Speed sensor - door opens when driving

Speed sensor - door opens when driving

Author
Discussion

ordwood

Original Poster:

42 posts

92 months

Sunday 30th April 2017
quotequote all
Had a near disaster earlier today when the passenger accidentally pressed the door opening button and the door opened at 50mpg aarrggghhh !!! Now that shouldn't have happened.

I've been through the wiring diagram and can see the slate grey wire which comes from the speed sensor which goes to the speedo has a T in it which goes to the door control unit (B9). So first thing was to check the continuity of the wire but sadly that wasn't the issue....wire is good.

So it looks as though it's an internal issue with the control box.

Not wanting to be off the road as we approach the summer while I send the box off to be sorted, any other good suggestions other than don't carry passengers to keep everyone safe ?

Cheers in advance

ordwood

Original Poster:

42 posts

92 months

Sunday 30th April 2017
quotequote all
Just to add to the above, does anyone else's interior door buttons still work when driving ?


RUSSELLM

6,000 posts

246 months

Monday 1st May 2017
quotequote all
I haven't tested my doors at speed, for a bit smile

Looking at that diagram, providing the speedo's working, I agree that it shouldn't be anything other than the door module ignoring the input.

As a temporary fix, I suppose you could disable the passenger internal button, via a switch near to the door module. A sort of aftermarket 'child lock' smile

Penelope Stopit

11,209 posts

108 months

Monday 1st May 2017
quotequote all
Don't disable anything, if your car goes up in flames people need to be able to get out of it

RUSSELLM

6,000 posts

246 months

Monday 1st May 2017
quotequote all
If it goes up in flames, I'd say relying on TVR's buttons, wiring and modules, should be your last concern smile
I'd more inclined to check the emergency pull cables are working.

Mr Cerbera

5,031 posts

229 months

Monday 1st May 2017
quotequote all
ordwood said:
Had a near disaster earlier today when the passenger accidentally pressed the door opening button and the door opened at 50mpg aarrggghhh !!!....
You lucky, lucky bd !

Mine only open at a maximum of 25mpg

They do, however still open up to approx. 5 mph

rofl

ukkid35

6,137 posts

172 months

Monday 1st May 2017
quotequote all
RUSSELLM said:
I'd more inclined to check the emergency pull cables are working.
I am embarrassed to admit that it took me a while to fix the emergency door release on the drivers side. However the emergency passenger door release has always worked, so at least I was only toying with my own safety.

The failure was due to water ingress and corrosion causing the cable to seize, not ideal at all.

ClassicChimaera

12,424 posts

148 months

Monday 1st May 2017
quotequote all
Mr Cerbera said:
You lucky, lucky bd !

Mine only open at a maximum of 25mpg

They do, however still open up to approx. 5 mph

rofl
biggrin

ordwood

Original Poster:

42 posts

92 months

Monday 1st May 2017
quotequote all
Penelope Stopit said:
Don't disable anything, if your car goes up in flames people need to be able to get out of it
Good point !

ordwood

Original Poster:

42 posts

92 months

Monday 1st May 2017
quotequote all
Mr Cerbera said:
You lucky, lucky bd !

Mine only open at a maximum of 25mpg

They do, however still open up to approx. 5 mph

rofl
Auto correct ! I hate it.
25mpg .......I wish

fatjon

2,142 posts

212 months

Tuesday 2nd May 2017
quotequote all
RUSSELLM said:
If it goes up in flames, I'd say relying on TVR's buttons, wiring and modules, should be your last concern smile
I'd more inclined to check the emergency pull cables are working.
Can't reach the pull cables, my beer gut is too big!

Mr Cerbera

5,031 posts

229 months

Wednesday 3rd May 2017
quotequote all
ordwood said:
Mr Cerbera said:
You lucky, lucky bd !

Mine only open at a maximum of 25mpg

They do, however still open up to approx. 5 mph

rofl
Auto correct ! I hate it.
25mpg .......I wish
Go and see Joo, His rechip'll sort you out

Jooles81

127 posts

148 months

Thursday 5th October 2017
quotequote all
Hello,

Digging out the topic....

How hard is it supposed to pull on the emergency releases? As easy as opening a door on a normal car or hard enough to be sure that your girlfriend will not be able to open it?

Thanks!

Julien

RUSSELLM

6,000 posts

246 months

Friday 6th October 2017
quotequote all
I’m not sure if it’s the way i’m reading it, but it sounds like you don’t want her to get out smile

A word of warning, the first time I pulled my driver’s side, it came off in my hand.
I had to escape via clambering over in to the passenger’s side.

I’d be inclined to give them a pull periodically, to make sure they work.

Jooles81

127 posts

148 months

Friday 6th October 2017
quotequote all
Hello!

I want her to be able to get out, the problem is that she couldn't open the door with the emergency release...

Finally, I've plunged behind the panel to the catch only to discover that the release cable was linked to the top lever, which is much harder to pull than the lever pulled by the solenoid. I've changed the pulling point and now everything is fine. Finally pulling is not harder than in any car, which is a lot better.

After having a look there, I definitely recommend to test the system periodically : cable is only fixed with 1 screw (may add one or two for peace of mind) and there was leaves around the solenoid on both sides, meaning that air (and moisture) can get there...

Thanks for your reply!

Julien