65685 - Heated seat backrest; front right not working

[figo_rulz11]

 drivers side back rest wasn't heating up this morning but yet bottom part of seat was heated up nicely?! I tested passenger side and the whole seat works fine only the drivers side back rest that isn't working? 

 

Any ideas?

Mine is a 2017 A4

From Carista App fault code- 

Central electronics:
65685 - Heated seat backrest; front right - open or short to plus

[Magnet]

Hello Ravi,

Probably a break in the supply wire to the rear seat section. You would need to remove the seat, dismantle it and discover the issue. Do not ( in caps) disconnect any plugs into the seat without having disconnected the battery for 30 mins before doing so - or you’ll end up setting the air bags off. 
Kind regards,

Gareth. 

[Stevey Y]

1 hour ago, figo_rulz11 said:

 drivers side back rest wasn't heating up this morning but yet bottom part of seat was heated up nicely?! I tested passenger side and the whole seat works fine only the drivers side back rest that isn't working? 

 

Any ideas?

Mine is a 2017 A4

From Carista App fault code- 

Central electronics:
65685 - Heated seat backrest; front right - open or short to plus

HI its probably a dirty/loose connection under the seat, couldn't tell you which one without a diagram, but the easy way around it is leave the car overnight and then unlock it from a distance, get an assistant to open the door and keep the key out of range, this will give the airbag module time to drain down and it won't cause problems as they only work on 4ohms, then take off one plug at at a time and clean with electrical cleaner the connectors often become loose due to the seat moving back and forth when hoovering the car.

Steve.

[jdragon]

My A5 has the same fault.

I may get round to resolving this.

Let us know how you get on.

[figo_rulz11]

17 hours ago, Stevey Y said:

HI its probably a dirty/loose connection under the seat, couldn't tell you which one without a diagram, but the easy way around it is leave the car overnight and then unlock it from a distance, get an assistant to open the door and keep the key out of range, this will give the airbag module time to drain down and it won't cause problems as they only work on 4ohms, then take off one plug at at a time and clean with electrical cleaner the connectors often become loose due to the seat moving back and forth when hoovering the car.

Steve.

 I took my car down to my mechanic this morning as he was replacing my heated wing mirrors as they had failed and I asked him if he could take a look at my driver side heated seat backrest not heating up and he basically cleaned the connections under the drivers seat and plugged them back in, reset the fault code and now I finally have heated backrest again whoop!!!! So happy haha. 

 

 

Edited February 7, 2023 by figo_rulz11

[Steve Q]

4 hours ago, figo_rulz11 said:

 I took my car down to my mechanic this morning as he was replacing my heated wing mirrors as they had failed and I asked him if he could take a look at my driver side heated seat backrest not heating up and he basically cleaned the connections under the drivers seat and plugged them back in, reset the fault code and now I finally have heated backrest again whoop!!!! So happy haha. 

 

 

Glad you got sorted 🙂

[figo_rulz11]

21 hours ago, jdragon said:

My A5 has the same fault.

I may get round to resolving this.

Let us know how you get on.

See my last comment bud, try that out and see how you get on, let me know! 

[jdragon]

On 2/8/2023 at 7:11 AM, figo_rulz11 said:

See my last comment bud, try that out and see how you get on, let me know! 

Thank you.

The car battery voltage has been reducing for several months. It's now on 11.9V so I'll tackle the heated seat when I replace the battery in a few weeks, and report back. 

[Magnet]

Always worth buying once and wisely with batteries Jon.  I only buy brands and grades that have a minimum of 4 year warranties. I tend to buy mine on line from specialist suppliers at competitive prices. 
Don’t forget to get it coded to the car.

Kind regards,

Gareth. 

[jdragon]

Thanks Gareth. I'll be purchasing this when I know I'll be home for the day.

https://www.tayna.co.uk/car-batteries/varta/f21/

And yes, you're right about the coding. The guys over at Ross-tech have made it very easy

http://wiki.ross-tech.com/wiki/index.php/Battery_Replacement

[Magnet]

Thanks John,

Sounds good, but slightly cheaper from Battery Magastore on eBay. Tayna list on there as well. Incase it helps, I always buy via. eBay (postage is included in the price there) since you have the backing of eBay if anything goes wrong. You are on your own if buying direct. 
Perhaps a word of caution:- one seller is listing the same/similar battery at around £113, but their reviews appear poor.

Kind regards,

Gareth. 
p.s. You might look at the Bosch equivalent - reputed to be the same battery, but  simply rebranded. 

[jdragon]

Thanks for the heads up on Battery Mega Store

https://www.ebay.co.uk/itm/272392369515?mkcid=16&mkevt=1&mkrid=711-127632-2357-0&ssspo=UCf_2T-FRvm&sssrc=2349624&ssuid=BbKs5X6FTgi&var=&widget_ver=artemis&media=WHATS_APP

I bought the equivalent Varta for my B8 however, something I did notice was fluid leaked out of the breather plug and stripped a little paint in the tray.

There was a tube to insert on one side which I assumed was for this purpose. Maybe I shouldn't have removed both transport plugs? 

I'm avoiding Bosch since the filter issue and no response from their support team 😀 

[Magnet]

Thanks Jon,

Would you mind refreshing an aged memory on the Bosch filter issue? 
Interestingly, I’ve just moved away from Mann ( and Bosch)  oil filters for the annual service on the humble A3, due to helpful comments from Steve Y some time ago. 
I bought the Hengst equivalent from GSF at a fraction of Hengst, Mann and Bosch prices from other sellers. Just ordered on line and picked it up at their local- to - me branch. Great service. 
Just double check that I’m right in my belief that if you buy Varta or it’s equivalent Bosch, you are actually buying the same battery - simply branded Varta or Bosch as appropriate. 
Kind regards,

Gareth. 

[jdragon]

I've not heard of Hengst before but happy to learn.

Understood re the branding.

I've just purchased two Varta from Battery Megastore on eBay as there was a 10% off coupon too (and one for the wife's car as hers measured 11.6V).

Thanks again for the direction on that.

[Magnet]

Pleasure Jon. Glad that Battery Megastore worked for you. I did have an issue with a non Varta/Bosch battery for a ride-on mower from them, but they were progressive in sorting it out. 
I must say I use eBay for most parts for family member’s cars. I attempt to buy quality parts at competitive prices from reliable sellers - not just the cheapest for the same product. 

Incase it helps, I have favoured a variety of Febi ( Bilstein) aftermarket parts to seemingly good avail. Car Parts in Motion (Exeter) have provided a good mail order service for Febi parts at generally competitive prices. 
Again, it’s always worth checking GSF for their prices. 

Hengst filters? Believe they are part of the Mann empire ( German origins) but possibly still unaffected by this economics is king policy. I’ve just bought one for the A3 from GSF and first impressions give scope for being impressed - sturdy and quite heavyweight. The one for the A3 was just £4.30 if you believe, and I did buy a Mann for another car sometime last year from them, and that was less than £5. They are not competitive for some parts, but it’s always a case of shopping around.

Kind regards,

Gareth. 
p.s. No connection with any of the above mentioned suppliers, apart from having bought from them. 

[jdragon]

Update: I replaced the battery last week, and while I was doing it I unplugged and cleaned all the seat connectors but the backrest does not heat up.

Not sure if I can be bothered to claim on the warranty / get it fixed because it's not something I need from the car.

[figo_rulz11]

1 hour ago, jdragon said:

Update: I replaced the battery last week, and while I was doing it I unplugged and cleaned all the seat connectors but the backrest does not heat up.

Not sure if I can be bothered to claim on the warranty / get it fixed because it's not something I need from the car.

You may need to clear fault codes after cleaning the seat connectors and then try again once vehicle is off and then back on?