CAN open circuit

[marott]

Hello, got my A5 3.0tdi 2008 CAPA stolen last year, now it was found and I got it back. Luckly there is no damages and it only run about 2k km.
MMI isn't working, with VCDS I see open circuit in CAN gateway. Optical bus diagnostic mention navigation radio and phone error. I guess when they stole the car they did something to avoid sat track. I removed MMI central console and cables are hooked, I checked C pillar and it's hooked, also fin shark seems connected.
How can I find where the circuit is interrupted? Thanks

[Smac770]

If you have VCDS, then do a full autoscan, save the log to a file, post the file contents here so everyone can work from the same base factual information.

[marott]

Here it comes.
thanks


Sunday,28,May,2023,23:54:06:00009
VCDS -- Windows Based VAG/VAS Emulator Running on Windows 10 x64
VCDS Version: 23.3.0.0
Data version: 20230228 DS346.1
www.Ross-Tech.com


VIN: WAUZZZ8xxxxx License Plate: LAST
Mileage: 212780km-132215mi Repair Order:



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


Chassis Type: 8T-AU48 (8T0)
Scan: 01 03 05 07 08 09 0E 10 15 16 17 19 1E 37 42 46 47 52 53 55
56 77

VIN: WAUZZZ8Txxxxx Mileage: 212780km-132215miles

01-Engine -- Status: Malfunction 0010
03-ABS Brakes -- Status: OK 0000
04-Steering Angle -- Status: OK 0000
05-Acc/Start Auth. -- Status: OK 0000
07-Control Head -- Status: Cannot be reached 1100
08-Auto HVAC -- Status: Malfunction 0010
09-Cent. Elect. -- Status: Malfunction 0010
0E-Media Player 1 -- Status: Cannot be reached 1100
10-Park/Steer Assist -- Status: OK 0000
15-Airbags -- Status: OK 0000
16-Steering wheel -- Status: OK 0000
17-Instruments -- Status: OK 0000
19-CAN Gateway -- Status: Malfunction 0010
1E-Media Player 2 -- Status: Cannot be reached 1100
37-Navigation -- Status: Cannot be reached 1100
42-Door Elect, Driver -- Status: Malfunction 0010
46-Central Conv. -- Status: OK 0000
47-Sound System -- Status: Cannot be reached 1100
52-Door Elect, Pass. -- Status: OK 0000
53-Parking Brake -- Status: OK 0000
55-Headlight Range -- Status: OK 0000
56-Radio -- Status: Cannot be reached 1100
77-Telephone -- Status: Cannot be reached 1100

-------------------------------------------------------------------------------
Address 01: Engine (J623-CAPA) Labels:| 059-907-401-V1.clb
Part No SW: 8K0 907 401 F HW: 8K0 907 401
Component: 3.0TDI EDC17 H01 0004
Revision: --H01--- CVN: 5DDD71BE
Coding: 0114002C180F0118
Shop #: WSC 06325 000 00000
ASAM Dataset: EV_ECM30LTDIA5 A02004
ROD: EV_ECM30LTDIA5_A02.rod
VCID: 2E53BBBF71174CE361-807A
VINID: 9D196AAAA2242484400C60460068DDB1E2

1 Fault Found:
4875 - EGR Coolant Pump
P149C 00 [039] - Open Circuit
Not Confirmed - Tested Since Memory Clear
Freeze Frame:
Fault Status: 00000001
Fault Priority: 2
Fault Frequency: 1
Mileage: 212784 km
Date: 2023.05.28
Time: 22:08:36

Engine RPM: 0.00 /min
Normed load value: 0.0 %
Vehicle speed: 0 km/h
Coolant temperature: 30 °C
Intake air temperature: 26 °C
Ambient air pressure: 990 mbar
Voltage terminal 30: 12.060 V
Unlearning counter according OBD: 40
Engine speed: 0.0 /min
Vehicle speed: 0.00 km/h
Exh t Adap T Trbn Us: 33.5 °C
AFS dm: 0.0 kg/h
Coolant temperature: 30.4 °C
Inj Ctl q Curr: 0.00 mg/stroke
Field regeneration status-Bits 0-7: 00000000
Field regeneration status-Bits 0-7: 00000000
Field regeneration status-Bits 0-7: 00000000
Field regeneration status-Bits 0-7: 00000000

Readiness: 0 0 0 0 1

-------------------------------------------------------------------------------
Address 03: ABS Brakes (J104) Labels:. 8K0-907-379-V1.clb
Part No SW: 8K0 907 379 S HW: 8K0 907 379 S
Component: ESP8 quattro H04 0210
Revision: -------- Serial number: --------------
Coding: 1B0D00
Shop #: WSC 06325 000 00000
VCID: 4999E823E0B90BDB54-801C

No fault code found.

-------------------------------------------------------------------------------
Address 05: Acc/Start Auth. (J393) Labels:. 8K0-907-064-05.clb
Part No SW: 8K0 907 289 C HW: 8K0 907 289 C
Component: BCM2.01 H38 0253
Revision: 00003002
Coding: 030000
Shop #: WSC 06325 000 00000
VCID: 397998E3B0599B5BC4-806C

Subsystem 1 - Part No SW: 4H0 959 754 DD HW: 4H0 959 754 DD
Component: FBSAUDID4 IDG H71 0083
Serial number: 0813000008566002

Subsystem 2 - Part No SW: 8K0 905 852 C HW: 8K0 905 852 C
Component: ELVAUDIB8 H35 0039
Serial number: 0208000000924013

No fault code found.

-------------------------------------------------------------------------------
Address 07: Control Head
Cannot be reached

-------------------------------------------------------------------------------
Address 08: Auto HVAC (J255) Labels:. 8Tx-820-043-3Z.clb
Part No SW: 8T1 820 043 R HW: 8T1 820 043 R
Component: KLIMA 3 ZONEN H05 0120
Revision: C1000000 Serial number: 0121.02.080149
Coding: 36020000
Shop #: WSC 06325 000 00000
VCID: 408FF507D383CA9383-8014

1 Fault Found:
01592 - Air Quality Sensor (G238)
004 - No Signal/Communication
Freeze Frame:
Fault Status: 01100100
Fault Priority: 6
Fault Frequency: 1
Reset counter: 253
Mileage: 212784 km
Time Indication: 0
Date: 2023.05.28
Time: 22:08:08

Freeze Frame:
Temperature: 21.0°C


-------------------------------------------------------------------------------
Address 09: Cent. Elect. (J519) Labels:. 8K0-907-063.clb
Part No SW: 8K0 907 063 D HW: 8K0 907 063 D
Component: BCM1 1.0 H21 0253
Revision: 05021001 Serial number: 00000000007009
Coding: 260050914014BF211709000300005D5D4F9C03880001014100 0000
Shop #: WSC 06325 123 12345
VCID: 306FA5C763235A1373-8064

Subsystem 1 - Part No SW: 8T1 955 119 C HW: 8J1 955 119 Labels: 1KX-955-119.CLB
Component: WWS 190108 H13 0040
Serial number: SWFBIE 0000407
Coding: 00FD11

Subsystem 2 - Part No SW: 8K0 955 559 HW: 8K0 955 559 Labels: 8K0-955-559.CLB
Component: RLS H04 0003
Serial number: 10067751
Coding: 02532C

Subsystem 3 - Part No SW: 8K0 941 531 G HW: 8K0 941 531 G
Component: E1 - LDS H07 0070
Serial number: 00000000000303080073

4 Faults Found:
00978 - Lamp for Low Beam; Left (M29)
012 - Electrical Fault in Circuit - Intermittent
Freeze Frame:
Fault Status: 00101100
Fault Priority: 2
Fault Frequency: 1
Reset counter: 38
Mileage: 212784 km
Time Indication: 0
Date: 2023.05.28
Time: 22:10:00

00979 - Lamp for Low Beam; Right (M31)
012 - Electrical Fault in Circuit - Intermittent
Freeze Frame:
Fault Status: 00101100
Fault Priority: 2
Fault Frequency: 1
Reset counter: 38
Mileage: 212784 km
Time Indication: 0
Date: 2023.05.28
Time: 22:10:00

01592 - Air Quality Sensor (G238)
004 - No Signal/Communication
Freeze Frame:
Fault Status: 01100100
Fault Priority: 3
Fault Frequency: 1
Reset counter: 253
Mileage: 212784 km
Time Indication: 0
Date: 2023.05.28
Time: 22:10:00

03207 - Charisma Switch Module
004 - No Signal/Communication
Freeze Frame:
Fault Status: 01100100
Fault Priority: 3
Fault Frequency: 1
Reset counter: 253
Mileage: 212784 km
Time Indication: 0
Date: 2023.05.28
Time: 22:10:00


-------------------------------------------------------------------------------
Address 0E: Media Player 1
Cannot be reached

-------------------------------------------------------------------------------
Address 10: Park/Steer Assist (J446) Labels:. 8K0-919-475.clb
Part No SW: 8K0 919 475 B HW: 8K0 919 475
Component: PARKHILFE 4K H06 0010
Revision: 11001001 Serial number: 75330805916431
Coding: 100001
Shop #: WSC 06325 123 12345
VCID: 387F9DE78B5382533B-806C

No fault code found.

-------------------------------------------------------------------------------
Address 15: Airbags (J234) Labels:| 8K0-959-655.clb
Part No SW: 8K0 959 655 B HW: 8K0 959 655 B
Component: AirbagVW-AU10 H26 0410
Serial number: 0038JD13HLHG Dataset Number: 8T0909602C 0020
Coding: 30313433363030303030554A304C38543053
Shop #: WSC 06325 000 00000
ASAM Dataset: EV_AirbaECUVWAUDI010 A02007
ROD: EV_AirbaECUVWAUDI010_A02.rod
VCID: 3C7781F7B76BAE73DF-8068

Crash sensor for side airbag: driver side:
Serial number: 6334MSME37004B58B

Front Passenger's Side Airbag Crash Sensor:
Serial number: 6344MSME2A204B4DK

Rear Side Airbag Crash Sensor (on driver's side):
Serial number: 6352QSME4E07057BP

Passenger side rear thorax airbag crash sensor:
Serial number: 6362QSME4E715737Q

Crash sensor for front airbag: driver side:
Serial number: 63732SME51301F4D+

Crash sensor for front airbag: front passenger side:
Serial number: 63832SME4D0F4C39H

No fault code found.

-------------------------------------------------------------------------------
Address 16: Steering wheel (J527) Labels:. 8K0-953-568.clb
Part No SW: 8K0 953 568 F HW: 8K0 953 568 F
Component: Lenks.Modul H11 0012
Revision: -------- Serial number: 90315HBO000F4
Coding: 000016
Shop #: WSC 06325 000 00000
VCID: 3D718CF3A471A77BE8-8068

Component: E221 - MFL H02 0003

No fault code found.

-------------------------------------------------------------------------------
Address 17: Instruments (J285) Labels:. 8T0-920-xxx-17.clb
Part No SW: 8T0 920 931 A HW: 8T0 920 931 A
Component: KOMBIINSTR. H28 0216
Revision: 00000000 Serial number: 71X11A038
Coding: 030501000300000C040100
Shop #: WSC 06325 123 12345
VCID: 356194D39C417F3B20-8060

No fault code found.

-------------------------------------------------------------------------------
Address 19: CAN Gateway (J533) Labels:. 8T0-907-468.clb
Part No SW: 8T0 907 468 F HW: 8T0 907 468 F
Component: GW-BEM 4CAN-M H07 0084
Revision: EB002032 Serial number: 3200E08220836C
Coding: 000003
Shop #: WSC 64882 141 62541
VCID: 4487F917C79BD6B3A7-8010

Subsystem 1 - Part No SW: 8K0 915 181 B HW: 8K0 915 181 B
Component: J367-BDM H03 0150
Serial number: 18007508060208

1 Fault Found:
00384 - Optical Databus
011 - Open Circuit
Freeze Frame:
Fault Status: 01101011
Fault Priority: 5
Fault Frequency: 1
Reset counter: 253
Mileage: 212784 km
Time Indication: 0
Date: 2023.05.28
Time: 22:08:38


-------------------------------------------------------------------------------
Address 1E: Media Player 2
Cannot be reached

-------------------------------------------------------------------------------
Address 37: Navigation
Cannot be reached

-------------------------------------------------------------------------------
Address 42: Door Elect, Driver (J386) Labels:. 8K0-959-793.clb
Part No SW: 8K0 959 793 HW: 8K0 959 793
Component: TSG FA H09 0149
Revision: Serial number: cF†
Coding: 011C022250002201
Shop #: WSC 06325 000 00000
VCID: 7DF14CF3E4F1677BA8-8028

1 Fault Found:
03297 - Switch in Lock Cylinder; Driver Side
008 - Implausible Signal
Freeze Frame:
Fault Status: 01101000
Fault Priority: 3
Fault Frequency: 1
Reset counter: 253
Mileage: 212784 km
Time Indication: 0
Date: 2023.05.28
Time: 22:08:06


-------------------------------------------------------------------------------
Address 46: Central Conv. (J393) Labels:. 8K0-907-064-46.clb
Part No SW: 8K0 907 289 C HW: 8K0 907 289 C
Component: BCM2.01 H38 0253
Revision: 00003002 Serial number: 0108398555
Coding: 011A0680003A04C0012000
Shop #: WSC 06197 000 00000
VCID: 397998E3B0599B5BC4-806C

Subsystem 1 - Part No: 8K0 951 177
Component: DWA-Sensor H02 0030

Subsystem 2 - Part No: 1K0 951 605 C
Component: LIN BACKUP HO H03 1301

No fault code found.

-------------------------------------------------------------------------------
Address 47: Sound System
Cannot be reached

-------------------------------------------------------------------------------
Address 52: Door Elect, Pass. (J387) Labels:. 8K0-959-792.clb
Part No SW: 8K0 959 792 HW: 8K0 959 792
Component: TSG BF H09 0149
Revision: Serial number: pG…
Coding: 011C02225C002201
Shop #: WSC 06325 123 12345
VCID: 7CF741F7FFEB6E739F-8028

No fault code found.

-------------------------------------------------------------------------------
Address 53: Parking Brake (J540) Labels: 8K0-907-801-V1.clb
Part No SW: 8K0 907 801 D HW: 8K0 907 801 D
Component: EPB Audi B8 H04 0050
Revision: 00000003 Serial number: 10000000001292
Shop #: WSC 00000 000 00000
VCID: 306FA5C763235A1373-8064

No fault code found.

-------------------------------------------------------------------------------
Address 55: Headlight Range Labels: 8K0-907-357.clb
Part No: 8K0 907 357 B
Component: Dynamische LWR H01 0010
Revision: 00000001 Serial number:
Coding: 0000002
Shop #: WSC 06324 000 00000
VCID: 3467A9D7573B663317-8060

No fault code found.

-------------------------------------------------------------------------------
Address 56: Radio
Cannot be reached

-------------------------------------------------------------------------------
Address 77: Telephone
Cannot be reached

End-------------------------(Elapsed Time: 04:01)--------------------------

[Smac770]

You did a ring break diagnosis. Were all the modules OK for electrical? Just the three you noted were Not OK for optical? Anything that failed electrical needs to be directly diagnosed: is the unit present, does the unit have power/ground.

As for the MOST ring, for MMI 2G:
J533 CAN gateway [ring diag master] // 19-can gateway; in dash between center stack and glove box >>
J523 MMI 2G [ring timing master] // 07-control head; in dash behind climate controls >>
R41 cd changer // 0E-media player 1; in dash above climate controls >>
R199 AMI // 1E-media player 2; in glove box >>
R36 bluetooth // 77-telephone; under front right seat >>
J525 amp // 47-sound system; in back left stack on top >>
R analog radio // 56-radio; in back left stack in middle >>
R78 tv tuner // appears you do not have this unit >>
J401 navigation // 37-navigation; the disc drive in the back left stack >>
R147 digital radio (Euro) / R146 sat radio (NAR) // 0F-digital radio; appears you do not have this unit >>
J533...

nav, radio, and phone. Curious. It would make sense if amp was also in that list.

So if you unplug the optical cable from the amp, you see a red light on one of the optical cable ports? That should be light from the upstream device, the R36. If then check the cable plugged into the radio unit, you should see no light. Now plug the cable back into the amp, and now you should see light on the plug for the radio (the amp is the upstream device from the radio, so the radio only sees the light if the cable is plugged in and the amp is powered/working).

To check the most basic of the front end, you could find the MOST ring junction in the back behind the cd changer and MMI controller and put a bypass plug on it and see if the MMI comes up (missing radio, telephone, and audio functions, but CAR should work, etc). If that works well, then you can move to using bypass plug on the optical cable port for the devices in the back left one by one to see which when bypassed things work. The R36 unfortunately, it not so easy to access.

J519 is saying drive select switch is not connected; is the drive select switch still there below the cd changer? You might need to check the cable is connected.

[marott]

Thanks a lot today I'd get a fiber loop and once I'm back at home I can do more test. Btw when I removed the cd charger I could see red light on fiber, would it be correct to say that J523 --> J533 --> R41 there is no optical interruption? Later on I'll post optical fiber diagnosis with the loop and another scan.
Thanks again for your help

[Smac770]

If you see red light on the fiber cable at a particular port, that means the immediate upstream device (J523 MMI 2G control module in this instance) is powered and able to produce light output.

And that assumption of order is based on all the cables being plugged back in where they belong. The ring will work so long as all the cables are plugged in and the devices are working regardless. But our map of presumed device order is only correct if the cables are all plugged in where they should be.

The dash devices are all in a line, then it passes through that junction I mentioned to the rest of the car, coming back to the junction from the J401 in your case and back to the dash devices.

[marott]

what's the route of fiber after the BT under the passenger seat? I saw fiber connection under C pillar, on read of driver side. Btw, since the case is that thieves just disconnected or cut the fiber, where that would be more easy and quick to do? I see that fuse box compartment in driver side has been opened and forced. but I can't see fiber going there. I see some disconnected cables I'd post a picture. One seems SAT radio cable which I don't have, other 2 are white and another black one looks like alarm of the car.
Thanks again

[marott]

Here found on my phone pics I took some days ago of those cables.

[marott]

better here you see them all.

[marott]

more info
thanks

Control Module Part Number: 8T0 907 468 F
Component and/or Version: GW-BEM 4CAN-M H07 0084

Optical Bus Diagnostic : Standard

Controller Electrical Optical
19-CAN Gateway OK ERROR
07-Control Head(High/D3) OK OK
0E-Media Player 1 ERROR ERROR
1E-Media Player 2 ERROR ERROR
77-Telephone ERROR ERROR
47-Sound System OK ERROR
56-Radio ERROR ERROR
37-Navigation ERROR ERROR

************************************************** **********

[Smac770]

Are those optical or RF? Those look like FAKRA connector RF cables, such as https://www.ebay.com/itm/382685736728

The optical cables will tend to be orange and in flex loom, such as https://www.ebay.com/itm/165027592363

I don't know why you'd have ends of RF cables there next to fuse panel C (driver's end of dash, I assume this is a left hand drive vehicle given the pic?). Could be they are always installed but only connected if relevant devices are equipped.

The only control module there is the J519, and the J285 instrument cluster, but neither of those have FAKRA jacks. If the ends are supposed to be joined with a union, I don't know who would go to who offhand. But those FAKRA wires would not be related to the MOST ring.

You can see an example of the union (plug T2bg) of the dash side optical loop (upper) and rest-of-car side optical loop (lower) in this image: https://postlmg.cc/bGbpyvfT
In red here: https://www.audizine.com/forum/showthread.php/954694-MMI-is-Dead!?p=14755776&viewfull=1#post14755776
(this guy was doing other work, so a lot more apart than probably what your guys were doing)


The FAKRA lines going to the front would go to the J523 MMI 2G control module. But the only one would be the for the backup camera. If you pull the FAKRA off the J523 and the backup camera module in the right rear, does it ring out as complete? Should be the green plugs.

[Smac770]

Keep in mind you can't remove the J523 from the optical loop. It is the ring master, no J523, no anything. In your pic, right behind, you see the T2bg plug that connects the dash half of the ring (the upper plug) and the rest of the car half of the ring (the lower plug). So all the optical errors are logical.

But I don't understand why electrical error for the other devices. Is the ignition off?

The J533 CAN gateway is hardwired to all the MOST devices. Since the MOST ring, if it's down, takes out diagnostic communication to all MOST devices because none of them have CAN bus connections (including the ring master J523), there's a ring break diagnosis process, using that hard line from the J533 to each MOST device.

When the J533 sends out the ring break diagnosis pulse, all the devices respond with two things: am I ok such as have power (electrical), and do I see the light from the preceding device (optical).

The ring break line passes from the dash half to the rest of the car half via pin 1 of plug T17d (17-pin brown plug at the base of the driver's side a-pillar); the wire is green/violet.

[marott]

Ignition is on, engine off. so as long as those cut cables have nothing to do with the problems let's forget about it for now.
As I told, my car was stolen...right now my 2 original keys are not working. I am using the key used by the thieves which was in the car when i got it back. So I am trying to figure out what they could have cut, I guess they did that to avoid sat tracking. Surely it must be something where they didn't need to tear apart the car and I've the feeling it's something under the steering wheel.

[marott]

I connected the loops there https://postlmg.cc/bGbpyvfT one of the disconnected side the other on the upper side

[marott]

I tried in the boot disconnected fiber (1) from 2, connected the loop and still nothing, so far 1 doesn't have light at all.
So from the front where I see fiber light which is the route of the fiber in order to get to the boot?
Does it go via driver side (lhd) or passenger side?
thanks

[marott]

ah sorry I see fiber light here, thought I did post that already.

[marott]

Also from there, no fiber light. what if I connect the fiber with light from panasonic to that connector?
would it be silly or vaguely useful for testing? I'm collecting only failures, no matter what I do :-(

[Smac770]

It's a loop, just needs to be followed. Take the ring break list:

19-CAN Gateway >
07-Control Head >
0E-Media Player 1 >
1E-Media Player 2 >
plug T2bg >
77-Telephone >
47-Sound System >
56-Radio >
37-Navigation >
plug T2bg >

So each device plug has two cables, one coming from the previous unit, one going to the next unit. So if you pull the plug and look, if you do not see red light on one cable, it's not coming from the previous device as it should. So you need to move to that device and see if it is putting out red light on one of its ports.

We see the left rear stack in your pic. That's 47-sound system (J525) on top, 56-radio (R) in the middle, and 37-navigation (J401) on the bottom.

We see the plug T2bg in your last pic. The upper half should have red light on one cable, that's the light coming from the R199 AMI in the glove box. The lower half should have red light on the other cable path, that's the light coming from the J401 drive.

The second pic of the plug and the CD changer (0E media player 1), that's just confirming light from the J523 (07 control head). Ok, so put that back.

If you separate the T2bg, do you see one light on each half? If not, what's before the T2bg upper plug half? The AMI device in the glove box, so go there.

If you do have red light on the upper T2bg half, but no red light at the amp, then what's before the amp? Not the T2bg, it's the 77-telephone (R36), under the front passenger seat.

The R36 and J401 both get power from the same fuse, fuse 3 in column "C" [brown] in the right rear "fuse panel F". 7.5A; have you checked that fuse?

[Smac770]

As for keys, you'd have to assess if they redid the immobilizer adaptation and removed the old keys. Which is probably what they did. So to add the old keys back, you'd need to do an immobilizer adaptation. Not sure what Audi servers will do if the vehicle is previously reported stolen. I think up to 8 keys can be adapted to the J393, but only 4 can be enabled at a time? Probably need a dealership or shop with immobilizer adaptation privilege to connect and assess the current state of the immobilizer programming. Could be the old keys are still adapted to the J393, just not enabled.

[marott]

Thanks tomorrow I will do more tests, the t2bg doesn't have light on the lower half, didn't check the upper half as it's fixed on the panel. So I'll checl first upper half.
I checled fuses last week, but I'll check again. I understood that if it's a problem with fuses the screen of MMI wouldn't start at all, in my case it shows splash screen only for few seconds then goes off.

[marott]

I mentioned the keys just to give all possible information, my 2 original keys from audi don't work and I'm using the one they coded to steal the car but that's not an issue right now :-)
As I said the car has been stolen and prolly they wanted SAT nav off
So being in thief pants what would be the quickest way to interrupt NAV ? I suspect that's the reason for my problem.
Also the car was parked for 8 months in police deposit before I got it back, of course I had to put a new battery.

[marott]

ok I could not resist, and did a quick test. Apparently the control head is not reachable with vcds scan, whicle is ok with optical diag bus.
Optical Bus Diagnostic : Standard

Controller Electrical Optical
19-CAN Gateway OK ERROR
07-Control Head(High/D3) OK OK
0E-Media Player 1 ERROR ERROR
1E-Media Player 2 ERROR ERROR
77-Telephone ERROR ERROR
47-Sound System OK ERROR
56-Radio ERROR ERROR
37-Navigation ERROR ERROR

I could see red light on fiber disconnected and I think also if I'm not wrong, red light coming out from control head back. So far of course AMI fiber doesn't have light.
I wonder why control head is unreachable via vcds but reports ok ok from fiber diag, what do you suggest as next steps?
Thanks again for the help

[Smac770]

The car is B8.0; there's no infotainment cellular emissions of any manner on the vehicle. There's nothing to disable, nothing that is trackable. Even on B8.5 if it had MMI 3G+, UTSM is going down; even the cellular on it is not workable these days.

But in some markets, Audi had the option for a full mobile phone installation in the vehicle. Do you have that? The scan cannot report the p/n info for 77-telephone since the MOST is down, so I can't see if it's just a normal Bluetooth R36 or a full cellular R36+R86+R126. If they saw evidence of the built-in mobile phone, I could see them trying to sever the RF connection to the cellular aerial. They should have just pulled the fuse 3.

But "sat nav", there's no interaction off car for that, not in MMI days.

[Smac770]

The ring break diagnosis is done via hard wires, not the optical bus. All the MOST members are on the ring break electrical bus. When the J533 CAN Gateway sends out a pulse, everyone responds at predefined interval two things "am I ok electrically, do I see the light from the predecessor". And that is pinged back on the ring break bus, not the MOST ring, which is down.

All the optical plugs have to be in place on the devices for the ring break diagnosis to mean anything. That test right there says the CD changer sees no light from the J523. If you pull the optical plug off the CD changer, there was light on the cable port, no? The plugs to the J523 and cd changer and J533; they're all right there together, got to make sure the right one gets on the right device.

Does the CD changer appear to be powered? If you press buttons on it, do you see light, hear action; can you load a disc? It report says electrical error from the CD changer, which doesn't make a lot of sense unless it's unpowered.

Assuming you have the glove box out so you can get to the J533 easily and access it's red 20-pin plug, the ring break line on it is pin 10, green/violet. On the CD changer is an 8-pin plug. The ring break line on it is pin 5. Do you test continuity from the J533 pin 10 to the R41 pin 5? Pulling plugs like this, you'll want the car off first. These should test continuous to J523 16-pin pin 14, and R199 AMI 8-pin pin 5 also.

If you throw a bypass loop on that upper half of the T2bg plug, that will isolate the ring to just the dash components. MMI should come up at that point and those four devices should all look good.

[marott]

The car itself has the mobile socket under the central armrest. Never even tried to use it actually.
Do you mean fuse 3 for MMi in the passenger side fuse box? II'll replace it just in case.

Btw the info about the car are those.


E4J = "S-line"
7UG = Navigation system - High
4UE = Air bag for driver and front seat passenger
6XE = Exterior mirrors: electrically foldable and electrically adjustable/heated
5SL = Left exterior mirror: aspherical
6TS = Right exterior mirror: aspherical, large viewing field
1KW = Disc brakes, rear
J0Z = Battery 520 A (110 Ah)
1LA = Disc brakes, front
1AT = Electronic stabilization program (ESP)
1BU = Shock absorption for sports design
3FA = Without roof insert (standard roof)
5TG = Decorative aluminum inserts, dulling
7X1 = Park distance control
F0A = No special purpose vehicle, standard equipment
8GU = Alternator 140 A
0G1 = Gearshift lever
0YF = Weight range 6 installation control only, no requirement forecast
0JG = Weight category front axle weight range 7
T41 = 6-cylinder diesel engine 3.0 L unit 059.D
8WZ = Front fog light preparation
8BP = Bi-functional headlight with gas discharge lamp
U2A = Instrument insert with km/h speedometer,radio-controlled clock, tachometer and trip odometer
X0A = National sales program Germany
1N3 = Speed-related variable steering assist (Servotronic)
2PU = Leather trimmed multi-function sports steering wheel
SQ3 = Comfort concept
9Q4 = Multi-function display/on-board computerwith check control
8Z5 = Not hot country
D50 = 6-cyl. turbo dies. eng. 3.0 l/176 kW 24VV6 TDI, common rail Base engine is T41/TE1/TF1/TH1
7Q2 = Navigation system with color screen
0SC = Labels/plates in English
7K6 = Flat tire indicator
4X3 = Side air bag front with curtain air bag
2K1 = Reinforced bumpers
3L3 = Manual height adjustment for front seats
4K0 = Radio remote controlled central locking operated from inside
3Y0 = Without roll-up sun screen
4K4 = Radio remote controlled central locking
5D7 = Carrier frequency 868 MHz without panic button
1SA = Without additional front underbody guard
7MB = Emission standard EU 4 plus
Q1D = Sports front seats

[marott]

The ring break diagnosis is done via hard wires, not the optical bus. All the MOST members are on the ring break electrical bus. When the J533 CAN Gateway sends out a pulse, everyone responds at predefined interval two things "am I ok electrically, do I see the light from the predecessor". And that is pinged back on the ring break bus, not the MOST ring, which is down.

All the optical plugs have to be in place on the devices for the ring break diagnosis to mean anything. That test right there says the CD changer sees no light from the J523. If you pull the optical plug off the CD changer, there was light on the cable port, no? The plugs to the J523 and cd changer and J533; they're all right there together, got to make sure the right one gets on the right device.

Does the CD changer appear to be powered? If you press buttons on it, do you see light, hear action; can you load a disc? It report says electrical error from the CD changer, which doesn't make a lot of sense unless it's unpowered.

Assuming you have the glove box out so you can get to the J533 easily and access it's red 20-pin plug, the ring break line on it is pin 10, green/violet. On the CD changer is an 8-pin plug. The ring break line on it is pin 5. Do you test continuity from the J533 pin 10 to the R41 pin 5? Pulling plugs like this, you'll want the car off first. These should test continuous to J523 16-pin pin 14, and R199 AMI 8-pin pin 5 also.

If you throw a bypass loop on that upper half of the T2bg plug, that will isolate the ring to just the dash components. MMI should come up at that point and those four devices should all look good.

I guess the cd charger doesn't have power at all, unlike the control head I never saw light coming out from fiber connection and nothing on the buttons. So that'd be a good reason for not seeing light on AMI. Could that be a just fuse in position 3 in the booth or it's just control head dead?

[Smac770]

On the PR codes list, yeah, that's from the vehicle identification sticker, which only has about 1/3 of all the PR codes for a VIN. You can get the complete list from Audi, direct or via a dealership.

Someone that actually has 1BU suspension, curious. I've never seen an actual instance of it being configured; we don't have it on this side of the planet.

It doesn't list 7D3 (cd changer) like my MY09 MMI 2G High vehicle. But that might simply be a code that got pushed off the short list by your other configuration options.

Unfortunately, like mine, neither the sound system code nor the telephony code made the short list. 9VD would be standard sound system and 9VK would be B&O sound system. Both come with an outboard J525 amp. Mine with simply the Bluetooth handsfree version of the R36 is 9ZG.


Everything gets power from exactly where it gets power.

passenger end of dash, column brown (term 30)
fuse 1 > R41 cd changer & R199 external audio input (AMI)
fuse 5 > J533 can gateway

passenger end of dash, column black (term 15)
fuse 5 > J533 can gateway

right rear, column "C" (term 30)
fuse 3 > R36 telephone / R radio / J401 navigation
fuse 4 > J525 amp
fuse 5 > J523 mmi 2g (I have no idea why they power this dash unit from a fuse back here)

So could be there's an issue with fuse 1 and both the R41 and R199 are unpowered. Check the voltage on the plugs themselves. For the R41 changer, it appears 12v goes to pin 2, ground is on pins 1 and 4? For the R199, it's a 12-pin plug with 12v on pin 7 and ground on pin 1.

[marott]

Ok finally a step forward

Control Module Part Number: 8T0 907 468 F
Component and/or Version: GW-BEM 4CAN-M H07 0084

Optical Bus Diagnostic : Standard

Controller Electrical Optical
19-CAN Gateway OK OK
07-Control Head ERROR ERROR
0E-Media Player 1 OK ERROR
1E-Media Player 2 OK OK
77-Telephone OK OK
47-Sound System OK OK
56-Radio OK OK
37-Navigation OK OK

************************************************** **********


now control head is not working, while yesterday it was working perhaps I did something stupid with fuses. Which is the fuse in charge for control head?
Here the pics of the 2 fuses boxes I touched, if you see 7.5a where you expect 5a that's coz this morning I didn't find 5a and the guy at the shop said 7.5 it's not a problem. Please advise if I'd get 5a, I can rush now somewhere else.
Thanks again for you help

[Smac770]

Yes, I'm familiar with the fuses. Your first pic is panel F, the "right rear". Your second pic is panel D, the "passenger end of dash". I detailed the relevant specific fuses in my prior post. Note, the fuses in both of these count "from the bottom". The fuses in the panel C, "driver end of dash", count from the top.

If we look at panel D column 1 (black), you have two 7.5A in there; all four should be 5A. So 1-4 empty, 5-8 5A, 9-12 empty.
If we look at panel D column 2 (brown), looks fine except the 7.5A in 1 should be a 5A.

So having 7.5A in place of 5A, is that an issue? From an intelligent mind perspective, no. But I do know of one thread where the guy said he replaced the 15A with a 7.5A and things started working (different fuse, in his case). I think he didn't give the whole story and something else was wrong with the 15A fuse or something else was additionally done.

Moving to the panel F picture:
column "B" (black): fuse 1 should be a 5A
column "C" (brown): fuse 3 is one of those new 7.5A, but it should be a 7.5A, so that's fine; the orange 5A in that column fuse 5 is the fuse for the J523
column "D" (red): looks fine

So all in all, I don't think you need to mess with fuses. Everything is fine enough.

If the J523 is lacking 12v at this point, you might need to recheck the plug to it, and the fuse for it. On the J523, the 20-pin plug, power on red/white on pin 1, ground on brown on pin 2. Do you measure 12v from 1 to 2 on the 20-pin plug?

[marott]

And finally it works, thanks a lot. I just replaced J523 fuse and everything works now. Prolly today I put a broken fuse in J523, since it was working yesterday.
Now someday I'd clean up the mess with fuses, for the front I have schema from the panel. For the booth I see several different indication, yours are different from the ones I find on the internet which are different again from what I found on Elsa, I'm a bit confused but that's not a problem at all right now.

Wednesday,31,May,2023,21:15:20:00009
VCDS -- Windows Based VAG/VAS Emulator Running on Windows 10 x64
VCDS Version: 23.3.0.0
Data version: 20230228 DS346.1
www.Ross-Tech.com


VIN: License Plate: OKKK


Control Module Part Number: 8T0 907 468 F
Component and/or Version: GW-BEM 4CAN-M H07 0084

Optical Bus Diagnostic : Standard

Controller Electrical Optical
19-CAN Gateway OK OK
07-Control Head(High/D3) OK OK
0E-Media Player 1 OK OK
1E-Media Player 2 OK OK
77-Telephone OK OK
47-Sound System OK OK
56-Radio OK OK
37-Navigation OK OK

************************************************** **********

So my friend, come to Italy you and your family be my guests :-) If I show up in Atlanta I'll invite you for dinner, but it's about 10 years I don't come to USA.
Btw today while waiting for your feedback I was bored and nothing else to test, so I decided to remove my ECU and read it with ktag, seems it works..so I'll have something else to play with/ Do you happen also to know about mapping? I know more or less what to change with the proper sw, but I've some doubts about the writing back the file, perhaps I can check on some other thread/forum

Thanks thanks and thanks again

[Smac770]

You have to be specific when talking fuses on a B8. B8.0 >MY09 (MMI 2G era) is different from B8.0 MY10> (MMI 3G era) is different from B8.5. I was using US spec MY08/MY09 A5 chart as a reference, from the Audi wiring diagrams. So RoW spec with a TDI might be a little different. But be sure to not be looking at MY10+ diagrams, which is most what I find on the Internet when looking up "B8 fuses".

Glad it's all resolved out, for the MOST part [:D]

Sorry, never played with ECM tuning. mhhauto.com has a lot of discussion involving the subjects of reprogramming and things. You might find relevant content and conversation there.

My nephew will actually be in Rome next month for a school trip. Closest I've been to Italy was a few weeks in Germany; they said don't take the rental to Italy, something about losing my tires. [;)]

Take care and good luck with the rest of the car.

[marott]

So having 7.5A in place of 5A, is that an issue? From an intelligent mind perspective, no. But I do know of one thread where the guy said he replaced the 15A with a 7.5A and things started working (different fuse, in his case). I think he didn't give the whole story and something else was wrong with the 15A fuse or something else was additionally done.



I read that thread you mention couple of weeks ago. Anyway just in case even if now everything is working I will put correct fuses.