W220 - No audio and "CD Changer not found"
 

Hey guys,

I am hoping someone has seen this before. My 2000 S430 Comand system produces no audio and displays "no cd changer". I am pretty good at troubleshooting most mechanical things but with the D2B system on this car I have no idea where to begin. I did test the amp for 12 volt across the fuse and the COMAND sytem fuctions as normal - just without sound. Does anyone have any ideas on where I might start looking?

Thanks!

Brian

Brian- i bought a new casette for the changer on ebay for 10 bucks. My changer is now recognized and everything works like it should.--JEFF

Does the car have a phone or Voice control?
Do you have any Tele-aid faults showing?
Find the fuse chart in with the tools and pull out these
fuses. 18, 61, 63, 64, and 66.
Let the car sit for 20 min and put fuses back.
Hopefully the ring will reset and comeback.
If not, there is a hard fault with a D2B component.
We have a special tool at the dealer called the Berger Tester
that can be substituted for a suspect item.
It is basicly a D2B repeater.
Good Luck.
DR.D

Thanks for the replies. It does have a phone and teleaid however no faults are showing. I pulled the comand unit and checked for the 4 light lock pulse. looked good and strong. Next I checked the 4 light pulse at the end of the fiber before the first D2B component. looked good. Then checked the light pulse after the first component. ok again. the next D2B component was the amp. I heard it click four times but no light exiting the amp fiber. I strongly suspect the amp is dead. I have reset the D2B ring through the head unit diagnostic menu. I ordered a nw amp from ebay. Ill let you guys know how it turns out.

Thanks

Be carefull. The Phone PSE and VAD voice control units are very common for locking up. Does the Bose amp have light output at the D2B connection
on the amp itself?
DR.D

Dr.D,

No light output from the amp. I can see the four flash ring lock at the optic line going into the amp, I can hear the amp click four times, but then their is no light output from the amp.

Can you tell me where the voice control module is located? I am guessing it is somewhere near the phone?

Thanks for all your help!

Brian

There's some D2B ring diagnostics built into COMMAND in a "secret" menu by holding "Mute" + "1" + "2" for several seconds (or it may be "Mute" + "1" + "3").

To add to Bryan's post:

Hit 'SVC' > 'Aux' > Hold Mute, 1, 3 together for 5 seconds or so.

This is for a COMAND 2.0 system. Within that menu is a diagnostics where you can reset the system.

Good Luck

Brian,
Sounds like the FOT in the Bose amp is dead. (Fiber Optic Transciever).
I hope your EBAY amp works for you.:beerchug:
The VAD unit is the small black plastic box with D2B fibers mounted sideways
next to the AMP and CD changer. It is the size of a CD canger magazine.
Regards,
DR.D

Dr. D,

Thanks for the reply. I have my fingers crossed that the amp will do the trick. If not, I may have to take it in. I will keep you guys posted as to the fix. I ran the D2B diagnostics last night. Cleared the old codes from the COMAND and the only new code it set was, of course, D2b master cannot communicate with the predecessor device. Everything points to the amp...

Thanks again,
Brian

While we're on this topic I might as well ask the question: if I add a CD changer (just bought one off Ebay) to my COMAND 2.0 loop that was not configured with one at the factory do I need to program it into the system with SDS or will it be recognized by the master (COMAND unit) upon plugin? The system does not have a telephone.

Thanks :D

It will work when the key is cycled and the head unit is restarted.
It should be coded with the factory SDS machine, otherwise there could
be intermittant audio issues with the system and a current fault code.
It should....should work anyways.
DR.D

Dr. D,

Havent installed the new amp yet but I did notice something else that is weird. When I run the D2B wakeup on the COMAND it will not wake any of the components on the ring up. The repair manual I was using said to be sure the optical ring was open before performing the test - so I left it open.

Do you think this is consistent with the amp being dead?

Thanks for all your help!

You could take the amp out of the loop by connecting the TX and RX fibers together and re-run the diagnostics.

BryanM,

I will try that. Can you pry open the d2b connector fairly easily or is there a better way to do it rather than taking it apart?

Thanks

It's pretty easy.

Check out these two articles for info & steps:
http://phdwebsite.powerpulse.cc/V60i%20Documents/01%20D2B%20Config%20Bulletin.pdf

http://phdwebsite.powerpulse.cc/Miscellaneous%20Info/D2B%20Training%20Info.pdf

Since you probably don't have an in-line coupler kicking around, you could align the two fibers ends and hold them in place with tape.

awesome...I will give it a shot at lunch.

Thanks!

Well, this thing has me baffled. I bypassed the amp by connecting the fibers but still nothing. To summarize:

4 light pulse coming from COMAND going into amp
no light output from amp but I hear the amp click 4 times during startup
COMAND diagnostic fails to wake up any of the comonents on the ring

couple of questions:
should all the devices emit light from the device connector at startup?
Is there one item in common that would cause the wakeup line not to operate?

This has got me stumped..

Unless I am mistaken, you should only see flashes from a device (i.e. on the "out" fiber) in response to flashes from the head unit or previous device (i.e. on the "in" fiber).

To see if the AMP is trying to "talk", you could:
a) insert only the red fiber (without the connector) into the socket and observe the hole where the "out" fiber would go for flashes during wake-up, or
b) re-connect the AMP and disconnect the connector from the next device in the ring, which on your car should be the CD changer and observe this for flashes.

When you perform a wake up demand, that comands the D2B master (head unit or Comand) to initiate the wake up and roll call. The roll call is the 4 flashes.
That reports to the next unit in the ring that the predecessor recieved the wake up command and is ready. Every control unit with a D2B connection
should have a single flashing red output during the wake up or roll call.
If your unit does not flash, there is a mechanical fault or a wiring issue like
the wake up line (turn on wire) is faulty.
The wake up line will have 12v at all times. When the wake up command is
issued by the head unit, that 12v is pulled down to less than 1 volt for 100ms.
A scope or really fast DVOM will be handy.
The wake up test via the head unit is for testing this electical line, not the fiber optics. That is why the lights may not flash.
Try the Diagnostic routine of Mute+1+3 for 5 seconds+.
scroll down past "versions, Tuner," and enter "diagnostics"
Go into D2B components. A list of actual vs. specified components will
come up.
The correct no fault display would be as follows.
Pos Actual Specified
000 1C8 1C8 (COMAND)
001 108 108 (AMP/BOSE)
003 0F0 190 (CHANGER)
002 190 0F0 (TELEPHONE)
004 1F8 IF8 (VOICE CONTROL)
005 0E0 0E0 (TELE-AID)

And yes, It is normal for the CD and it's successor to be reversed.
They show up that way in this screen.;)

If you have a actual of blank, but a specified there. that unit is
off line or faulty.

If you want to test the FOT light output of the units, just power the head
unit up. All units should flash 4 times every time you cycle the HU on and off.
Like I said, the wake-up test is for electical scope testing of the wake up circut.

Hope this helps.
Regards,
DR.D

Dr. D

You are the man! I got it working. He is what happened:

I run the wake up and none of the components show up. I open the drivers footwell and check for 12 volts at the wake up line - ok.

Then, I go to the back power up the head and check for the line to go low - ok again.

Then, i short the optical circuit to only one connector and start chaecking one device at a time. What I find is that whola! the amp works alone, the changer works alone, and the phone alone. No way to test the VR. However, I also notice that when I plug the electrical in for the VR none of the other devices will wake.

So, I short only the VR out of the loop and do not plug i the electrical. Everything now works - except for the VR.

As it turns out it was the VR all along that was causing all the other units to not wake.

Thanks for all your help guys! Guess I am off to the dealer for a new VR.

Do you use it?? It is not cheap.
DR.D

Dr. D,

I have not used it yet. I will call the dealer now for a price....if it is not "reasonable" I may have to wait until a used one comes up on Ebay. I took the VR totally out of the optic loop so everything else works fine. I'll post the cost when I get it.

Brian

The VR is likely repairable.

Check out http://www.programainc.com/

Good web site...I will give them a call.

The module at the dealer is $360 wholesale. As Dr. D said , it may not be worth fixing.

The thing is, I have the ANCIENT Micro Tac phone installed in the car. With the introducion of the E911 thing this phone cannot be activated. I want to upgrade to a newer system that will use bluetooth but the dealer seems to think it is a lost cause. He suggested leaving the ring just like I have it (bypassing the VR) and dont try to integrate a different car phone.

Anyone tried to install BT in a system this old?

Brian

All fixed....the dealer gave me a used VR that pulled from a trade in. They pull them rather than explain why the phone system does not work. Everything looks great now.

Thank you guys for all your help!

Upgrade!
 

You can sure upgrade your phone to the latest system and use BT.
It won't be cheap though.

Installation Instructions
Date: October 2005
Order No.: P-I-82.70/471
Supersedes: P-I-82.64/189
Group: 82

SUBJECT:
MODEL 220.170/175
MODEL YEAR 2000
UPGRADING STARTAC TO TIMEPORT OR V60 TELEPHONE
A. Procedure
1. Remove all installed StarTac telephone components from the vehicle.
2. Remove the rear bumper.
Refer to WIS document AR88.20-P-2200M, “Removing and installing rear bumper”
3. Match the part number of the existing bumper antenna against the part number under Section B, Parts Information.
4. Replace the bumper antenna if the part number of the existing bumper antenna does not match the part number under Section B, Parts Information.
5. Reinstall the rear bumper.
Refer to WIS document AR88.20-P-2200M, “Removing and installing rear bumper”
6. Follow the telephone installation instructions outlined in P-I-82.64/144B, “Voice Activated Cellular Telephone/CD Changer Installation.”
B. Parts Information Part Name/Part Number
Antenna, bumper. A 220 820 19 75

This is the same as Micro tac phone systems.

You need to remove all old phone parts and replace with all v60+
phone parts. Using a old analog or 2 band PSE/antennea/linear Compensator
with a new phone will cause damage to system.

Then you can use the new Bluetooth puck with any compatible phone.
See www.wireless4mb.com for info on the v60 BT adaptor and compatible
BT phones.

I would suggest finding a wrecked 03+ and up s-class and get the whole
system including the bumper antennea.
check with Potomac wrecking. www.potomacgermanauto.com
They have all kinds of good new cars that are smacked.

Good luck.
DR.D