Rain sensor - Automatic wipers

[nicktooley]

Can anyone help?

When set on intermittent, my wipers seem to go to full speed when it's hardly raining or not wipe at all. I seem to be constantly adjusting the wiper frequency to keep the windscreen clear, I hate having the wipers on and much prefer intermittent but the sensors kick in and go stupid.

I am wondering if the recent replacement windscreen might have upset the sensor - has anyone else come across this?

[haysy]

Mine does the same thing and I hav'nt had the windscreen replaced :0( As you say they seem to work ok for a short while and then they go flat out and adjusting the frequency/sensitivity seems to have no effect.
I assumed my sensor was faulty.

[MFGF]

Can anyone help?

When set on intermittent, my wipers seem to go to full speed when it's hardly raining or not wipe at all. I seem to be constantly adjusting the wiper frequency to keep the windscreen clear, I hate having the wipers on and much prefer intermittent but the sensors kick in and go stupid.

I am wondering if the recent replacement windscreen might have upset the sensor - has anyone else come across this?

That definitely doesn't sound right! Mine hasn't done this on either of the 4fs I have had. I would imagine the windscreen replacement might be the cause, but you would need to get the car checked I think.

Cheers!

MF


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[coolraj003]

i have had this a few times too but it sorted itself out really. Used to get very fast even with very little rain. It is annoying but i havent seen it happen for more than a month now.

Raj

[Blackavant]

See here :-

www.vwaudiforum.co.uk/forum/showthread.php?127141-DRL-Light-Sensor

I made an adjustement on my DRL's with VCDS which also made a difference to the rain sensivity.

[nicktooley]

Thanks everyone, now got an oil leak in front o/s wheel arch somewhere so I might as well get them both looked at - yippee!

[Bloobat]

This happens on mine as well - when wipers on automatic starts off well but after a few minutes its flat out even if its just spitting with rain. Given up usung the auto mode......

[nicktooley]

Thanks - but don't you find even in manual mode they still go flat out when they think its raining hard (even when it isn't as you say)?

[Blackavant]

Now i've changed the windscreen type witch VCDS mine don't go flat out until level 4 of the wiper stalk. Regardless of rain level.

[EssexGonzo]

Had this sort of thing with mine for ages, then got the sensor replaced under warranty. Same sensor for lights and wipers?

[inspectorman63]

This is a me too post, but it also has the answer. Having driven my 2006 2.0 TFsi for six months, I too was unimpressed that the intermittent wipers were far too keen to go to maximum wiping and were too sensitive. I ended up never using positions 3 and 4, and rarely position 2. The wiki on the RossTech site is no help; it redirects to an A8 setting which cannot be input into an A6. So I asked them.

After one suggestion which didn't work, they suggested setting the RLS (RegenLichtSensor) coding to 00077101. The setting I had was 00141886. The new setting has transformed the sensitivity of the intermittent wiping from very annoying to usable. Settings one to four now have a usable range of sensitivity, and full speed mad wiping is rarely initiated by the sensor. A great result from RossTech and another reason for buying the genuine gear rather than the moody knock-offs.

[dan2485]

Will have to try this once the wife gets back with the car.

[rivets]

Was advised at my last screen change there is a disc shaped filter between the sensor and the windscreen, if this is missing or the wrong one bedlam ensues in the lightest of drizzle!


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[dan2485]

Changed the coding on the RLS (RegenLichtSensor) to 00077101 during the week as inspectorman63 posted. Wiper's now working very well no erratic wiping in drizzle conditions.
Many Thanks,

[cm.popa]

This is a me too post, but it also has the answer. Having driven my 2006 2.0 TFsi for six months, I too was unimpressed that the intermittent wipers were far too keen to go to maximum wiping and were too sensitive. I ended up never using positions 3 and 4, and rarely position 2. The wiki on the RossTech site is no help; it redirects to an A8 setting which cannot be input into an A6. So I asked them.

After one suggestion which didn't work, they suggested setting the RLS (RegenLichtSensor) coding to 00077101. The setting I had was 00141886. The new setting has transformed the sensitivity of the intermittent wiping from very annoying to usable. Settings one to four now have a usable range of sensitivity, and full speed mad wiping is rarely initiated by the sensor. A great result from RossTech and another reason for buying the genuine gear rather than the moody knock-offs.

Hi, I've tried to change the coding on my 55 plate A6 but the code was not accepted. Could it be because I may have an older version of the cotrol module? The original setting is the same though 00141886...

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[Guest 2]

Are you using the most up-to-date version of VCDS?

[cm.popa]

I think I am, I mean I've update it every time I've been promted to do so, I'll check any way. So you're saying that If I'm not using the latest version this
could cause the module not to accept the new coding?

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[apole]

Hi,

Where is the rls module in vcds, just trying to have a go at this myself on a 2005 model year. Can't see for looking !

Thanks guys

Andy

[Guest 2]

Press 09 Cent Elec, Coding, then you'll get the coding screen and a drop down menu. Select rainlightsensor (might be in german) then long coding helper and you can go from there.

[apole]

Thanks Chris,

Will give it a go and see if it works.

[MarkTM]

Yep worked for me, with a screen that's been treated with aquapel I rarely need wipers except in all but the heaviest downpours, and the wipers going at full pelt were more of a distraction than a convenience :D

[Splash]

This is a me too post, but it also has the answer. Having driven my 2006 2.0 TFsi for six months, I too was unimpressed that the intermittent wipers were far too keen to go to maximum wiping and were too sensitive. I ended up never using positions 3 and 4, and rarely position 2. The wiki on the RossTech site is no help; it redirects to an A8 setting which cannot be input into an A6. So I asked them.

After one suggestion which didn't work, they suggested setting the RLS (RegenLichtSensor) coding to 00077101. The setting I had was 00141886. The new setting has transformed the sensitivity of the intermittent wiping from very annoying to usable. Settings one to four now have a usable range of sensitivity, and full speed mad wiping is rarely initiated by the sensor. A great result from RossTech and another reason for buying the genuine gear rather than the moody knock-offs.Has anyone noticed a simple on/off option for the auto wipers in VCDS? I'll have a look next time I connect to the car. Thankfully on the C7 there's an option in the MMI to disable the Nanny.

[gupsterg]

This is a me too post, but it also has the answer. Having driven my 2006 2.0 TFsi for six months, I too was unimpressed that the intermittent wipers were far too keen to go to maximum wiping and were too sensitive. I ended up never using positions 3 and 4, and rarely position 2. The wiki on the RossTech site is no help; it redirects to an A8 setting which cannot be input into an A6. So I asked them.

After one suggestion which didn't work, they suggested setting the RLS (RegenLichtSensor) coding to 00077101. The setting I had was 00141886. The new setting has transformed the sensitivity of the intermittent wiping from very annoying to usable. Settings one to four now have a usable range of sensitivity, and full speed mad wiping is rarely initiated by the sensor. A great result from RossTech and another reason for buying the genuine gear rather than the moody knock-offs.

Here is rundown of what RT wiki is explaining on coding, first your original coding:-


Step 1

Coding in module shown as decimal code this needs to be converted to hex.

00141886 DEC TO HEX 22A3E

Step 2

Then add 0 = 022A3E

Step 3

Now separate bytes right to left and convert hex to dec to get % of correction/options.

BYTE 00=3E (HEX) = 62 (DEC) = Rain Sensor Correction value is 62%
BYTE 01=2A (HEX) = 42 (DEC) = Light Sensor Correction value is 42%
BYTE 02=02 (HEX) = 02 = 02 (Rain Light) set

Byte 02 coding is the sum of the individual options.

What are the options for byte 02? Besides highway/rain light you can make lights activate earlier plus make rain sensor inactive.

http://www.vwaudiforum.co.uk/forum/attachment.php?attachmentid=25906&stc=1http://www.vwaudiforum.co.uk/forum/attachment.php?attachmentid=25905&stc=1

Eagle eyed viewers may have noted that in the long coding helper images things are backwards to the explanation above/RT Wiki and that's why RT state in wiki:-


Bytes are counted from right to left, starting with 0. This is backwards from what you may be used to from editing Long Codings.

So what have RT done to your car with new coding?


00077101 DEC TO HEX 12D2D

Then add 0 = 012D2D

BYTE 00=2D (HEX) = 45 Rain Sensor Correction value
BYTE 01=2D (HEX) = 45 Light Sensor Correction value
BYTE 02=01 (HEX) = 01 = 01 (Highway Light)

Byte 02 coding is the sum of the individual options.

So to me it look like as you went from 62% to 45% rain sensor correction lowering the percentage desensitises it? you may also note that your rain light function has been deactivated but highway light activated? I think rain light function must be that when rain is detected and car set to auto lights light come on? perhaps will test :)

So what if you wanna use your own values of sensor correction?

I haven't tested this but will at some point! :) , I'm assuming we do the reverse. So lets say I wish to have:-


Rain correction 30% = 1E (HEX)
Light at 20% = 14 (HEX)
Plus want highway & rain light active = 03

There for 03141E , then drop the 0 = 3141E , convert to decimal = 201758 .
But as coding must be 8 digits we fill with zeros at beginning (I'm not gonna explain how I reach is conclusion), so 201758 becomes 00201758.

Now as a final check take 00201758 convert to hex and we get 3141E, add the 0 = 03141E which is what we started with :).


Has anyone noticed a simple on/off option for the auto wipers in VCDS?

Hi, try the tick box rain sensor inactive in long coding helper, I know I will be just to have a meddle! ;) .

Next just for thread, I've never had issues with my wipers being too sensitive or not enough, I've also had my windscreen swapped from a genuine to non genuine when replaced by autoglass but I did add the high way light feature.

My coding was originally like inspectorman63 (ie 00141886) after my meddling = 00207422 , breakdown is :-


00207422 DEC TO HEX 32A3E

Then add 0 = 032A3E

BYTE 00=3E (HEX) = 62
BYTE 01=2A (HEX) = 42
BYTE 02=03 (HEX) = 01+02 = Options 01 (Highway Light) and 02 (Rain Light) set

Byte 02 coding is the sum of the individual options.

Now I did this when Apole/I where in this thread Link:- Auto Wipers not so sensitive (http://www.vwaudiforum.co.uk/forum/showthread.php?134623-Auto-Wipers-not-so-sensitive)

But I think only truly now I've given it the gupsterg touch! :cool: