS 220D Engine ignition

[Joshleparker]

I left my Lexus IS220D parked for a couple of months and when ive come back to starting it up again the engine isnt starting and a whining/clicking noise is coming from the engine whilst the start button is being held down, i have a feeling its the starter motor but there wasnt an issue previously, does anyone have an idea of what it could be?

Any and all help is greatly appreciated 

[Herbie]

If there's a clicking noise then I'll almost guarantee that your Battery is flat.

As you press the start button, power is passed to the starter solenoid, which is basically an electromagnetic plunger-type switch. The Battery has enough power to energise the solenoid and pull in the contacts, but when those contacts meet and power flows to the starter motor, there isn't enough power to turn it and the voltage drops like a stone. As the solenoid releases the contacts the voltage rises high enough to energise the solenoid and the whole process just keeps repeating. It's commonly known as 'solenoid chatter' because of the ticking noise it makes as it pulls in and then immediately releases again.