McLaren 720s P14 Flat Battery Re Start Procedure *UN-OFFICIAL*
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- čas přidán 28. 08. 2019
- McLaren 720s
In this video I demonstrate the correct and incorrect way to access your 720s to recover from a discharged battery scenario.
There are two very important tools which aid with this process.
1) Lithium ion McLaren Charger
2) Emergency manual key tool
With aid from the battery charger, you shouldn't have to go through this process.
As your battery will be trickle charging, maintaining 100% State of Charge.
Once your car has experienced a drained battery. Lots of sporadic fault codes will be stored within different modules, so a full car check and code clear will be required.
Using McLaren Diagnostic System to carry out this service.
Thanks for watching!
Please note this is an UN-OFFICIAL HOW TO GUIDE
Specialist Technical Processes should always be followed - Please refer to owners handbook. - Auta a dopravní prostředky
Thank you for the helpful info our 675LT has a dead battery and McLaren service isn't working at the moment because of the coronavirus, so I will try and do it myself.
thank you for this! where do I find that key fob manual key tool?
Thanks for sharing this info. I am on my second 720S and did not know this info. I have never had a dead battery but this is good to know in case it ever happens.
Second what happened to the first
@@esthetics4512 It was traded in for a Spider.
@@dreamcarguy2159 do you like the Spider or coupe better having owned both? Any downside to convertible?
Thank you
Thank you🫶😍
Dude how did you get the battery cover off. I can’t figure it out.
You have to push in the release tab, whilst pulling the cover off.
It's difficult to remove the plastic cover fully, so pushing it up gives you ample room to attach a battery charger or jump pack.
I have a 650s... the battery is showing 0% but is fully charged [the trickle charger shows full].
The windows are dropped and the handbrake keeps coming on... I have had this before and MClaren wanted £400 to "clear the codes"
Any ideas please?
You'll find the IBS (Internal Battery Support) hasn't been realigned with the battery's state of charge.
This could be due to a faulty battery IBS system, or it could be a simple fix such as a 'hard reset'
In my experience, it is always best to visit a dealership to have these issues rectified - these batteries are very unique and although they may look like an average car battery, they are far from it.
Okay
Going buy a 720
jeremy brand good man! If you ever need further help or Servicing / diagnostics, please contact McLaren Bristol!
Perfect 👌🏼
if thats a li-ion battery you shouldn't be using a li-ion booster pack on it. 12v boost is recommended
Makes no difference.
Just be cautios, if the battery is faulty and has been stood for a very long period of time, then there is a possibility that the polarity may reverse which leads to the battery smoking as it shorts out.
Best practice, is to use a multimeter with the battery disconnected to see what the battery voltage is. If it is negative voltage, there is a high risk of shorting.
@@Time4trucks oh wow, good answer, i didn't know that. most Porsche cars have an advisory right at the boost terminals that says no li-ion boosting. i guess that is why, because of the polarity reversing.