V70 D5 open the bonnet warning on dashboard - Page 2

thiscocks · Aug 13th, 2020, 11:17

Quote:

Originally Posted by Bashy

Looks liek the right part BUT!!!! i wouldn't bother, it is the most fiddlyiesteder job in the universe, I got the part to do mine and then gave up half way through and just did the hack....

Really? Yes the location looks a pain, I guess it's front bumper off?

FreshAir · Aug 13th, 2020, 17:14

I wouldn't say that WD-40 is a good lubricant for anything.

It has an effect whilst still wet/liquid, but once it dries it will have almost no lubricating properties. It's good for cleaning things though.

Best use something else after WD-40 for long term lubrication.

I've used ACF-50, but there are other lubricants that will work. I'm hoping it has solved my issue, time will tell.

Tatsfield · Aug 13th, 2020, 22:32

The WD-40 variant I used because it was on the shelf was the one with added silicone in it. While silicone is very bad for electronic systems, the switch is a simple microswitch and the problem was corrosion or contamination of the mechanical operating lever so the penetrating properties of the WD-40 worked the fluid into the mechanism and the silicone stayed there after the hydrocarbons evaporated and left a little lubrication to allow the operating lever to move. That was two years ago and I haven't had any trouble with it since.

Martin Cox · Aug 13th, 2020, 23:38

I had the same problem and a squirt or two of contact cleaner sorted it out for over a year. however the problem has resurfaced and has failed to respond to further treatment.

Changing the switch appears to be a pig of a job unless you're a left handed gynaecologist with X-ray vision, so I too have bypassed the switch.

in over 40 years of driving I have never had a bonnet come open when it shouldn't have done and on all modern cars opening the bonnet is a two stage affair so the risk is minimal.

However I understand that this microswitch also tells the alarm system the bonnet is closed so if it's been bypassed it can no longer trigger the alarm if the bonnet is prised open.

Personally, this is fairly well down my list of things to worry about.

Martin

2008 V70 2.4D Auto 117,000 miles

Aug 13th, 2020, 22:32	#13
Tatsfield Premier Member Last Online: Apr 13th, 2024 22:52 Join Date: Nov 2015 Location: Poole	The WD-40 variant I used because it was on the shelf was the one with added silicone in it. While silicone is very bad for electronic systems, the switch is a simple microswitch and the problem was corrosion or contamination of the mechanical operating lever so the penetrating properties of the WD-40 worked the fluid into the mechanism and the silicone stayed there after the hydrocarbons evaporated and left a little lubrication to allow the operating lever to move. That was two years ago and I haven't had any trouble with it since. __________________ 2012 XC70 SE Lux Polestar 230 bhp D5 Auto Oyster Grey

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Aug 13th, 2020, 17:14	#12
FreshAir Senior Member Last Online: Yesterday 09:42 Join Date: Feb 2014 Location: Lichfield	I wouldn't say that WD-40 is a good lubricant for anything. It has an effect whilst still wet/liquid, but once it dries it will have almost no lubricating properties. It's good for cleaning things though. Best use something else after WD-40 for long term lubrication. I've used ACF-50, but there are other lubricants that will work. I'm hoping it has solved my issue, time will tell.

Aug 13th, 2020, 23:38	#14
Martin Cox VOC Member Last Online: Today 06:43 Join Date: Dec 2001 Location: Hull	I had the same problem and a squirt or two of contact cleaner sorted it out for over a year. however the problem has resurfaced and has failed to respond to further treatment. Changing the switch appears to be a pig of a job unless you're a left handed gynaecologist with X-ray vision, so I too have bypassed the switch. in over 40 years of driving I have never had a bonnet come open when it shouldn't have done and on all modern cars opening the bonnet is a two stage affair so the risk is minimal. However I understand that this microswitch also tells the alarm system the bonnet is closed so if it's been bypassed it can no longer trigger the alarm if the bonnet is prised open. Personally, this is fairly well down my list of things to worry about. Martin 2008 V70 2.4D Auto 117,000 miles

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