Can anyone tell me if the autowipers were to fail for any reason the system would revert automatically back to a conventional manual intermittent type?

 

Depends what the failure is...😉

 

At a guess, the auto position would be either very quick or very slow or not work at all.

 

Assuming it's just the rain light sensor at fault, the other positions would probably work as normal.

Thanks. I don't yet know what is causing the problem but my wipers just seem to work like standard intermittent ones, ie you put them on and they merrily sweep away at a constant speed and moving the sensitivity adjuster just increases the frequency of the sweep regardless of the amount of rain. They also seem to work as soon as you turn on the ignition and not when you move off. 

Have they ever worked properly on auto? If not, a previous owner may have coded them out.

 

An autoscan with VCDS or similar will show any fault codes which may give you some clues 👍

I had a similar issue with my previous rain sensor with error saying "incorrect sensor position". Replace the sensor (replacing the silicon pad didn't work) fixed the issue.

On the 2018 model you can enable / disable the automatic function in the car menu under 'Wipers'. Might be worth checking if you have this option and that it is enabled?

Gave the screen a good clean and tried them again this morning. They did work but not perfectly. On a couple of occasions they kept on wiping for quite a while after the rain had stopped and the screen was dry. Guess its just the way they are. 

Sometimes they seem to revert to the "Random" setting where they do what they like !

Mine generally work but then go through periods of going crazy in light rain or hardly on when it pours down 🤪

Quote

17 hours ago, summerof44 said:

Thanks. I don't yet know what is causing the problem but my wipers just seem to work like standard intermittent ones, ie you put them on and they merrily sweep away at a constant speed and moving the sensitivity adjuster just increases the frequency of the sweep regardless of the amount of rain. They also seem to work as soon as you turn on the ignition and not when you move off. 

 

In the past mine have started to behave as you describe when the battery was starting to fail, in the quite early stages well before I saw any starting issues or info system warnings. New battery was eventually required and the auto wipers started to work correctly straight away.

 

 

Edited 17 February, 20224 yr by Pilotguy

On 17/02/2022 at 22:39, Pilotguy said:

 

In the past mine have started to behave as you describe when the battery was starting to fail, in the quite early stages well before I saw any starting issues or info system warnings. New battery was eventually required and the auto wipers started to work correctly straight away.

 

 

It's not long had a new battery, does seem to be working better now, just not 100%