Warning message - bonnet open

[productpeter]

Where is the sensor that checks for bonnet closure?
I have an intermittent Warning Message coming up that says the Bonnet is Open when it clearly is not. A reasonably intense look around the under bonnet area does not reveal any potential sensor.
So where is it?

[adambsmith]

Not sure - I had the same issue - necessitated a trip to the dealer unfortunately. Seems to be fairly common too.

[andymcp]

Likewise, trip to dealer. If it happens when you've locked the car it triggers the alarm. Not popular with neighbours!

[tem]

Originally Posted by productpeter

Where is the sensor that checks for bonnet closure?
I have an intermittent Warning Message coming up that says the Bonnet is Open when it clearly is not. A reasonably intense look around the under bonnet area does not reveal any potential sensor.
So where is it?

If I remember correctly, the unit that triggers the bonnet open alarm is located under the off side (right) bonnet lock mechanism.
I got the alarm on my first V60 and traced the fault to a loose wire connector.
You have not mentioned which model of Volvo that you have the problem with?

If you slam the bonnet shut, vibration can work the connector loose.
Better to close the bonnet by lowering and finally, using palms of both hands, push it into the closed position.

tem.

[productpeter]

My car is an XC60. Thanks for the comments. Just looked at the offside (and nearside) catches - no sign of any sensors or switches through the latch holes. These holes are not large and there is no other easily removed part - Bumper ?? So took off grill, broke lower catches, no other visible signs of wires etc. Note - only prise plastic catches in warm weather when the plastic is more pliable.

[tem]

Had a look today at my V60 and can confirm the Bonnet Open/Closed module is situated below the right hand Bonnet Lock/Latch.

The attached photo was taken of the connector for the module using a mirror, as I could not get the camera into a position to see what I was doing.
Hence the poor quality.

http://www.volvoforums.org.uk/attach...1&d=1456753772

tem.

[productpeter]

Originally Posted by tem

Had a look today at my V60 and can confirm the Bonnet Open/Closed module is situated below the right hand Bonnet Lock/Latch.

The attached photo was taken of the connector for the module using a mirror, as I could not get the camera into a position to see what I was doing.
Hence the poor quality.

http://www.volvoforums.org.uk/attach...1&d=1456753772

tem.

Thanks to you for your comments and the Picture. However my 2010 D3 doesn't have anywhere that looks like that, even in a mirror. No wire anywhere near the two latches.
So far since poking around and closing the bonnet gently it has mostly behaved itself. Nevertheless I would like to know how it senses closure.

[Cazg]

ProductPeter have you managed to resolve this without going to Volvo?

I had the same thing flash up on my D5 XC60 on Friday whilst driving on the motorway. Ended up driving home after twice pulling over to make sure it wasn't open. When I got home and switched off the engine then switched it back on the message disappeared. Yippee I thought until yesterday a headlight bulb went so I had that changed and now the bonnet message is back on! The garage couldn't find the sensor either and WD40'd everything!

It's interesting to hear that this sets off the alarm as mine has been going off for the last two weeks for no reason (or so I thought). I read an earlier post on a different thread which has said if you remove the casing on the bonnet release there is a red connector however the poster advised after poking it with a screwdriver the message has completely gone, even when the bonnet is open!!!! I initially thought this would be a good plan however after sleeping on it I am having second thoughts. I don't want to give in and take it to Volvo however my mechanical skills are EXTREMELY limited.

[raybo2022]

Hi Guys, I have a similar problem on my V60 D4. Bonnet symbol appeared a while ago as i was driving, then disappeared. It was fine for a while after that, but is now staying on all the time! I have sprayed load s of silicone lubricant around both latches, but to no avail.
On the o/s/f latch there is a plunger behind the latch which can be pushed down so I assume that this is the guilty latch sensor. I couldn't see the wiring but will take the headlight out later and have a look.
The car has locked ok, but the indicators didnt flash when it locked. They do flash as usual when i unlock it again. I notice the flashing light on the dashboard which indicates the car is locked is flashing as normal when the car is locked. Does this signify that the alarm is actually on?
TIA

[raybo2022]

Originally Posted by raybo2022

Hi Guys, I have a similar problem on my V60 D4. Bonnet symbol appeared a while ago as i was driving, then disappeared. It was fine for a while after that, but is now staying on all the time! I have sprayed load s of silicone lubricant around both latches, but to no avail.
On the o/s/f latch there is a plunger behind the latch which can be pushed down so I assume that this is the guilty latch sensor. I couldn't see the wiring but will take the headlight out later and have a look.
The car has locked ok, but the indicators didnt flash when it locked. They do flash as usual when i unlock it again. I notice the flashing light on the dashboard which indicates the car is locked is flashing as normal when the car is locked. Does this signify that the alarm is actually on?
TIA

UPDATE:
After reading some of the posts on here about a workaround by shorting out the wires on the sensor, i decided to give it a go. When I removed the headlight however, i could not find the necessary terminal block as pictured on some posts. What I did see was what I took to be a single wire through a hole in the shroud around the bonnet sensor.
With nothing to lose i carefully pulled it through to see if it was to do with the sensor.
Weirdly, it was not a wire but a piece of straw, obviously picked up from the loose straw ledt behind when wagons full of straw bales travel the motorway and shed loose strand.
I took it out, refitted the headlight, closed the bonnet and gues what?
NO MORE BONNET OPEN WARNING LIGHT!!!
This was about 3 weeks ago, and touch wood, so far it has not reappeared!
I reckon this must have somehow interfered with the contacts closing and the warning light coming on!