Help please with COMAND retrofit problems

[colh]

Just been attempting a retro-fit of a s/hand COMAND 2.0 to my '02 W209 CLK, with partial success: system powers-up, loads nav cd, get gps fix (4 satellites), FM radio tunes fine.
My problems are seemingly with the D2B, namely that the CD changer (or Dension iPod interface, depending on changeover switch) is not found. CD changer is getting power.

From all the retro-fit pages I've read on the web, it seems that no re-configuring should be needed, though on some pages its not 100% clear. Bear in mind I have no idea of the audio/telematics configuration of the vehicle the unit came out of (language came up English, country came up Germany - but maybe those are just the cold-start defaults).

I've gone into the diags menus, and here's some (hopefully) pertinient info:

DIAG Errors:
SAE Code N1112, Type 0x0000, Cnt 011, State A
[an 'active' d2b error it seems - not surprisingly!]

D2B Wakeup test:
Runs ok, but no items have ticks against them on completion.

D2B Components:
Pos Actual Config
000 1C8 1C8 [COMAND]
0FF 000 0F0 [Phone]
0FF 000 190 [CD changer]
0FF 000 000
0FF 000 000
0FF 000 000

Configuration [Y=ticked, N=no tick]:
N TV-Tuner
Y Telephone full exp
Y Telematic
Y Telematic via D2B
N analogous Sound

From my dismantling of the rear last weekend (!) it looks like I have Option 854 (MB portable phone) - the Nokia DME-1E interface (A203 820 99 26). However I don't have a phone to use with it.


Does anyone have any thoughts about and 'obvious' step I'm missing - is it possible that some STAR re-configuration might be needed?
Is there a minimum operational radius on bends in the fibre-optic 'cables'? (One of them was pretty tight - about 1" radius, though not kinked)
Would a wiring fault on the D2B Wakeup line cause these symptoms?


Other common errors?

And there was me expecting to have problems with the CAN or gps antenna.....
Have put the Audio10 back in for the moment, and all is working correctly as it was.

Thanks for reading this far!
Col

 

[richard]

COMAND isnt seeing anything on the D2B bus (as shown by the 'actual' column) - it doesnt matter that its not configured correctly though -

This is one of 2 things (a) broken fibre loop (and 1" is quite tight) - or (b) wakeup signal isnt connected - as you're doing a retrofit and it works when you put the Audio10 back i'd guess at (b)

Where did you connect the wakeup signal to (from the C connector on the car (which also has the CD power and CAN bus)) ?

If you found the phone controller, then in the central armrest should be the phone brakcte, unless someone removed it - then you may be able to see a "ethernet like" connector in there at the bottom for it, or it may be under the bottom on the W209 (can't remember)

Cheers

Richard

 

[Nibbo]

Did you get a loom adaptor?
The CD connector that plugs into the back of the stereo is called a 'C' connector (I think) and this needs an adaptor to split it in to a 'C1' and a 'C2' connector which then plug into the back of the command unit.
If you dont have one PM alfie who can supply them.

Hope you get it all working.

 

[colh]

COMAND isnt seeing anything on the D2B bus (as shown by the 'actual' column) - it doesnt matter that its not configured correctly though -

This is one of 2 things (a) broken fibre loop (and 1" is quite tight) - or (b) wakeup signal isnt connected - as you're doing a retrofit and it works when you put the Audio10 back i'd guess at (b)

Where did you connect the wakeup signal to (from the C connector on the car (which also has the CD power and CAN bus)) ?

If you found the phone controller, then in the central armrest should be the phone brakcte, unless someone removed it - then you may be able to see a "ethernet like" connector in there at the bottom for it, or it may be under the bottom on the W209 (can't remember)

Cheers

Richard

I made up an adaptor to convert 5 signals from C to C1/C2 - the wakeup is off that (C/4). The phone 'handset' was mounted on the dashboard - RJ45 connector behind the centre console. This part of it I've removed.
Will re-check and 'buzz out' my adaptor.
One thing that did surprise me was that the C connector on my loom was pretty much fully populated - I was expecting just the five signals I'd seen described elsewhere (2xCAN, W'up, 2xChanger).
Was also trying to remember if I noticed whether the instr cluster was showing anything with the radio on (i.e. CAN connection working), but don't recall accurately - I didn't pay much attention to that aspect.

 

[colh]

Oh, and as I recall: I know the CD changer has power since I can eject the magazine; but on switching the system on, I don't hear it shuffling through the trays looking for CD's.

 

[Alfie]

When you press the Cd button do you get a choice of CD Changer and Cd0 or just 'no CD changer' displayed? If its the latter and you are sure there is power to the changer then your wakeup signal is not getting through.

You dont need any STAR coding to get it working with a CD changer but you will need coding if you want the cluster to show navigation information.

 

[colh]

When you press the Cd button do you get a choice of CD Changer and Cd0 or just 'no CD changer' displayed? If its the latter and you are sure there is power to the changer then your wakeup signal is not getting through.

You dont need any STAR coding to get it working with a CD changer but you will need coding if you want the cluster to show navigation information.

Just 'No CD changer'

 

[richard]

definetly check your wiring of the wakeup line then

R

 

[colh]

Anyone know how long the wakeup pulse is???

 

[Rumble]

I had this problem with my cd changer connected to my radio...try cleaning the optical connectors and making sure the sockets are free from dust or debris if that doesnt work remove the fuse in the back of the comand unit for a few minutes (make sure key is not in the ignition) then plug everything in and pop the fuse back in and then start the car up and see if anything happens.

 

[colh]

Anyone know how long the wakeup pulse is???

Ah, this seems to tell me: http://www.mercedestechstore.com/pdfs/416_Telematics/416%20IL%20Mod%201.1%20D2B%20Wake-up%20Scope%20test%2003-04-04.pdf

 

[colh]

Just had a moment of revelation, I really really hope! See http://www.mbclub.co.uk/forums/showthread.php?p=317012&posted=1#post317012

....fingers crossed......

 

[colh]

Dammit! That didn't help.The two loom adapters seem to connect the three plugs together in a different order but its working no better than before. Have tried without the Dension too.
I've also noticed that when I switch the ignition on the instr cluster just shows "Audio ----". Seems odd, if the thing is faulty, that two separate bus systems would go wrong...
Have checked my wiring again and again, but I can see nothing wrong (compared with the info on mercupgrades). Five connections: cd changer power (which is ok), 2x CAN, D2B wakeup.

Really stuck for ideas now; though I may try to look for a wakeup pulse with a 'scope.
Should it be possible to detect d2b bus activity with the naked eye, during boot-up, or wakeup test diags or anything?
Any other ideas anyone? Pleeeease!

 

[richard]

Did you make the connector up yourself. What order did you wire the C plug in ? The number order on those ISO connectors is not what you would expect.

(Its
1 3 5 7 9
2 4 6 8 10

See http://www.whnet.com/4x4/MY2000_MCS_pins.html
)

Cluster showing 'Audio ----' means canbus isnt working

Also, check the C2 connector, the numbering is on the connector, very small (well at least the end pins are numbered)

Now, I know my retrofit comand document (on mercupgrades) says wakeup is on C pin 4, i've just looked at the whnet website above, and it suggests it may be on C pin 7 on the ML at least - I worry that I wrote the pin numbers wrongly when I wrote the document (although no one has complained in 3 years!!)
- Alfie, can you comment ?

Richard

 

[Alfie]

Did you make the connector up yourself. What order did you wire the C plug in ? The number order on those ISO connectors is not what you would expect.

(Its
1 3 5 7 9
2 4 6 8 10

See http://www.whnet.com/4x4/MY2000_MCS_pins.html
)

Cluster showing 'Audio ----' means canbus isnt working

Also, check the C2 connector, the numbering is on the connector, very small (well at least the end pins are numbered)

Now, I know my retrofit comand document (on mercupgrades) says wakeup is on C pin 4, i've just looked at the whnet website above, and it suggests it may be on C pin 7 on the ML at least - I worry that I wrote the pin numbers wrongly when I wrote the document (although no one has complained in 3 years!!)
- Alfie, can you comment ?

Richard

I have an ML comand in my W208 at present (on test) and it controls my CD changer quite happily so I'm pretty sure the wiring for the ML wakeup is the same for both CLK W208 and ML.

I've always made adapters for all sorts of COMAND installs according to whats in your www.mercupgrades.com web page Richard. Fear not, it is correct.

The problem colh is having is almost certainly related to incorrect wiring of the canbus wires. The D2B can be seen working by connecting up the fibre to the comand and running a D2B wakeup test.

 

[colh]

HOORAYYYY! At last!
Hooked the thing up on the bench and started checking the CAN and Wakeup signals, with and without the C/C1/C2 adapter. At first I had nothing on Wakeup,went direct to COMAND connector - ok. Back to end of adapter - still ok. Checked CAN_H/_L - both ok. Right, try it back in the car, I suppose. => All works - CD changer wakes up, instr cluster display ok, Nav still ok too.

BUT: still not completely there. I did have the Dension (iPod) i/f working, then tried to switch over to CD changer. Did something (don't know what, of course!) and got that going, but now I can't get back to iPod.
The Dension manual talks about the D2B needing to be shut down for an amount of time - variable depending on car. Anyone know how long this might be, and/or what else might be necessary? I've tried doing a Diag System Reset on the COMAND but that doesn't seem to be enough.

Finally (for now!), when I look at the D2B Components in the Diags, the 'Config' and 'Actual' entries do not match. Is this likely to cause a problem??

 

[colh]

OK, think I got it now. Switched back to the 'correct' Dension-supplied D2B adaptor, and now can select either iPod or CD Changer - switch off COMAND, flip the c/over switch, COMAND back on and Sys Reset. Maybe the reset isn't necessary but I'll worry about optimsiations later!
Now I'm off to cram it all into the console and put everything back together. The COMAND went fully into position really easily when I did it earlier this pm, so.......

 

[Alfie]

Well done.

 

[colh]

Sorted!!!
Thanks to everyone who contributed ideas/suggestions - it encouraged me to persevere, apart from anything else - and especially to Alfie : he does this stuff for a living (*** www.comand.co.uk ***) but was still willing to help out a DIY-er -good on ya.
Now I just have to learn how to 'drive' the thing.....

Cheers,
Col

PS - how do you delete past error codes in the diags menu...??

 

[Alfie]

Sorted!!!
Thanks to everyone who contributed ideas/suggestions - it encouraged me to persevere, apart from anything else - and especially to Alfie : he does this stuff for a living (*** www.comand.co.uk ***) but was still willing to help out a DIY-er -good on ya.
Now I just have to learn how to 'drive' the thing.....

Cheers,
Col

PS - how do you delete past error codes in the diags menu...??

You can download a manual from the internet. http://home.online.no/~alla-ra/artimages/2001_CLK&E_COMAND.pdf

To clear the errors, press mute & 0 whilst in the diag menu.

Glad you got it sorted. I try to help as much as I can even though there are many occasions when no sale or profit is made. I just enjoy it and hopefully thse who are helped come back some time or tell their friends. It really helps that the comand business isnt my main employment. I can devote time to something I enjoy and hopefully help others at the same time.