Home > Maintenance & Mods (L405) > Tailgate anti-trap sensors - testing |
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Cam-Tech-Craig Member Since: 03 Aug 2011 Location: Gloucestershire Posts: 16286 |
I believe they are torque variant motors. So, something gets trapped and the relevant amount of torque reverses the motors? Buy I could be completely wrong in my assumption…
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26th Jun 2023 2:22pm |
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Alistair Member Since: 11 Feb 2011 Location: Peterborough / Bordeaux / Andorra Posts: 7932 |
I had a similar but different problem - but the process will be the same. That is, buy an ODB code reader & see what fault codes are being generated. That will point you in the right direction. You can also read the real time values from the sensors if required.
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26th Jun 2023 3:06pm |
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M11buc Member Since: 06 May 2019 Location: Newcastle upon Tyne Posts: 42 |
Not sure how if all model years have them, but pretty sure the later model years have the anti trap sensors in the sides of the upper tailgate.
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27th Jun 2023 3:01am |
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Alistair Member Since: 11 Feb 2011 Location: Peterborough / Bordeaux / Andorra Posts: 7932 |
Agree - the anti-trap on the lower tailgate should cause that to re-open - or in my case, not even try to close. There may also be a sensor that checks the lower tailgate is fully closed and it sounds like that's the case to me. Then there's anti-trap on the upper tailgate.
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27th Jun 2023 6:59am |
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JCW Member Since: 13 Apr 2013 Location: Cotswolds Posts: 865 |
This was the case on my L405, I swapped all four sensors for new ones but still had an issue, I then decided to re-align the tailgate (and replaced the bolts that secure the upper hinges, there a TSB relating to this) and hey presto, it worked faultlessly. Jonathan 2007 Defender 90 XS Hardtop |
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27th Jun 2023 7:32am |
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Richiesrangey Member Since: 17 Sep 2022 Location: Edinburgh Posts: 11 |
Thanks all for your advice and insights - all really helpful. I tested each anti trap sensor individually by starting the tailgates closing and squeezing the strips. All work fine one needed glueing back in place, nothing fowling them or any damage.
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27th Jun 2023 11:08am |
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Kot Member Since: 10 Mar 2021 Location: broadland Posts: 1205 |
Well a few days ago using the spare wheel removal system I stupidly forgot to remove the clamp from the upper gutter and closed the tailgate. Fortunately it stopped on contact and re-opened itself, so it must also have some sort of torque motor sensing! 2018 SE SDV8 4.4 Byron Blue |
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27th Jun 2023 1:30pm |
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Kot Member Since: 10 Mar 2021 Location: broadland Posts: 1205 |
Also in the WS manual section 501-03 there is a 60 page troubleshoot guide for upper and lower tailgate 2018 SE SDV8 4.4 Byron Blue |
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29th Jun 2023 2:17pm |
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Haylands Member Since: 04 Mar 2014 Location: East Yorkshire Posts: 8222 |
Check out this, it maybe the problem, maybe not but it's a free check...!!
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30th Jun 2023 4:00pm |
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Richiesrangey Member Since: 17 Sep 2022 Location: Edinburgh Posts: 11 |
To close this one off:
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2nd Jul 2023 2:45pm |
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Alistair Member Since: 11 Feb 2011 Location: Peterborough / Bordeaux / Andorra Posts: 7932 |
Good news & hopefully a permanent fix |
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2nd Jul 2023 4:10pm |
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Kot Member Since: 10 Mar 2021 Location: broadland Posts: 1205 |
Great research and sharing of your problem- 2018 SE SDV8 4.4 Byron Blue |
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3rd Jul 2023 7:47am |
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