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Old 4th August 2022, 15:23   #1
finbarr saunders
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Default reversing sensors.

Hi all, just lately when i put the car in reverse the sounder is going off constantly, Thinking it might be the control box I set out to change it as I have the dreaded water leak in the back so thought it might have got soaked, after pulling the trim out found that the control box is a different colour (mines a tourer & I got it off a saloon) although the plugs are the same, I tried it anyway & the sounder just clicked (I hope this is not normal!), so I changed it back & off it went again, I then removed one of the sensors & unplugged it & it shut up, So my questions are A/ are the control boxes interchangeable & B/ if you disconnect one sensor do the others still work as normal?, Sorry for the long winded post!.
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Old 4th August 2022, 16:25   #2
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I would check all the sensors first, put car in reverse engine off but ignition on then put your ear up to and close to each sensor if it's got a faint clicking it's ok if no sound then you have a duff sensor, this will give you the constant beep. Mine had two duff sensors replaced them and all is fine now
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Old 4th August 2022, 20:28   #3
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As above.

If one sensor fails, the whole thing won't work. Worth having a spare or two, then you can swap about.

DMGRS have some on clearance.
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Old 5th August 2022, 00:07   #4
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This is my problem too. Continuous tone on reversing, seems to be working correctly about one in ten times. Tried DMGRS but the website states 'sold out'.

Last edited by edwardmk; 5th August 2022 at 00:11.. Reason: cat walked over the keyboard
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Old 5th August 2022, 01:12   #5
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Quote:
Quote:
Originally Posted by finbarr saunders View Post
Hi all, just lately when i put the car in reverse the sounder is going off constantly, Thinking it might be the control box I set out to change it as I have the dreaded water leak in the back so thought it might have got soaked, after pulling the trim out found that the control box is a different colour (mines a tourer & I got it off a saloon) although the plugs are the same, I tried it anyway & the sounder just clicked (I hope this is not normal!), so I changed it back & off it went again, I then removed one of the sensors & unplugged it & it shut up, So my questions are A/ are the control boxes interchangeable & B/ if you disconnect one sensor do the others still work as normal?, Sorry for the long winded post!.
Saloon early ones are black, and i think they are also year dependant.
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Tourer face lift one are white.
3
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Old 5th August 2022, 11:22   #6
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Saloon early ones are black, and i think they are also year dependant.
1

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Tourer face lift one are white.
3
Thanks for that, Mine is a 2001 tourer & has a black box fitted but I got hold of a white one off a scrappy, they both use the same plugs/connections so i'm wondering where the difference in colour comes into play as it seems they both use the same sensors?, & I cant see why there would be any difference between a tourer or saloon setup, or of course it maybe that my 2nd hand white unit is duff!.
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Old 5th August 2022, 11:27   #7
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Originally Posted by edwardmk View Post
This is my problem too. Continuous tone on reversing, seems to be working correctly about one in ten times. Tried DMGRS but the website states 'sold out'.

There are a few sellers on an auction site & they are around £10 each (reduced from £23 apparently).
Oh & thats how mine started off & then got gradually worse, so prepare yourself for ten out of ten times.
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Old 5th August 2022, 11:37   #8
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Thanks for that, Mine is a 2001 tourer & has a black box fitted but I got hold of a white one off a scrappy, they both use the same plugs/connections so i'm wondering where the difference in colour comes into play as it seems they both use the same sensors?, & I cant see why there would be any difference between a tourer or saloon setup, or of course it maybe that my 2nd hand white unit is duff!.
I think but mot 100% sure that the earlier ones had there own sounder, whereas the later ones it was incorporated into the IPK ?

Someone will know but you can not inter change them, i think i have a couple of black ones in the shed somewhere.

Will take a look a later a read what it says on my white one as opposed to the black one.

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Old 5th August 2022, 16:03   #9
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Well I checked the sensors & all clicking so I guess they are o,k, Looks like it's the control box after all, typical when I have put all the interior back in!.
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Old 5th August 2022, 19:22   #10
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That isn't correct. If they are clicking it does mean they are detecting your head, but it doesn't prove they aren't still detecting something when you move away.


I found some corrosion on one of the sensor surfaces so removed all of them, rubbed them down and resprayed them. They have been fine since.
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