HV battery

[alec21]

After locking car last night, woke up this morning to all four windows open, on checking car & putting power on to close them, it was showing HIV battery issue. Switched car off & on again, fault cleared. Any ideas?

 

[Alb]

Could be a problem with the 12V battery.

 

[Verdigris]

I've had a wet car a couple of times. You've probably done an inadvertent (pocket) long press on unlock, which opens all windows. Handy for cooling the car as you approach, in summer, but a pain if you do it in a rain-storm. The key fob has a surprising long range, so you may have done it whilst indoors.

 

[alec21]

Possible, key was in jeans pocket, inadvertently piled things on top last night.

 

[5teep]

Possible, key was in jeans pocket, inadvertently piled things on top last night.

You would not be the first to have that happen

 

[dragon2611]

Is this a feature only on the facelift?

I don't think holding the button on my pre-facelift opens the windows, although holding the middle one pops the boot which seems the most useless feature ever.

 

[emmrecs]

I don't think holding the button on my pre-facelift opens the windows

Try it! You do need to hold it down for some seconds (at least 3, I think) and all your car windows will open!

 

[dragon2611]

Try it! You do need to hold it down for some seconds (at least 3, I think) and all your car windows will open!

So it does, obviously never held it long enough before, also holding lock for the same amount of time closes them again.

 

[Bricktop X PWR]

Known as "Global Opening/Closing I think

 

[Alb]

This explains the windows but not the warning message.

 

[Gomev]

This explains the windows but not the warning message.

If the OP had not pressed the brake pedal but just put the power on it would show HV battery warning.

After locking car last night, woke up this morning to all four windows open, on checking car & putting power on to close them, it was showing HIV battery issue. Switched car off & on again, fault cleared. Any ideas?

 

[Alb]

There's an indication that the HV battery is not available on 12V power up but it isn't a warning because nothing is actually wrong. Perhaps we are being swayed by mention of terms like "issue" and "fault" when the car is working as designed?

 

[Gomev]

There's an indication that the HV battery is not available on 12V power up but it isn't a warning because nothing is actually wrong. Perhaps we are being swayed by mention of terms like "issue" and "fault" when the car is working as designed?

Indeed. Accurate information is always desirable otherwise we are all just guessing.

 

[dragon2611]

There's an indication that the HV battery is not available on 12V power up but it isn't a warning because nothing is actually wrong. Perhaps we are being swayed by mention of terms like "issue" and "fault" when the car is working as designed?

It doesn't really help the way the car chooses to display some of these message which makes it look very much like a warning/critical alarm.

The "Conditional speed limit detected" one is also a bug bear of mine.

 

[CarlThom]

After locking car last night, woke up this morning to all four windows open, on checking car & putting power on to close them, it was showing HIV battery issue. Switched car off & on again, fault cleared. Any ideas?

May sound silly but if you press the lock/unlock icon on the fob for a few seconds it will open all windows, or close them if already open. Could be that the fob was compressed all night on one of the icons causing the problem

 

[Steve Orton]

I've had a wet car a couple of times. You've probably done an inadvertent (pocket) long press on unlock, which opens all windows. Handy for cooling the car as you approach, in summer, but a pain if you do it in a rain-storm. The key fob has a surprising long range, so you may have done it whilst indoors.

I have unlocked my MG5 at a distance in excess of 80metres several times

 

[Verdigris]

I have unlocked my MG5 at a distance in excess of 80metres several times

That sound like the basis for a competition thread!

 

[Archev]

Curiosly it will have a better range if you press the button whilst holding the key fob against your cheek bone. I’m sure it was the antev-Christ Clarkson that first pointed this out.

 

[Gomev]

Curiosly it will have a better range if you press the button whilst holding the key fob against your cheek bone. I’m sure it was the antev-Christ Clarkson that first pointed this out.

I've used that technique several times in the past with other cars, pressed to the side of the forehead. It does increase range.