2013 - C7 A6 Allroad - 03157 - Functionality limited due to Communications Disruption

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nugentp

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So I have this annoying fault code on the radio/media/nav unit (5F) aka "RMC" which seems to point to a comms problem in relation to instruments.
Strangely on the auto scan there is indication that the instruments (17) cannot be reached, but I can access it directly via VCDS easily.
When clearing the fault on 5F it returns in matter of seconds with same presentation.

No apparent loss of functionality that I can ascertain - there is clearly communications from the RMC to cluster in terms of what media is being played or nav info so its a bit odd.

I did run the optical bus diagnostics which does point to a fault:

Thursday,03,June,2021,14:28:01:30756
VCDS Version: Release 21.3.0
Control Module Part Number: 4G5 907 468 A
Component and/or Version: J533--Gateway H10 0028

Optical Bus Diagnostic : Standard

Controller Electrical Optical
CAN Gateway OK OK
Information Electr. OK OK
Instruments ERROR ERROR
Sound System OK OK

I have not recently changed any coding anywhere on the car so it points to some HW fault or poor connectivity.
To my knowledge neither the RMC or instruments have been removed.
I did lift the rear seat and checked the optical plugs on the CAN gateway are secure and there is no visible dirt at least.
Any pointers or next steps welcome as a general search of the 03157 fault didn't reveal anything useful in terms of corrective action !

Full scan below.

Eagle eyed viewers will see the BCM is coded for BiXenons (which I retrofitted and documented here as working fine a long time ago). I also added a higher spec gateway (well the dealership had to activate that thanks to the anti-DIY tactics of component protection) along with the adaptive headlamp controller which also all worked perfectly. After some months this communications error cropped up and I suspected it was caused by the 'new' CAN gateway causing some odd behaviour so I swapped back to the original factory gateway and verified the fault is still there... obviously this gateway doesn't have the CAN connection to the headlamp level controller (55).

Code:
Thursday,03,June,2021,15:22:27:30756
VCDS -- Windows Based VAG/VAS Emulator Running on Windows 7 x86(Parallels)
VCDS Version 21.3.0.0  HEX-NET CB: 0.4543.4
Data version: 20210226 DS325.0
www.Ross-Tech.com


VIN: WAUZZZ4G9DN00xxxx   License Plate: 


Chassis Type: 4G-AU57 (4G5)
Scan: 01 02 03 05 08 09 10 15 16 17 19 28 34 3B 42 44 46 47 52 53
          5F 62 72

VIN: WAUZZZ4G9DN00xxxx   Mileage: 178037km-110627miles

01-Engine -- Status: OK 0000
02-Auto Trans -- Status: OK 0000
03-ABS Brakes -- Status: OK 0000
04-Steering Angle -- Status: OK 0000
05-Acc/Start Auth. -- Status: OK 0000
08-Auto HVAC -- Status: OK 0000
09-Cent. Elect. -- Status: OK 0000
10-Park/Steer Assist -- Status: OK 0000
15-Airbags -- Status: OK 0000
16-Steering wheel -- Status: OK 0000
17-Instruments -- Status: Cannot be reached 0100
19-CAN Gateway -- Status: OK 0000
28-HVAC, Rear -- Status: OK 0000
34-Level Control -- Status: OK 0000
3B-Sensor Elect. -- Status: OK 0000
42-Door Elect, Driver -- Status: OK 0000
44-Steering Assist -- Status: OK 0000
46-Central Conv. -- Status: OK 0000
47-Sound System -- Status: OK 0000
52-Door Elect, Pass. -- Status: OK 0000
53-Parking Brake -- Status: OK 0000
5F-Information Electr. -- Status: Malfunction 0010
62-Door, Rear Left -- Status: OK 0000
72-Door, Rear Right -- Status: OK 0000
-------------------------------------------------------------------------------
Address 01: Engine (J623-CLAA)       Labels:. 059-907-401-V2.clb
   Part No SW: 4G0 907 311 E    HW: 4G0 907 401 
   Component: 3.0TDI EDC17  H37 0001  
   Revision: 53H37---    
   Coding: 32254012052F09020000
   Shop #: WSC 50290 003 104857
   ASAM Dataset: EV_ECM30TDI0114G0907311E 001001
   ROD: EV_ECM30TDI0114G0907311E.rod
   VCID: A5027538A499A2A310-80F1

No fault code found.
Readiness: 0 0 0 0 1 

-------------------------------------------------------------------------------
Address 02: Auto Trans (J217)       Labels:| 0B5-927-156.clb
   Part No SW: 4G1 927 156 Q    HW: 0B5 927 156 K
   Component: 0B5 30 TDIRdW H08 0009  
   Revision: --H08---    
   Coding: 000001
   Shop #: WSC 04940 001 00001
   ASAM Dataset: EV_TCMDL501021 001025
   ROD: EV_TCMDL501021.rod
   VCID: BB36B340321D045356-80EF

No fault code found.

-------------------------------------------------------------------------------
Address 03: ABS Brakes (J104)       Labels:. 4G0-907-379-V1.clb
   Part No SW: 4G0 907 379 H    HW: 4G0 907 379 H
   Component: ESP PREMIUM   H09 0361  
   Revision: --------    Serial number: --------------
   Coding: 27A6C705E465E3A0CB00
   Shop #: WSC 02391 785 00200
   ASAM Dataset: EV_ESPPremiAU57X 004028
   ROD: EV_ESPPremiAU57X_004_AU57.rod
   VCID: B620A274093FD93BA9-80E3

No fault code found.

-------------------------------------------------------------------------------
Address 05: Acc/Start Auth. (J393)       Labels:. 8K0-907-064-05.clb
   Part No SW: 4H0 907 064 FG    HW: 4H0 907 064 BG
   Component: BCM2 2.0      H31 0560  
   Revision: 00002001    
   Coding: 01B93006000000000000
   Shop #: WSC 53484 001 1048576
   VCID: F3A65B6052CD8C134E-80A7

   Subsystem 2 - Part No SW: 4H0 905 852 C    HW: 4H0 905 852 C
   Component: J764 ELV MLB  H40 0046 
   Serial number: 2312000068673013    

No fault code found.

-------------------------------------------------------------------------------
Address 08: Auto HVAC (J255)       Labels:| 4G0-820-043-4Z.clb
   Part No SW: 4G0 820 043 K    HW: 4G0 820 043 K
   Component: KLIMA 4 ZONEN H12 0064  
   Serial number: 17041200040582
   Coding: 3622007820
   Shop #: WSC 02391 785 00200
   ASAM Dataset: EV_AirCondiComfoUDS 002036
   ROD: EV_AirCondiComfoUDS_002.rod
   VCID: A71E7F30DE95B0B322-80F3

No fault code found.

-------------------------------------------------------------------------------
Address 09: Cent. Elect. (J519)       Labels:. 4H0-907-063-V1.clb
   Part No SW: 4H0 907 063 BP    HW: 4H0 907 063 
   Component: BCM1 2.0      H12 0111  
   Revision: 11012002    Serial number: 00000001287572
   Coding: 260020118034A7E00905008300000000CF9DC70827090101000008402100
   Shop #: WSC 50290 003 104857
   VCID: F7BE6F7046B5E03372-80A3

   Subsystem 1 - Part No SW: 4G2 955 119     HW: 4G8 955 119 A  Labels: 1KX-955-119.CLB
   Component: WWS57X 120309  H35 0080 
   Serial number:         120317110929
   Coding: 0045F7

   Subsystem 2 - Part No SW: 8K0 955 559     HW: 8K0 955 559   Labels: 8K0-955-559.CLB
   Component: RLS  H04 0003 
   Serial number: 20139503            
   Coding: 02512B

   Subsystem 3 - Part No SW: 4G0 941 531     HW: 4G0 941 531 
   Component: E1 - LDS  H07 0044 
   Serial number: 04 04 2012  00000812

   Subsystem 4 - Part No SW: 4H0 907 658     HW: 4H0 907 658 
   Component: AQ_Hum_Sensor  H03 0003 
   Serial number: E9A80326000000000001

No fault code found.

-------------------------------------------------------------------------------
Address 10: Park/Steer Assist (J446)       Labels:| 4H0-919-475-7X2.clb
   Part No SW: 4H0 919 475 Q    HW: 4H0 919 475 C
   Component: PARKHILFE ACC H07 0060  
   Revision: 11001001    Serial number: 55901208901402
   Coding: 08030C
   Shop #: WSC 02391 785 00200
   ASAM Dataset: EV_EPHVA18AU57X0000 004005
   ROD: EV_EPHVA18AU57X0000_004.rod
   VCID: C0CCC4AC5BFB678B03-8095

No fault code found.

-------------------------------------------------------------------------------
Address 15: Airbags (J234)       Labels:* 4H0-959-655.clb
   Part No SW: 4H0 959 655 C    HW: 4H0 959 655 C
   Component: Airbag10.43   H43 0040  
   Revision: --------    Serial number: 003JG0084EL%
   Coding: 30323436313330303537554A305234473053
   Shop #: WSC 02391 785 00200
   ASAM Dataset: EV_AirbaAU10BPAAU64X 001014
   ROD: EV_AirbaAU10BPAAU64X_VW51.rod
   VCID: B620A274093FD93BA9-80E3

   Crash sensor for side airbag: driver side: 
   Serial number: 3575HRB405V1BEPSCHPX

   Front Passenger's Side Airbag Crash Sensor: 
   Serial number: 3585HRB404V1BBH2C88D

   Rear Side Airbag Crash Sensor (on driver's side): 
   Serial number: 3515JRB400E4UHGCIHF3

   Passenger side rear thorax airbag crash sensor: 
   Serial number: 3525JRB401E4UHGC9P0W

   Crash sensor for front airbag: driver side: 
   Serial number: 3554VRB405D18E5G118X

   Crash sensor for front airbag: front passenger side: 
   Serial number: 3564VRB400M4UHPKL0FU

No fault code found.

-------------------------------------------------------------------------------
Address 16: Steering wheel (J527)       Labels:. 4H0-953-568.clb
   Part No SW: 4G0 953 568 A    HW: 4G0 953 568 A
   Component: Lenks.Modul   H05 0201  
   Revision: 00000000    Serial number: 20120417000975
   Coding: 000035
   Shop #: WSC 02391 785 00200
   VCID: B02C946CE35BF70BF3-80E5

   Subsystem 1 - Part No SW: 4G0 951 528 A    HW: 4G0 951 528 A
   Component: E221 - MFL  H08 0009 

No fault code found.

-------------------------------------------------------------------------------
Address 17: Instruments (J285)       Labels:| 4H0-920-xxx-17.clb-SRI1
   Part No SW: 4G9 920 980 B    HW: 4G9 920 980 B
   Component: TDieGb    Nv  H78 0416  
   Revision: 28131177    Serial number: 658190312596036
   Coding: 33A7230813212600010600
   Shop #: WSC 50290 003 104857
   ASAM Dataset: EV_RBD4K 004045
   ROD: EV_RBD4K_AU57.rod
   VCID: B2289E64E557C51B85-80E7

No fault code found.

-------------------------------------------------------------------------------
Address 19: CAN Gateway (J533)       Labels:* None
   Part No SW: 4G5 907 468 A    HW: 4G5 907 468 
   Component: J533--Gateway H10 0028  
   Revision: --------    Serial number: 00000000486550
   Coding: 00CD077D00
   Shop #: WSC 02391 785 00200
   ASAM Dataset: EV_GatewPkoUDS 001013
   ROD: EV_GatewPkoUDS_001_AU57.rod
   VCID: B3269B601A4DCC138E-80E7

   Battery Monitoring Control Module: 
   Subsystem 1 - Part No SW: 8X0 915 181     HW: 8X0 915 181 
   Component: J367-BDM  H07 0141 
   Serial number: 00000000003790922824

   Voltage stabilizer: 
   Subsystem 2 - Part No SW: 8K0 959 663 F    HW: 8K0 959 663 
   Component: J532_DCDCStab  H23 0021 
   Serial number: 09011200000000000165

No fault code found.

-------------------------------------------------------------------------------
Address 28: HVAC, Rear (E265)       Labels:* 4G0-919-158.clb
   Part No SW: 4G0 919 158 C    HW: 4G0 919 158 C
   Component: KLIMA FOND    H07 0064  
   Serial number: 19041200040530
   Coding: 02
   Shop #: WSC 02391 785 00200
   ASAM Dataset: EV_ClimaContrUnitRearUDS 002018
   ROD: EV_ClimaContrUnitRearUDS_002.rod
   VCID: AF2E9710F665E8F3EA-80FB

No fault code found.

-------------------------------------------------------------------------------
Address 34: Level Control (J197)       Labels:. 4G0-907-553.clb
   Part No SW: 4G0 907 553 F    HW: 4G0 907 553 F
   Component: LUFE-DAEMPFER H18 0782  
   Coding: 008000
   Shop #: WSC 02391 785 00200
   ASAM Dataset: EV_AirSuspe 003024
   ROD: EV_AirSuspe_VW51.rod
   VCID: AE108A14F16FE1FBE1-80FB

No fault code found.

-------------------------------------------------------------------------------
Address 3B: Sensor Elect. (J849)       Labels: 4G0-907-637.clb
   Part No SW: 4G0 907 637 K    HW: 4G0 907 637 F
   Component: SARA 6D       H01 0051  
   Revision: --------    Serial number: EJ1BPA8200198M
   Shop #: WSC 00000 000 00000
   ASAM Dataset: EV_SARA2 004010
   ROD: EV_SARA2_004.rod
   VCID: B620A274093FD93BA9-80E3

No fault code found.

-------------------------------------------------------------------------------
Address 42: Door Elect, Driver (J386)       Labels:. 4H0-959-793.clb
   Part No SW: 4G8 959 793 G    HW: 4G8 959 793 G
   Component: TSG FA        H03 0505  
   Revision: --------    Serial number: --------------
   Coding: 011F16004001620002080002
   Shop #: WSC 02391 785 00200
   VCID: C4C4C8BC47E37BAB27-8091

No fault code found.

-------------------------------------------------------------------------------
Address 44: Steering Assist (J500)       Labels:| 4G0-909-144.clb
   Part No SW: 4G0 909 144 L    HW: 4G0 909 144 G
   Component: RCEPS         H35 0010  
   Revision: 00001000    Serial number: 0027470277
   Coding: 101000010000
   Shop #: WSC 02391 785 00200
   ASAM Dataset: EV_RCEPS 009008
   ROD: EV_RCEPS_009.rod
   VCID: B2289E64E557C51B85-80E7

No fault code found.

-------------------------------------------------------------------------------
Address 46: Central Conv. (J393)       Labels:. 4H0-907-064-46.clb
   Part No SW: 4H0 907 064 FG    HW: 4H0 907 064 BG
   Component: BCM2 2.0      H31 0560  
   Revision: 00002001    Serial number: 0174000735    
   Coding: 013F062220B9040083200904000104000000000000000000000000000000
   Shop #: WSC 50290 003 104857
   VCID: F3A65B6052CD8C134E-80A7

   Subsystem 1 - Part No: 4G0 951 177 
   Component: DWA-Sensor  H01 0010 

   Subsystem 2 - Part No: 1K0 951 605 C
   Component: LIN BACKUP HO  H05 1501 

No fault code found.

-------------------------------------------------------------------------------
Address 47: Sound System (J525)       Labels: None
   Part No SW: 4G0 035 223 C    HW: 4G0 035 223 A
   Component: BOSE-G3-C7    H07 0160  
   Revision: CJ007001    Serial number: 00000000043861
   Coding: 030000
   Shop #: WSC 02391 785 00200
   VCID: 9D725DD884C96A6348-80C9

No fault code found.

-------------------------------------------------------------------------------
Address 52: Door Elect, Pass. (J387)       Labels:. 4H0-959-792.clb
   Part No SW: 4G8 959 792 G    HW: 4G8 959 792 G
   Component: TSG BF        H03 0505  
   Revision: --------    Serial number: --------------
   Coding: 011F16004001620002080002
   Shop #: WSC 50290 003 1048576
   VCID: C3C6CBA042ED7C931E-8097

No fault code found.

-------------------------------------------------------------------------------
Address 53: Parking Brake (----)       Labels: 4H0-907-801.clb
   Part No SW: 4H0 907 801 E    HW: 4H0 907 801 A
   Component: EPB-4         H03 0012  
   Revision: --------    Serial number: 00000000319415
   ASAM Dataset: EV_ParkiBrake 001022
   ROD: EV_ParkiBrake_VW51.rod
   VCID: AA188604CD878DDB3D-80FF

No fault code found.

-------------------------------------------------------------------------------
Address 5F: Information Electr. (J794)       Labels: None
   Part No SW: 4G0 035 193 E    HW: 4G0 035 193 D
   Component: RMC Cnct Nav  H52 0775  
   Coding: 0101050001E15B67082B060301020100000000
   Shop #: WSC 02391 785 00200
   VCID: A5027538AC99A2A310-80F1

   Subsystem 1 - Part No: 8X0 919 884 D
   Component: P13-50-11.06  0002 

   Subsystem 2 - Part No SW: 4G0 919 603     HW: 4G0 919 603 
   Component: DU6 Basic  H42 0084 
   Serial number: 9464CT0C2521366     

   Subsystem 3 - Part No SW: 4G2 919 610 B    HW: 4G2 919 610 B
   Component: E380 BDT C7  H11 0204 
   Serial number: 90349LDC0017V       

1 Fault Found:
03157 - Functionality limited due to Communications Disruption 
            000 - -
             Freeze Frame:
                    Fault Status: 01100000
                    Fault Priority: 6
                    Fault Frequency: 1
                    Reset counter: 190
                    Mileage: 178037 km
                    Time Indication: 0
                    Date: 2021.06.03
                    Time: 15:10:42

             Freeze Frame:
                    Bin. Bits: 00100000 00000000
                    Bin. Bits: 00000000 00000000
                    Bin. Bits: 00000000 00000000
                    Bin. Bits: 00000000 00000000


-------------------------------------------------------------------------------
Address 62: Door, Rear Left (J388)       Labels:. 4H0-959-795.clb
   Part No SW: 4G8 959 795 G    HW: 4G8 959 795 G
   Component: TSG HL        H03 0505  
   Revision: --------    Serial number: --------------
   Coding: 010F14004001620002080002
   Shop #: WSC 02391 785 00200
   VCID: C6C0D2B471DF49BB39-8093

No fault code found.

-------------------------------------------------------------------------------
Address 72: Door, Rear Right (J389)       Labels:. 4H0-959-795.clb
   Part No SW: 4G8 959 795 G    HW: 4G8 959 795 G
   Component: TSG HR        H03 0505  
   Revision: --------    Serial number: --------------
   Coding: 010F14004001620002080002
   Shop #: WSC 02391 785 00200
   VCID: C6C0D2B471DF49BB39-8093

No fault code found.

End----(Elapsed Time: 02:24, VBatt start/end: 11.7V/11.7V. VIgn 11.7V)-----
 
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   #2  

nugentp

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Address 5F: Information Electr. (J794) Labels: NONE
Part No SW: 4G0 035 193 E HW: 4G0 035 193 D
Component: RMC Cnct Nav H52 0775
Coding: 0101050001E15B67082B060301020100000000

Looks like there is not much info on this flavour of RMC in VCDS - no labels or coding helper. If anyone has it in German I would be happy to translate that and share back.
In saying all that - the coding for this has not been changed in years... is this a low level comms problem that needs a hardware reset like pulling fuses or battery disconnected ?
 
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stefdds

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Optical Bus Diagnostic : Standard

Controller Electrical Optical
CAN Gateway OK OK
Information Electr. OK OK
Instruments ERROR ERROR
Sound System OK OK
One of my favorite RT videos!



 
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stefdds

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When clearing the fault on 5F it returns in matter of seconds with same presentation.
I've had some experience with those "symptoms" ie the "hard fault" : check fuses, wires , perhaps a plug (unplugged). Many times with faults that come right back immediately, it is something rather obvious.
The vid above may give you additional insight.
 
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nugentp

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Thanks for the vid link - it confirms what I understood about the MOST bus from other Audi SSP docs - the presence of the electrical error at the instruments is perhaps a good clue to the root cause.

I purchased an optical link test loop for small money to see if that points to anything in particular - I should be able to verify all the optical cables in the car are good. I only ever unplugged that at the CAN gateway and I know to treat those cables very carefully. Neither the radio or the cluster have been removed so it would be very tedious if there is a damaged/loose connection behind there.

I will do a fuse check and try diss'ing the battery a few minutes to see if a hard reset kicks things back to life. I could understand the errors better if there was some loss of functionality between 5F and 17 but it all seems to work perfectly - just VCDS picking up this low level comms fault.

Also - I do still have older versions of VCDS installed so I can back pedal to the version where everything was error free - open to all suggestions here. I have found a bunch of 3157 related threads across various Audi owner forums but none which come to a nice clean conclusion although a common cause does seem to be coding errors / config mismatches which cause this issue so I have to revisit all the coding values.
 
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nugentp

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EDITED to include pics.

So I looked at schematics and found which fuses to pull for instruments and media/nav unit. Did those in the hope of a hardware reset maybe resolving the issue but sadly not.

SC_FUSES_RHD.jpg

Then I turned attention to the green/violet diagnostic wire that links the CAN gateway to instruments, Bose and media/nav units on this car (it's also used on cars with DVD or TV tuners). The schematics reference a junction point in the loom where those wires are combined. Of course it's a total mystery where the actual junction is on the loom.

Ever the optimist I lifted the rear seat and carefully unpicked the fabric insulating tape at the CAN gateway and peeled as far back as I could without lifting out rear carpet and all the tedium that involves. Sadly that area of the loom did not find the cable joint... it's a single cable all the way into the big heavy loom at the edge of rear seat which would require a long day of pulling out much of the cabin to trace further.

(edited)_CAN_Gateway_Loom.jpg


Next point of interest is the schematic shows a connection point at the driver side A pillar (LHD or RHD) for the green/violet diag wire between the gateway and cluster so that's the next candidate for possible badness.

I left enough of the diag wire at the gateway in such a way I can do an easy connectivity check when I get behind that A pillar trim.

CAN_Gateway.jpg
 
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nugentp

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   #9  

nugentp

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Hans & Franz messed up again - the ELSA wiring info clearly calls out T17g for that via as being on drivers side following the sense of LHD or RHD but after taking all the right side trim apart to locate the A-pillar plugs on driver side, I can confirm that there is indeed 4 x 17 pin plugs of the correct colour in the correct locations shown but there is absolutely not the green/violet wire in any of them.

I can only hope one of the plugs on the left A-pillar (which would be T17g for LHD as per drawings) is actually T17o for us 2nd class RHD citizens - I find this issue all too often with Audi schematics over the years. I had some hope with the C7 diagrams as they do appear to address the RHD market much better then older generation diagrams, but there is a clear mistake here on the diagnostic wiring. I wouldn't mind so much but it takes so long to carefully remove all the side trim from B-pillar to make sure you don't break any clips before you get to the A-pillar.
 
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stefdds

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I purchased an optical link test loop for small money to see if that points to anything in particular - I should be able to verify all the optical cables in the car are good.
I think I would start with the test loop, as you may have a non-functioning "box" and not a broken wire problem.
 
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nugentp

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Its the electrical error for the instruments that I want to bottom out first. I could understand a non-functioning box if there was any loss of functionality or other / general errors but its just this diagnostic error which is getting picked up.

For my own sanity I will need to look at the left side A-pillar for that green/purple wire - if its not there I will have to go ahead and pull the cluster and radio/info unit to verify the optical loops and electrical connection back to the CAN gateway.

Any normal person would just ignore the error but its annoying me as clearly something is out of whack.
 
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stefdds

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I completely understand and I do understand your process (very thorough !) , but at this point in your investigation it seems like a lot of effort. Who knows what is triggering that fault and you could have a false positive on your hands ; meaning that something else could be triggering that message and perhaps "looping" one of those boxes may make your concern disappear (?). Don't take those messages so literally (counter intuitive I know) (keep a open mind, some creativity may apply here ) as it may only be a symptom and not the actual problem / component. You may discover just doing some quick / simple diagnostics (loop, unplugging, then re-scanning etc.) may lead you in another direction. BTW, I have had a fuse show ok only to find a loose connection to it ; meaning "wiggle" connections around a bit and be sure there is continuity.

I look forward to read here what you ultimately discover!
 
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nugentp

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Yeah so the joy continues... off with all the left side trim and the now infamous green / purple diag wire is nowhere to be seen their either. I took couple pics for posterity and buttoned it up again. Next joy will be removal of the radio / info unit and cluster - I was hoping to avoid that but at least when they are exposed I can do continuity checks on that diagram wire and the optical links. Only when I have ruled out connectivity can I really start pointing fingers at the cluster or radio units themselves. Deep breath lol !
 
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nugentp

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There's the pic of left A-pillar RHD.

C7-RHD-Left-A-pillar.jpg
 
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nugentp

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So the colour and position of those 17-pin plugs does align with schematics. The red herring was mention of T17g/3 in one diagram and T17g/14 in another for the OBD diagrams wire. That turns out not the case for MY2013 RHD car with RMC.
 
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   #16  

nugentp

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For completeness sake - also a pic of right side A-pillar.

C7-RHD-Right-A-pillar.jpg
 
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For a laugh, I tried running output tests on the RMC unit (5F)... It goes along this basis:

1. Signal: Telephone On - this had no apparent output that I could detect - audible or visible (my phone was paired)
2. Lighting - the illumination on the buttons was activated
3. Self Test - showed HexValue 0x0001 and Bin Bits 000000
4. END

Anybody got a clue what normal looks like ?

Its annoying this unit 4G0035193E is seemingly not well documented on VCDS or anywhere else for that matter.
I will happily translate any info that exists in German.

Tomorrow I hope to pull the RMC unit and the cluster for further tests
 
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nugentp

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I have captured ADMAP and BLOCKMAP files if they are any use... dont have anywhere to share them here of course... not that anyone cares either lol - seems i am the only person in the world who has scanned that RMC device with VCDS.
 
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   #20  

nugentp

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actually i stuck them on a google drive :

ADMAP : admap
BLOCKMAP : blockmap

I might do a factory reset on the radio/info unit - bit of a pain bonding phones etc but it might force things into a different state.

I cannot help wonder if some coding change on the BCM or the cluster for the xenon light retrofit caused this, but it was all clean of errors when I did that 2yrs ago and I checked all the coding change history that I saved already once. But its also no coincidence that the fault was introduced after I had the dealership remove CP on the 2nd hand gateway which I fitted to enable the extended CAN bus for connectivity with the LWR/AHLS/J431 module. Wonder if their system recoded or made some adaptation channel changes somewhere along the way.

I had always assumed the cause of the error was some low level s/w difference or mismatch in protocols with the replacement gateway which did not come from same model year. All functionality was in tact however. It became really perplexing when I swapped back to original gateway expecting the comms error on the radio (5F) to disappear but it didn't.

I already checked that no modules have been software upgraded/reflashed by the dealer - unless they hide that very well - I only see one programming count reported.

Anyway - too much talk - what I really need to get on with next is verify that I do have electrical connection from $5F to $19 - I need to pull the radio for that.
 
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