Blind Spot system and Rear Traffic system unavailable

[Bap33]

Hi all,

Since a couple of days, both my blind spot system and rear traffic alert system are not available at all on my Skoda Superb Mk3 (MY2017).
I can't activate anymore from the malfunction steering wheel buttons.

I've made the following scan tonight:
The main fault code related to this seems is quoted below:

 

-------------------------------------------------------------------------------

Address 10: Park/Steer Assist (J446)       Labels:| 5Q0-919-294.clb

   Part No SW: 5QA 919 294 B    HW: 5QA 919 294

   Component: PDC 8 KanalH07 0044

   Serial number: 000308418617265

   Coding: 0471155951

   Shop #: WSC 33361 790 00140

   ASAM Dataset: EV_EPHVA18AU3700000 009035

   ROD: EV_EPHVA18AU3700000.rod

   VCID: 4BBB8725E2D633DCA7-801E

1 Fault Found:

13688835 - Databus

          U1123 00 [008] - Received Error Message

          [New feature! Extended UDS fault detail is only supported by current gen. interfaces]

          Intermittent - Confirmed - Tested Since Memory Clear

             Freeze Frame:

                    Fault Status: 00000001

                    Fault Priority: 6

                    Fault Frequency: 1

                    Reset counter: 96

                    Mileage: 54747 km

                    Date: 2021.04.10

                    Time: 23:08:04

-------------------------------------------------------------------------------

 

But I have no idea about what to look at, since I didn't make any modification recently... No code adaptation, no retrofit, nothing.

 

However, I've made some search on internet. I've found possible paths to be investigated, but I feel quite skeptical:
- Battery voltage too low: The car is only 3 years and 3 months. I've driven ~4x 30km on motorway at ~110 km/h in less than 4h today. Thus I assume the alternator should have charged the battery to a correct level during these drives.
- Some oxydation on the trailer plug, that may fool the system. I've read that these systems are disabled when a trailer is plugged. Thus some pin oxydation may fool the system and let it "think" a trailer is plugged. I've used the trailer hook only once may be 2 years ago. The plug cap should protect the pins from oxydation, shouldn't it?
- I've also read about SW update by a Skoda dealer may fix the problem (read on a dutch forum). Quite surprising...

 

I'll have a look to first two hypotheses with the day light anyway. I'll update this thread upon what I find...

Any idea how to fix that... Any suggestion much appreciated!

 

Thanks

Edited 10 April, 2021 by Bap33

[Tin82]

It can be the battery. Mine failed after 1,5 years. Part of a poor batch. Also check your rear parking sensors. My dad had the same faults with his kodiak. One of the sensors was pushed slightly in. Hard to spot. After reseating it and erasing faults it came back to life. 

[Bap33]

Thanks.

The oustide left sensor was slightly pushed in indeed. I reseated it before this scan, but it didn't solve the problem.

I've also checked the battery voltage: 12,35V. Not very high, but not very low either. 

Regarding the trailer plug, it's like brand new. All pins are shiny, no sign of corrosion at all. 

 

I fear I need to upgrade my VCDS, since It seems to struggle reading come controllers... The Rear Cross Trafic might be one of them.

 

[JR RS]

The rear cross traffic alert and blind spot monitoring is done by the BSM radar behind the rear bumper.

 

No relation to the PDC sensors or trailer connections.

 

Either there is a fault with one of the radars (one on each side), or the blind spot indicator on the wing mirrors.  

Edited 11 April, 2021 by JR RS

[Bap33]

Thanks. 

Unfortunately, it's hard to know at this time since my my Micro-CAN VCDS starts being outdated. I would need a Hex-V2 to access these controllers (upon ross-tech forum information). I'll check the harnesses to start. If this doesn't solve the problem, I may have to upgrade my VCDS...  

[Guest]

This reminded me I needed to order my hex-v2 $_$

 

$98 usd for shipping to NZ is almost extortionate, oh well

[JR RS]

[Bap33]

Thanks @JR RS Much appreciated!

I have 2 days off, I'll try to have a look at it. 

[Parked]

Hi Bap33,

 

Likewise my  side assist, blind spot monitoring and rear traffic alert not functioning. I read on here of others with this problem that was solved by a "software update". My car was in at the dealers today for some warranty work and I am told they have solved this issue by updating the software.

 

 

[Bap33]

@Parked Thank you for your feedback.

In parallel, I opened a thread on ross-tech forum. They helped me to notice that for an unexplained reason the "3C - Lane Assist" controller has lost its coding, though it doesn't pops up any fault code ! The thing, is I still can tick the Lane Assiste system from the multi-function steering wheel. Really strange. Additionally, my Micro-CAN doesn't see the "CF" controller, which is for Rear Cross Traffic Alert. 

This being said, I think you're right, the SW needs to be updated or at least recoded.

Fortunately, I had an older autoscan version where I've found the original coding. I now have to recode it as it was, or at least I have to try. I don't know if my Micro-CAN will handle this . If not, I'll either have to upgrade my current VCDS cable to a HEX-V2 version or to go to my local dealer to have a software update. But since warranty is over since December 2019. I fear it will cost me a lot for the actual requested time... 

To be continued...

[Bap33]

 

Hi all!

I've just been trying to recode the '3C Lane Assist' controller. And... Gooooood news ! It seems to work! At least I don't get anymore fault code on both '3C Lane Change ' and '10 Park/Steer Assist' controllers!
I even can tick/untick all boxes (Lane Assist / Blind Spot Detection / Rear Traffic Assist) from the steering wheel without any biiip (error like).

Thus, here is what I've done:

First, I recoded the 3C Controller with its original coding 02012103.
Then I made a FIRST scan. There I started to get cold sweat, since I still had the fault code on '10 Park/steer Assist' Controller and on top of that, though I had recoded the '3C Lane Change' controller, I had a new fault code saying it was NOT coded...

Gasp... Very disappointed. I even thought I had made a mess! 

I cleared all fault codes.

Then I've made a SECOND scan: Oooh?!? No fault code anymore on both '3C Lane change' and '10 Park/Steer Assist' controllers. Hmmm... It starts smelling good! 
At this time, I tried to tick boxes from the steering wheel and... I could tick/untik all of them without any biiip or error message on the cockpit. Great!!!

I than made a THIRD scan: Still no fault code, but... a "Park/Assist function temporarily unvailable" error message popped up on the cockpit... 
I already had this message sometimes and when I restarted the engine the error message disappeared... but not systematically...

Well. I think that's it for today, since I have to wait for tomorrow to have a check drive and see if everything has come back to normal.

Anyway at this time, I truly thank the VCDS support on their forum.
I keep fingers crossed.
I'll come back to you to give you the conclusion of this solution. 

 

 

[Bap33]

Coming back to this software update solution proposed by some dealers...

If anyone (@Parked ?) , who had the software updated, could share a VCDS scan, to see what is their new SW version, I would appreciate very much. 

 

On my Superb MY2017, I have following SW version:

 

Address 3C: Lane Change (J1086)       Labels:| 5Q0-907-686.clb
   Part No SW: 5Q0 907 686 C    HW: 5Q0 907 686 C
   Component: HRE_Master    H12 0080  
   Serial number: 0454107103
   Coding: 02012103
   Shop #: WSC 33361 790 00140
   ASAM Dataset: EV_HREntryHella 001028
   ROD: EV_HREntryHella_VW37.rod
   VCID: 3D5FD9FDAC628D6C29-8068

   Lane change assistance control module 2: 
   Subsystem 1 - Part No SW: 5Q0 907 685 C    HW: 5Q0 907 685 C
   Component: HRE_Slave  H12 0080 
   Serial number: 0453826901          
   Coding: 020121

 

Note: My Mk3 is fitted with Lane Assist / Blind Spot Detection / Rear Cross Traffic Assist.

Thanks for your help! 

[JR RS]

I have a March build MY17.

My Lane Change controller is revision B.

Urs is revision C I noticed.

My coding is different too.

 

Address 3C: Lane Change (J1086) Labels:| 5Q0-907-686.clb

   Part No SW: 5Q0 907 686 B HW: 5Q0 907 686 B

   Component: HRE_Master H12 0071

   Serial number: 0433918774

   Coding: 02011203

   Shop #: WSC 33361 790 00141

   ASAM Dataset: EV_HREntryHella 001028

   ROD: EV_HREntryHella_VW37.rod

   VCID: 3C21368886E6FE9B93B-8068

 

   Lane change assistance control module 2:

   Subsystem 1 - Part No SW: 5Q0 907 685 B HW: 5Q0 907 685 B

   Component: HRE_Slave H12 0071

   Serial number: 0433874882

   Coding: 020112

No fault code found.

 

 

 

Edited 18 April, 2021 by JR RS

[Bap33]

@JR RS Thanks for having checked. 

Did you ever have the same problem and if yes, did you have a SW update to solve the problem?

Thanks

[JR RS]

4 hours ago, Bap33 said:

@JR RS Thanks for having checked. 

Did you ever have the same problem and if yes, did you have a SW update to solve the problem?

Thanks

 

Never come across the issues u've encountered, and I've had the car since new.

[Bap33]

OK. thanks. Lucky you  !

[Bap33]

Conclusion of check drive today:

'Lane Assist' and 'Blind Spot Detection' are operating properly again   !

On the other hand, I didn't have the opportunity to test the Rear Trafic Assist... This morning upon engine start, I had this "Rear Trafic Assist temporarily unavailable" error message... 

This evening, when leaving work place, no error message upon engine start... 

 

By the end of this week, I'll make a test with a carton box to see if the RTA is operating, and I'll check under the rear bumper to see if there's anything wrong on the controller connectors. This is the only short term solutions I see, before I have to spend some € to upgrade my VCDS Mrico-CAN to HEX-V2. The RTA controller cannot be seen from my Micro-CAN, indeed.

I'll let you know the next results of my investigations.  

 

Edited 19 April, 2021 by Bap33

[JR RS]

1 hour ago, Bap33 said:

 

 upgrade my VCDS Mrico-CAN to HEX-V2. The RTA controller cannot be seen from my Micro-CAN, indeed.

I'll let you know the next results of my investigations.  

 

 

There is no separate controller for the Rear Traffic Alert.

As I mentioned before, this is done by the 3C Lane Change Assist module, which u can already see.

I don't see any added benefit u upgrading to HEX-V2 in this instance.

 

The master (controller) is below the right taillight.

there is a slave under the left taillight.

 

Edited 19 April, 2021 by JR RS

[Bap33]

Uh.. I sincerely don't know.

Upon VCDS forum, my Micro-CAN cable starts being outdated and doesn't see any 'CF' controller, which should be seen, since it is to deal with RTA... 

Therefore I'm assuming that a cable upgrade to HEX-V2 could help scanning this 'CF' controller.

 

Anyway, thanks for this picture @JR RS. Very clear and helpful!

[Micky 32]

The battery in my 4 year old Passat sometimes complains when temps are below 5 degrees, funnily enough over 5 degrees it works quite well and the start stop works flawlessly. However when it's freezing sometimes the starter sounds like it struggles and when that happens it puts the error message " start stop : error". It clears if i restart the car though.

 

When the start stop error appears ( when temps are low) i did a vcds scan. One of the errors is the "databus "one but i also get a " function restricted due to insufficient voltage". In my case it's a weakening battery.

[JR RS]

3 hours ago, Bap33 said:

Uh.. I sincerely don't know.

Upon VCDS forum, my Micro-CAN cable starts being outdated and doesn't see any 'CF' controller, which should be seen, since it is to deal with RTA... 

Therefore I'm assuming that a cable upgrade to HEX-V2 could help scanning this 'CF' controller.

 

Anyway, thanks for this picture @JR RS. Very clear and helpful!

 

i have a HEX-V2 VCDS cable.  
all my scans, and wat i showed above is the output of it.

there is no "CF" controller, at least i can't see it, and mine is running the latest firmware and VCDS software.

 

anyways......good luck with it 

[Bap33]

@JR RS Thanks again for this additional information. 

One of the ross-tech forum specialists told me there should be a CF controller for RTA. But he admitted he wasn't 100% sure of it. This explains my previous message.  

If you say you don't see any CF controller with your HEX-V2 cable, this make me think I should concentrate on RTA controller or harnesses connectors. A good step forward anyway! 

Thanks! 

 

[Bap33]

Hi all,

 

I thought I did, but I did not !

Here is the final conclusion, I wanted to share: The recoding is OK. 

 

Lane Assist / Blind Spot Detection / Rear Trafic Assist are fully operating now! I haven't had any error message since that time.

I also made a test with a carton box. The RTA works fine! Moby **** (yes, the small nickname I sometimes give to my Superb3, since it makes me think to a White Whale ) stopped on it own ~2" before hitting the box.

Well everything is fine now and it didn't cost me a single €! Happy with it!

 

The other good news, is that I don't need to upgrade my Micro-CAN VCDS to a HEX-V2 version, at least for a while!