Dodgy parking sensor!

Willienelson · 28th November 2015, 07:56

Hi all

Rear parking sensors giving a constant beep as though it's seeing an object behind.
Q1 can I shut them off or turn them down while I diagnose?
Q2 what is the likely cause of sensor failure?

These are factory fitted on a 75 connie tourer.

Any help most gratefully received as the constant beeping is annoying the wife!

Willie

freck · 28th November 2015, 08:06

A constant tone shows a fault with the system.
Possibly a wiring fault, or water in the plugs.
The sensors can be checked apparently by putting car in reverse (without engine running of course) and listening to each sensor in turn. A feint noise should be coming from each sensor.
Haven't tried it myself though, this is just from reading up on here

I'm waiting for my sensors to arrive so I can retrofit

Willienelson · 28th November 2015, 08:54

Cheers Steve, if this wind and rain lets up at any point I'll be checking that out.

Oddly, first reverse this morning and all was working well, second reverse constant tone.

I guess if a sensor fails I'd get no tone, rather than a constant one?

Hmm, more homework I think!

freck · 28th November 2015, 09:03

No, I think if a sensor fails you'll still get a constant tone.
The only time you'd get no tone is if the Control Unit fails.

Willienelson · 28th November 2015, 09:27

Cheers Steve

Chuckles · 29th November 2015, 07:19

I was told that corrosion on the sensor(s) causes constant bleeping. I have one that has a little crust on it that I assume is causing the bleeping. Sometime all the time; other time not at all.
I am going to try scraping off the crust and see what happens

Peter Garton · 29th November 2015, 10:51

Quote:

Originally Posted by Chuckles

I was told that corrosion on the sensor(s) causes constant bleeping. I have one that has a little crust on it that I assume is causing the bleeping. Sometime all the time; other time not at all.
I am going to try scraping off the crust and see what happens

Experienced the same symptoms with permantent bleeping.
I discovered corrosion on two of the rear sensors and so I scraped the bit of surface paint off plus the whitish corrosion underneath which was not visible, of course. They now work perfectly again and all I had to do was touch in the small scraped surface areas.

andrewscruff · 29th November 2015, 11:01

hi i had the same problem it turned out that one of the sensors was duff replaced all working fine

alanjay · 29th November 2015, 15:38

Quote:

Originally Posted by Peter Garton

Experienced the same symptoms with permantent bleeping.
I discovered corrosion on two of the rear sensors and so I scraped the bit of surface paint off plus the whitish corrosion underneath which was not visible, of course. They now work perfectly again and all I had to do was touch in the small scraped surface areas.

Same here.

alanjay · 29th November 2015, 15:41

Quote:

Originally Posted by Chuckles

I was told that corrosion on the sensor(s) causes constant bleeping. I have one that has a little crust on it that I assume is causing the bleeping. Sometime all the time; other time not at all.
I am going to try scraping off the crust and see what happens

It should work, worked on mine, occasionally mine reverts to constant beep, so I get out, rub thumb over sensors and they're back to normal.

28th November 2015, 07:56	#1
Willienelson Loves to post Rover 75 Tourer Join Date: Oct 2007 Location: Wigan Posts: 270 Thanks: 13 Thanked 15 Times in 10 Posts	Dodgy parking sensor! Hi all Rear parking sensors giving a constant beep as though it's seeing an object behind. Q1 can I shut them off or turn them down while I diagnose? Q2 what is the likely cause of sensor failure? These are factory fitted on a 75 connie tourer. Any help most gratefully received as the constant beeping is annoying the wife! Willie __________________ [SIGPIC][/SIGPIC] Judging by the frying pan that's just flown by my head, it appears I've done something wrong.

28th November 2015, 08:06	#2
freck Posted a thing or two Rover 75 CDT Connie Tourer Join Date: Oct 2015 Location: Preston Posts: 1,051 Thanks: 142 Thanked 274 Times in 226 Posts	A constant tone shows a fault with the system. Possibly a wiring fault, or water in the plugs. The sensors can be checked apparently by putting car in reverse (without engine running of course) and listening to each sensor in turn. A feint noise should be coming from each sensor. Haven't tried it myself though, this is just from reading up on here I'm waiting for my sensors to arrive so I can retrofit __________________ Steve Teamwork makes the dream work! Mods planned - Cruise retrofit - Done, ZT front bumper - Done, 160 remap - Done...and probably one or two more This vehicle was the 15,751st 75 Tourer to run off the production line, out of 27,407 This vehicle was the 3,726th 75 Tourer CDT Connoisseur to be made out of 4,100 This vehicle was the 732nd 75 Tourer in Starlight Silver (code: MBB) to be made out of 4,100 Starlight Silver 75 Tourers

28th November 2015, 08:54	#3
Willienelson Loves to post Rover 75 Tourer Join Date: Oct 2007 Location: Wigan Posts: 270 Thanks: 13 Thanked 15 Times in 10 Posts	Cheers Steve, if this wind and rain lets up at any point I'll be checking that out. Oddly, first reverse this morning and all was working well, second reverse constant tone. I guess if a sensor fails I'd get no tone, rather than a constant one? Hmm, more homework I think! __________________ [SIGPIC][/SIGPIC] Judging by the frying pan that's just flown by my head, it appears I've done something wrong.

28th November 2015, 09:03	#4
freck Posted a thing or two Rover 75 CDT Connie Tourer Join Date: Oct 2015 Location: Preston Posts: 1,051 Thanks: 142 Thanked 274 Times in 226 Posts	No, I think if a sensor fails you'll still get a constant tone. The only time you'd get no tone is if the Control Unit fails. __________________ Steve Teamwork makes the dream work! Mods planned - Cruise retrofit - Done, ZT front bumper - Done, 160 remap - Done...and probably one or two more This vehicle was the 15,751st 75 Tourer to run off the production line, out of 27,407 This vehicle was the 3,726th 75 Tourer CDT Connoisseur to be made out of 4,100 This vehicle was the 732nd 75 Tourer in Starlight Silver (code: MBB) to be made out of 4,100 Starlight Silver 75 Tourers

28th November 2015, 09:27	#5
Willienelson Loves to post Rover 75 Tourer Join Date: Oct 2007 Location: Wigan Posts: 270 Thanks: 13 Thanked 15 Times in 10 Posts	Cheers Steve __________________ [SIGPIC][/SIGPIC] Judging by the frying pan that's just flown by my head, it appears I've done something wrong.

29th November 2015, 07:19	#6
Chuckles Gets stuck in NOW a Club Tourer was 1999 - 75 2.0Ltr Connoisseur SE petrol Saloon Join Date: Jan 2012 Location: Iwerne Minster, Dorset Posts: 552 Thanks: 63 Thanked 54 Times in 47 Posts	I was told that corrosion on the sensor(s) causes constant bleeping. I have one that has a little crust on it that I assume is causing the bleeping. Sometime all the time; other time not at all. I am going to try scraping off the crust and see what happens __________________ Chuck Nth. Dorset. UK Membership #1896 Don't take life so seriously.... it is not permanent!

29th November 2015, 11:01	#8
andrewscruff Avid contributor rover 75 Join Date: Dec 2013 Location: bishops stortford Posts: 194 Thanks: 71 Thanked 10 Times in 9 Posts	reversing sensor hi i had the same problem it turned out that one of the sensors was duff replaced all working fine