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Discussion Starter · #1 ·
Ok, when selecting the button or select reverse you get a loud continuous beep with the light in the button flashing.

I used diagnostic and it said the rear left centre had shorted. So I replaced it with a brand new one only to find no difference to the problem, vagcom says it’s still the same fault.
I swapped it with the rear outer left, still the same problem.

I did a continuity check from sensor to plug break and there is no short.

i did a output check on the sensor and I could not get any reading for distance ie cm on the graph, when I selected ms I got output reading on all front and back sensors apart from rear centre left which was zero.

I need some help please, the next task is to remove the seat and find the control module and do a pin to pin continuity check from there to the sensor but that’s another job for another day.

any ideas .
 

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Under passenger seat (in rhd car) module, almost undoubtedly- I had the same but for a front left sensor. Replaced the unit with a test unit (circa £20) which gave me rear sensors only to test and worked for a couple of months before buying the proper one at an opportune moment.

Depends on the age/spec of the car as to whether the test unit I used will work.. when you have a look at the module make sure you share the part number with us. I’m sort of expecting you to find a little moisture there too.

Whereabouts are you based?
 

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Discussion Starter · #3 ·
In in Dorset, yes I have come to the conclusion it’s the control module under the pass seat. Once I remove the seat I can pin to pin from the module to rear sensor but I’d be surprised if it’s the wiring.
do you know how much a new control module is ? Or can I buy a second hand one and the recode it via vagcom.
on a separate note would you disconnect the battery when removing the seat, and on reconnection are there any resets I need to do ?
 

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Ah, bit far from me then.

Yes, I’ll be astounded if it’s the look unless your car has had damage. I suspect moisture in the module - I tested mine by fitting a similar but incorrect module which tested my rears only - that gave me the confidence that it was the module.

I’ve seen the module for £400-150 new - you can guess where I took a punt! Not sure what they are now and it depends on what your part number is. I have a feeling it’ll be 8P0 919 283B - later cars had 8P0 919 475N I think, which is also rear camera capable… I have one of those sitting on my desk in the office but my car wasn’t coded for it and before playing with that option I saw the 283B module was available at not too silly money.

The battery disconnect may be required for you, I just pulled the fuse from memory or simply left the car off, but my car has buckets/ no seat airbags to worry about.
 

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Discussion Starter · #6 ·
Disconnect the connectors to the module

265947


i used a multimeter to pin to pin from the CM to sensor, there are no shorts or open circuits so the wiring is good.
I opened up the CM and found corrosion,

265948

So looks like I need a new one,.

265949



265950
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Discussion Starter · #7 ·
When I reconnected the battery I had to
reset the windows
reset the clock to the correct time
go for a drive because the traction control light and mag ride suspension light were both lit in amber, the car doesn’t have mag ride which was interesting.
After about 2 miles both lights went out.
 

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Where is the corrosion? The circuit board looks v clean on the photo. There are a lot of these modules on eBay from £15 but with part no. suffix A or D, I think they are all audio only units but not 100% sure if they are compatible?
 

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Yup, had the same…

Soo, holding no liability for you/ your car, I’ll tell you what I did.

I bought a 8P0 919 283D. These are common/ inexpensive as they were used on A3s and TTS. This connects straight up and gave me rear working sensors only. It’ll prove it’s the module - and in fact I ran mine like that for 9months - then splashed out for a proper one at the right price.

That’s what I did, up to you if you want to follow suit. FYI I also came across a cheap later module (can’t recall the number off the top of my head) but it had reverse camera capability built in, so I was thinking ‘upgrade’. Sadly this was not plug and play… it didn’t work at all. I’m sure it could be coded in and I might revisit at a later stage with the rear camera+loom as a full upgrade, but it wasn’t a case of fit it and the rest works, nothing worked, so I went back to the 283D then ultimately the 283B.

Hope the above is of some use.

B
 

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Discussion Starter · #11 ·
Yup, had the same…

Soo, holding no liability for you/ your car, I’ll tell you what I did.

I bought a 8P0 919 283D. These are common/ inexpensive as they were used on A3s and TTS. This connects straight up and gave me rear working sensors only. It’ll prove it’s the module - and in fact I ran mine like that for 9months - then splashed out for a proper one at the right price.

That’s what I did, up to you if you want to follow suit. FYI I also came across a cheap later module (can’t recall the number off the top of my head) but it had reverse camera capability built in, so I was thinking ‘upgrade’. Sadly this was not plug and play… it didn’t work at all. I’m sure it could be coded in and I might revisit at a later stage with the rear camera+loom as a full upgrade, but it wasn’t a case of fit it and the rest works, nothing worked, so I went back to the 283D then ultimately the 283B.

Hope the above is of some use.

B
ive bought this one from an Audi A3, I don’t have a camera on my car. If it doesn’t work I’ll buy the right one from Audi, but for £15, I thought it was worth a try.
266027
 

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Discussion Starter · #12 ·
Just an update on this, I ordered a new control module for the parking assist and fitted it, I tried it and it didn’t really make sense, beeping all over the place.
I compared the coding values in vagcom old with new and realised the numbers were different, I plugged the old numbers into the new coding and hey presto it all works
 

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Yup, had the same…

Soo, holding no liability for you/ your car, I’ll tell you what I did.

I bought a 8P0 919 283D. These are common/ inexpensive as they were used on A3s and TTS. This connects straight up and gave me rear working sensors only. It’ll prove it’s the module - and in fact I ran mine like that for 9months - then splashed out for a proper one at the right price.

That’s what I did, up to you if you want to follow suit. FYI I also came across a cheap later module (can’t recall the number off the top of my head) but it had reverse camera capability built in, so I was thinking ‘upgrade’. Sadly this was not plug and play… it didn’t work at all. I’m sure it could be coded in and I might revisit at a later stage with the rear camera+loom as a full upgrade, but it wasn’t a case of fit it and the rest works, nothing worked, so I went back to the 283D then ultimately the 283B.

Hope the above is of some use.

B
Hi, you don't happen to have that module by any chance as I have a 2010 V10 Spyder with rear camera but none of sensors working and no camera when reverse engaged just a long beep and flashing button!
 
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