Go Back   The 75 and ZT Owners Club Forums > The 75 and ZT Owners Club Forums > Technical Help Forum
Register FAQ Image Gallery Members List Calendar Mark Forums Read
Notices

Reply
 
Thread Tools Display Modes
Old 10th November 2019, 01:28   #1
thanos.m
Avid contributor
 
Rover 75 saloon

Join Date: May 2019
Location: West Sussex
Posts: 220
Thanks: 54
Thanked 41 Times in 26 Posts
Default Rain Sensor

Hi everyone,
one of the things I would like to get working again on my car (which seems to be possessed by the worst of car demons) is the rain-sensing wipers, therefore, I would like some help diagnosing as to which part is at fault. When I bought the car they weren't working but one day out of blue they started working and after a few days they stopped again. so from what I've been told so far, the 2 main corporates are either the sensor itself or wiper stalk. So the way they behave now is pretty much like standard intermittent but when you turn them on they do the "check" thing of one wipe and pause for a little and then they operate like standard intermittent Additionally if you turn them on before turning the ignition on there is no wipe but a long pause and then they revert to standard intermittent. also from what I know, the wipers should perform one wipe every time you alter the sensitivity on the stalk mine do that only when increasing the sensitivity (shortening the time cycle on intermittent) but they don't do that when you decrease it. I also read on BMW forums some people got their wipers working again by unplugging the rain sensor fuse and plugging it back in, I tried that and clicked the stalk 1 up for intermittent the wipers came straight on continues wiping I turned them off and back on again from the stalk and once again one wipe pause and standard intermittent was back on.
Any ideas? also, do rain-sensing wipers use a different stalk from the standard ones because visually at least I can't see any difference.
Regards,
Thanos

Last edited by thanos.m; 10th November 2019 at 01:30..
thanos.m is offline   Reply With Quote
Old 10th November 2019, 10:27   #2
chicochapman
Avid contributor
 
MG ZT-T

Join Date: Feb 2019
Location: Stockport
Posts: 130
Thanks: 56
Thanked 22 Times in 20 Posts
Default

In my owner's handbook(MG ZT T) it says that the rain sensor only works when the stalk is set to intermittent and then it only changes the delay according to the amount of rain it "sees"


Malc
chicochapman is offline   Reply With Quote
Old 10th November 2019, 11:10   #3
thanos.m
Avid contributor
 
Rover 75 saloon

Join Date: May 2019
Location: West Sussex
Posts: 220
Thanks: 54
Thanked 41 Times in 26 Posts
Default

yeah I do know that my rain sensor isn't working at all my wipers simply work like non rain-sensing ones
thanos.m is offline   Reply With Quote
Old 10th November 2019, 11:21   #4
stevestrat
This is my second home
 
ZT260 #243 (resting)

Join Date: May 2010
Location: Prestonpans
Posts: 22,424
Thanks: 650
Thanked 4,624 Times in 3,358 Posts
Default

Have they ever worked during your ownership? Rather than guessing I'd get the car checked on a T4 (Lates600 over in Rugby?), TOAF might help but someone with a knowledge of TOAF would have to advise on that.
__________________
Steve


T4 Location Map

Last edited by stevestrat; 10th November 2019 at 11:26..
stevestrat is offline   Reply With Quote
Old 10th November 2019, 15:02   #5
thanos.m
Avid contributor
 
Rover 75 saloon

Join Date: May 2019
Location: West Sussex
Posts: 220
Thanks: 54
Thanked 41 Times in 26 Posts
Default

Yes they have but only for a few days I reckoned it'll need a T4 session but I bought a new sensor anyway it was only £9
thanos.m is offline   Reply With Quote
Old 10th November 2019, 15:07   #6
rovertone
Gets stuck in
 
Rover 75 Conne SE Auto CDTi

Join Date: Nov 2012
Location: Redditch
Posts: 665
Thanks: 185
Thanked 135 Times in 109 Posts
Default

Mine used to 'do their own thing' so I disconnected the sensor and they have reverted back to manual intermittent operation.
__________________
2003 Mk 1 Connie SE CDTi Auto Monogram Mirage 2/Sandstone Leather
511th CDTi out of 4744 produced
9th in Mirage 2 out of 17 produced
Also 2004 Rover 25 SXi CVT, 1999 Megane Cabriolet and still missing my 800 Fastback
.
rovertone is offline   Reply With Quote
Old 10th November 2019, 16:20   #7
smudge.g
Gets stuck in
 
smudge.g's Avatar
 
75 Tourer CDTi Connie SE

Join Date: Jun 2017
Location: Keith, Banffshire
Posts: 686
Thanks: 431
Thanked 132 Times in 105 Posts
Default

Also bear in mind that the 'sensitivity' of the rain sensor is set by twisting the end of the right hand stalk.
__________________
My 75 Tourer CDTi was born Saturday, 21st June 2003 @ 09:50

My 75 was the 18,749th 75 Tourer to run off the production line, out of 27,407
It was the 195th 75 Tourer CDT Connoisseur SE (135) to be made out of 2,074
and the 1,789th 75 Tourer in Wedgewood Blue Metallic (code: JEL) to be made out of 1,871 Wedgewood Blue Metallic 75 Tourers
smudge.g is offline   Reply With Quote
Old 10th November 2019, 18:21   #8
curzons246
Regular poster
 
Rover 75 tourer

Join Date: Jun 2013
Location: Long Eaton
Posts: 30
Thanks: 52
Thanked 0 Times in 0 Posts
Default Variable Delay

Quote:
Originally Posted by smudge.g View Post
Also bear in mind that the 'sensitivity' of the rain sensor is set by twisting the end of the right hand stalk.
Hi, my CDTI Contemporary has rain sensors. According to its manual rotating the end of the stalk varies the delay between wipes if I understand it correctly. Cheers Bill
curzons246 is offline   Reply With Quote
Old 10th November 2019, 19:39   #9
JohnnyBG
Avid contributor
 
ZT-T

Join Date: Sep 2019
Location: Teesside
Posts: 234
Thanks: 176
Thanked 66 Times in 38 Posts
Default

My rain sensors were fine until I had the windscreen replaced. The guy asked about the rain sensor and I told him there was one. Leaving work that eveningall was good. It started to drizzle and on came the wipers.


It stopped - they stopped.


Next day - nothing. Just standard operation and no sensor based activity.


So I'm watching this thread with interest despite having more important matters, like getting the Tourer running again, to deal with (see my HPFP post).


JohnnyBG

Last edited by JohnnyBG; 10th November 2019 at 19:39.. Reason: spelling
JohnnyBG is offline   Reply With Quote
Old 10th November 2019, 19:56   #10
thanos.m
Avid contributor
 
Rover 75 saloon

Join Date: May 2019
Location: West Sussex
Posts: 220
Thanks: 54
Thanked 41 Times in 26 Posts
Default

Yeah mine work like standard intermittent now but I want them to work again like auto ones. I do know that you adjust them by the end of the stalk. Well with standard wipers the end of the stalk adjust the intermittent cycle meanwhile on rain sensing ones its supposed to adjust the sensitivity. Is there difference like is it different part the stalk fitted to cars with rain sensing wipers to the cars fitted with standard ones because they look identical?
thanos.m is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT. The time now is 09:36.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Copyright © 2006-2023, The Rover 75 & MG ZT Owners Club Ltd