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Post by hawkeyemk7r on Feb 15, 2022 20:12:47 GMT
So…. I love OBD eleven and have successfully enabled a whole host of awesome features on my R. In doing so I must’ve done something that jacked up my rear view camera. Now when I put the trans in reverse (DSG) the optical parking sensor overlay will display, but the rear latch doesn’t open and of course there is no camera feed.
I’ve searched for hours all over and I can’t find any help on this. Thoughts anyone??? I’m stressing out over this…
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Post by dv52 (Australia) on Feb 15, 2022 21:53:34 GMT
hawkeyemk7r : Are you aware that OBD11 keeps a record of every change that you make manually in History. And you don't even need to connect to the dongle to see these records - just access via my garage.
I suggest that you search through these records and revert any changes that even vaguely relate to the camera in the hex5F module (MIB)
Don
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Post by hawkeyemk7r on Feb 15, 2022 23:17:31 GMT
Hey DV, I’ll give that a try, thanks for the advice!
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Post by hawkeyemk7r on Feb 16, 2022 0:03:31 GMT
So I went through and reversed all the changes with no luck. Any other suggestions?
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Post by dv52 (Australia) on Feb 16, 2022 1:27:46 GMT
post-up the history file - like this:  |
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Post by hawkeyemk7r on Feb 16, 2022 2:10:01 GMT
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Post by dv52 (Australia) on Feb 16, 2022 9:15:39 GMT
Nothing stands out - I can see where you made changes to the camera - then reverted the change
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Post by hawkeyemk7r on Feb 16, 2022 10:18:03 GMT
If it helps, I don’t believe my reverse lights are turning on either
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valk
Full Member
Posts: 112
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Post by valk on Feb 16, 2022 13:54:50 GMT
Maybe this is an hardware issue, where the sensor (or micro switch) in the dsg that should detect de reverse, is not working (properly).
Edit:
This is what your scan shows:
‘ Faults:
P173400 - Starter release from the selector lever sensor system’
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Post by hawkeyemk7r on Feb 16, 2022 19:34:30 GMT
I just cleared everything and went for a drive to see what faults would come back, zero faults, so I'm not thinking its a trans problem. I do notice, however, that when I go into R, my white reverse light is not coming on... would this possibly be tied in with my backup camera and be the issue here?
Is there coding specific to that light activating or not that I may have inadvertently modified? I did use the urbanjoke app for the tail lights... may disable that to see if that gets me anywhere.
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valk
Full Member
Posts: 112
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Post by valk on Feb 16, 2022 21:07:53 GMT
To answer you question, i need to have some more info on your car.
Do you have a lowline or highline camera?
Where is your car from? (North America or Europe for example)
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Post by dv52 (Australia) on Feb 16, 2022 21:59:07 GMT
I do notice, however, that when I go into R, my white reverse light is not coming on... would this possibly be tied in with my backup camera and be the issue here? Is there coding specific to that light activating or not that I may have inadvertently modified? I did use the urbanjoke app for the tail lights... may disable that to see if that gets me anywhere. Yes it certainly is tied to the problem. Here is a very cut-down wiring diagram for the rear view camera (R189):
I have circled the pin on J519 (this is the central electrics module in OBD11 speak). This pin also supplies the right-side reversing light and it is the pin that opens the camera gate in the rear badge to start the image on the MIB (which is J749 in my picture)
So- bottom line, if Leuchte29RFL RA64 isn't working properly - the right side revere light won't illuminate and the rear view camera won't work
Post-up pictures of Leuchte29RFL RA64 - to be clear, I need to see ALL 19 x adaptation channels
Don
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Post by dv52 (Australia) on Feb 16, 2022 22:10:46 GMT
Maybe this is an hardware issue, where the sensor (or micro switch) in the dsg that should detect de reverse, is not working (properly). Edit: This is what your scan shows: ‘ Faults: P173400 - Starter release from the selector lever sensor system’ Thanks for contributing to the dialogue (many minds are always useful) On MQB platform cars, the RVC is operated by the central electrics module (see my wiring diagram in my previous reply) - but yes, it's all initiated by a reversing switch, albeit the messages between the auto-trans module and central electrics module are CAN based on these cars. To answer you question, i need to have some more info on your car. Do you have a lowline or highline camera? Where is your car from? (North America or Europe for example) This is a low-line rear view camera - notice that OP scans don't include a module @ address hex6C
Not sure if car is NAR, or EU/RoW?
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Post by hawkeyemk7r on Feb 16, 2022 22:10:54 GMT
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Post by dv52 (Australia) on Feb 16, 2022 22:34:51 GMT
hmm........ the Leuchte-set looks perfect for an incandescent lamp I've just re-read your post and you say that both reverse lights aren't working - so the problem is clearly deeper in the auto-trans module. The "P173400 - Starter release from the selector lever sensor system" fault is intermittent - Is the RVC problem permanent, or does it sometimes work when you shift into reverse?
Also, did the transmission reset APP finish correctly?
Don
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Post by hawkeyemk7r on Feb 16, 2022 22:39:56 GMT
Backup cam problem is persistent, trans reset finished properly in the app.
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Post by hawkeyemk7r on Feb 17, 2022 1:57:52 GMT
Here is a clip showing exactly what happens when I go to put it into reverse...
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Post by dv52 (Australia) on Feb 17, 2022 4:46:04 GMT
hawkeyemk7r : OK - the reverse light does nothing in your video!!!
I don't mean any offense, but is this simply a fuse problem? According to my wiring diagrams for RoW mk7s, the reverse switch (it's called "F4") works by switching +ve volts onto a pin on the central electrics module. Here's the arrangement: I'm not sure what fuse is used on NAR models - but might be prudent to check.
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Post by hawkeyemk7r on Feb 17, 2022 5:06:45 GMT
I’m not sure which fuse that would be. Where would I get that info?
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Post by hawkeyemk7r on Feb 17, 2022 5:18:09 GMT
I popped out the “SC34” fuse but that was fine. I’m unsure if that’s the one I should’ve been searching for though.
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Post by hawkeyemk7r on Feb 17, 2022 21:15:34 GMT
Don, I have an idea... would the dealer be able to flash the control modules in the car back to factory settings according to my VIN?
I would need to go back with my OBDeleven and add back in the cool features that I had enabled, but that's quite easy. It seems this may be the only solution to this issue.
It's my theory that the transmission module for some reason is no longer sending the "reversing signal" to J519, which is then not activating the reverse lights, or actuating the rearview camera. I have a very hard time believing that it is a part that needs to be replaced, since this only occurred after some light coding, either trying to enable high beam assist or traffic sign recognition. That is precisely when this problem started to occur.
Many thanks for all the help you've already provided, it is EXTREMELY appreciated.
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Post by dv52 (Australia) on Feb 18, 2022 1:29:12 GMT
hawkeyemk7r : So here's the thing - I don't get to see many "Yankee" model mk7's down here in the very deep south (in fact, I haven't seen any!)  . My hunch would be that NAR mk7s have the fuse in the same position - but I'm guessing!! Yes- dealers are able to re-build module firmware back to factory values via a VIN. Happens quite frequently when they need to change a faulty module. I have no idea how much this costs up there in the land-of-the-free - but down here in the very deep south , the price is generally near the annual budget of a small African nation!! It's my theory that the transmission module for some reason is no longer sending the "reversing signal" to J519, which is then not activating the reverse lights, or actuating the rearview camera. I have a very hard time believing that it is a part that needs to be replaced, since this only occurred after some light coding, either trying to enable high beam assist or traffic sign recognition. That is precisely when this problem started to occur. I understand your conviction that the fault is coding based and in the transmission module - but I'm not sure!
At least as far as the reverse switch is concerned- yes, the switch is physically part of the gear-box housing and it's physically operated by the mechanism inside the gear-box - but that's it!!
Electrically on a mk7 and as per my wiring diagram, the +12 Volt switched signal from F4 is directly wired into the BCM.
Of course, other modules need to know that reverse gear has been selected - but as I have said to valk "messages between the auto-trans module and central electrics module are CAN based on these cars".
So, for MQB platform cars, the central-electrics module initiates the reverse gear CAN signal to other modules; these CAN messages are not initiated in the auto-trans module.
As for the fault happening coincident with your lighting coding - maybe happenstance? I can't see a connection between BOTH reverse lights not working and the lighting functions that you mention above.
If this was my car and before I threw money at a dealer - I would test to confirm if F4 is operating correctly. It's not difficult - just remove the connector and with the car in reverse (hand-brake ON, of course)- check for continuity across the 2 x pins on the switch (not on the connector).
The problem will be finding where the switch is physically located - this depends on the type of gear-box - maybe the web can help on your Yankee car?
Don
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Post by hawkeyemk7r on Feb 18, 2022 2:00:22 GMT
Don - many thanks for all of the information.
The next item I need to focus on is locating F4 so I can test that properly. I have a DQ250 DSG, any direction on where I might be able to locate that? I'll be scouring the internet as well for that information.
Assuming that F4 is fine, am I able to flash the BCM myself? It would cost me roughly $200 USD at the dealer to fix, not the end of the world, but would've got me an intake instead, sigh.
I really appreciate all the information and help you've given up to this point, I was extremely stressed out yesterday.
Cheers,
Mike
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Post by hawkeyemk7r on Feb 18, 2022 3:35:15 GMT
Don - successfully tested, and unit is fine. Off to the dealer it is!
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Post by dv52 (Australia) on Feb 18, 2022 3:56:20 GMT
According to your fellow countrymen "it is located under the battery/air box area, not that fun to get there, but not that bad either." - see HERE
Don
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Post by hawkeyemk7r on Feb 18, 2022 22:04:41 GMT
Would anyone have the factory long coding for central electronics? My R has driver assistance, DSG, ACC, all the options essentially. If I can find an identical car I could probably rectify this without going to the dealer.
Don... what are your thoughts on this?
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Post by dv52 (Australia) on Feb 18, 2022 22:37:10 GMT
hawkeyemk7r : Without intending any offense to your thinking process - I've been doing this stuff for many years and IMHO, the most important part of diagnostic fault finding is to shed any predetermined notion of cause! Or said another way - let the results of testing drive your conclusions (again, please don't be offended)! On MQB platform cars - the 35 x exterior lights are controlled by the hex09 module (i.e. the central electrics module). Regardless of the lamp, the basic high-level design of this control function is divided into two - like this;
- there is an input from each lamp to the hex09 module that tells it whether the light is switched ON/OFF, and
- there is a separate output from the hex09 module that supplies power to each lamp
So, the role of the hex09 module (for lighting) is to apply a predetermined logic to each separate lamp "output" pin based on the status of each of lamp "input" pins
The "output" from the hex09 module is determined by the Leuchte-set values and for the reverse lights on your car, these are as factory-set according to your screenshots
The "input" to the hex09 module for the reverse lights is F4 and whilst the behavior of these general "inputs" can be sometimes coded, this is NOT the case for the reverse light- because ALL cars (regardless of transmission options) MUST have a reverse light that operates the same for every vehicle (i.e. simple logic, F4=ON, or F4=OFF). So, there is no reason to make the reverse light user code-able!!
Bottom-line = at least for the operation of reverse-lights, I suspect the the hex09 values from other cars will be of little value!! 
But hey - I could be wrong (not unusual for this canard-noir)
Don
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Post by hawkeyemk7r on Feb 19, 2022 0:01:22 GMT
That completely makes sense, appreciate the insight. No offense taken, Im learning a lot about the platform.
All said…. I secured an appointment for a flash, $100 USD from my local VW dealer. They were very understanding and cool about everything. Im counting myself as lucky.
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Post by hawkeyemk7r on Feb 23, 2022 23:08:20 GMT
Happy to report problem was fixed after dealer reflashed central electronics to stock! Was only $99 USD too
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