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RDS-TMC connection: RDS-TMC connection is faulty
Posted: Sun Aug 17, 2014 12:28 pm
by MalcolmSu
all has been well for months then this popped up - "RDS-TMC connection: RDS-TMC connection is faulty". Searched on here for the solution. Two suggestions. Tried disconnecting the power for 5 mins. No joy. Then bought replacement TMC unit off ebay. Arrived yesterday so fitted it. Error message is still there. Tried power cycle again. No joy. Other than "you've bought a faulty unit of ebay" any other suggestions?
Re: RDS-TMC connection: RDS-TMC connection is faulty
Posted: Sun Aug 17, 2014 8:42 pm
by Shoppinit
Odd. You can put the RNS-D in diagnostics mode to see if it's talking to the TMC module, but I don't think it'll tell you anything you don't already know - ie it's not talking to it.
I would suspect a faulty replacement unit. Could be the CAN wiring between the unit and the RNS-D but I just can't see it somehow.
Re: RDS-TMC connection: RDS-TMC connection is faulty
Posted: Mon Aug 18, 2014 11:24 am
by Shoppinit
Did you get the exact same part number?
Re: RDS-TMC connection: RDS-TMC connection is faulty
Posted: Mon Aug 18, 2014 5:32 pm
by MalcolmSu
I did - 4B2919894. I've just bought another one from eBay (UK based this time) so will post result of that in a few days...
I found a link where someone attempted a repair by replacing three of the capacitors so I may try that with my two duffers if this one works
Re: RDS-TMC connection: RDS-TMC connection is faulty
Posted: Mon Aug 18, 2014 5:36 pm
by Shoppinit
I had a look at the circuit board in my deceased TMC module. Didn't see anything that look like it might respond to a prod with a soldering iron. Be interested to see your link though.
Re: RDS-TMC connection: RDS-TMC connection is faulty
Posted: Mon Aug 18, 2014 5:56 pm
by MalcolmSu
http://knissine.wikidot.com/rds-tmc-tuner-fix
different part number but internals look exactly like mine.
I also noticed that the bottom CB is soldered to the case which would suggest there some connection (earth?) but refastening my unit back into the bracket made no difference. Some of the links I looked at talk about a fuse specifically for the TMC unit but I've not been able to track one down. Is there?
The first unit came from Latvia - today's eBay purchase comes from a breaker just 3 miles from me - only I'm 40 miles away at work when he's open so it's "in the post". Fingers crossed...
Re: RDS-TMC connection: RDS-TMC connection is faulty
Posted: Mon Aug 18, 2014 6:09 pm
by Shoppinit
Definitely no fuse. Sorry.
Re: RDS-TMC connection: RDS-TMC connection is faulty
Posted: Tue Aug 19, 2014 6:25 pm
by MalcolmSu
Bugger! 2nd RDS-TMC unit arrived in the post tonight (our postal service gets later and later!). Quickly plugged it in - same error..
Will pull the radio at the weekend and trace some wiring...
Re: RDS-TMC connection: RDS-TMC connection is faulty
Posted: Tue Aug 19, 2014 6:29 pm
by Shoppinit
Arse.
Re: RDS-TMC connection: RDS-TMC connection is faulty
Posted: Tue Aug 19, 2014 6:30 pm
by Shoppinit
Is your menu button working?
Re: RDS-TMC connection: RDS-TMC connection is faulty
Posted: Wed Aug 20, 2014 9:00 am
by MalcolmSu
Yes
Re: RDS-TMC connection: RDS-TMC connection is faulty
Posted: Wed Aug 20, 2014 9:14 am
by Shoppinit
Can you communicate with the RNS-D with the
Vagcom?
Presumably you've got no display on the dash for music or nav or anything?
Re: RDS-TMC connection: RDS-TMC connection is faulty
Posted: Wed Aug 20, 2014 9:44 am
by MalcolmSu
I haven't tried
Vagcom yet but will give that a try tonight. There's no info on the dash and I've tried cycling the display off and on via the Menu button with no success. The 'hidden' menu on the rns-d shows no Canbus connection (surprise).
Re: RDS-TMC connection: RDS-TMC connection is faulty
Posted: Wed Aug 20, 2014 10:06 am
by Shoppinit
The TMC module gets the car CANbus network from the dashpod. Could be a wiring fault. Have you scanned the car for faults? Any other odd CAN related faults coming up?
Re: RDS-TMC connection: RDS-TMC connection is faulty
Posted: Wed Aug 20, 2014 8:32 pm
by MalcolmSu
A quick scan with VCDS-lite tonight threw up the following codes - not sure which are relevant or which to focus on...
-------------------------------------------------------------------------------
Address 17: Instruments Labels: 4B0-920-xxx-17.LBL
Controller: 4B0 920 983 B
Component: KOMBI+WEGFAHRS. VDO D15
Coding: 01484
2 Faults Found:
01300 - Control Module for Navigation with CD-Rom (J401)
49-00 - No Communications
01304 - Radio
49-00 - No Communications
-------------------------------------------------------------------------------
Address 37: Navigation Labels: Redir Fail!
Controller: 4B0 035 192 K
Component: RNS 4.2 H06 BNO 0140
1 Fault Found:
01317 - Control Module in Instrument Cluster (J285)
49-00 - No Communications
-------------------------------------------------------------------------------
Address 56: Radio Labels: Redir Fail!
Controller: 4B0 035 192 K
Component: Radio BNO 0001
Coding: 00017
2 Faults Found:
00856 - Radio Antenna
36-10 - Open Circuit - Intermittent
01317 - Control Module in Instrument Cluster (J285)
49-00 - No Communications
-------------------------------------------------------------------------------
Address 57: TV Tuner Labels: None
Controller: 4D0 919 146 B
Component: TV Tuner H10 1206
Coding: 0000010
1 Fault Found:
00861 - Connection to Navigation Computer
011 - Open Circuit - Intermittent
-------------------------------------------------------------------------------