newtis.info

 

Thanks for the link, I will keep these handy. Even though I don't have much experience with wiring diagrams, they're good to have on hand.

 

Did you figure this out?

 

No, not yet. I'll try to figure out those wiring diagrams, but would greatly appreciate some real world advice.

 

What codes are you getting from the car? Should always read off error codes and list them here as it will help pointing in the right direction.

 

Thanks for the reminder. I have to admit, I've hesitated pulling codes because the last time I tired to clear all the old ones in order to pull new ones the whole car shut down. No power, nada, zilt. Everything came back after I gave it a jump start, so in hindsight I think it was because the battery was done and now that I've replaced it I shouldn't run into that issue again.

 

Just clearing codes won't hurt anything (other than losing the info on the codes if you don't record them, that is). ;-) I think you're probably right about what happened last time - I wouldn't worry about it "happening" again.

 

I was finally able to pull the following codes:

A46D/not present - CID: CID malfunction due to peripheral
A468/present - CID: External Open circuit (LVDS data line)

I cleared a bunch of other codes that I think were old, and will pull again after driving the car this week.

I haven't yet installed the fiber optic loop as I'm not sure where to install it. Guidance on this would be greatly appreciated!

 

Your amp and the telephone module are.located in the trunk left side. You will have to take apart the trunk interior on that side to get to it. The loop is meant.to be used as a diagnostic tool to find the problematic unit. Have you checked all of your fuses? If one of the units is not getting power, it will take out the entire i drive since the fiber optic network is a loop through all of the modules. Go through all of your fuses first . That could speed up your diagnostic process

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I've checked the fuses I thought were relevant, but perhaps I should go through them all again just to rule them out. If that doesn't prove to be the issue, I'll need to figure out how to unclip the OPTIC MOST terminator with the green wires shown in the above picture, preferably without breaking it, so I can test the fiber optic connections. Direction on how to do this would be helpful.

 

These are the relevant fuses I'll check again. Please let me know if there are others that could be related.

CD Changer - 38
Radio - 34
Telephone - 37
Radio Amplifier - 80
Telephone - 52/56

Car Does Not Have
Satellite Radio - 67
Navigation - 35
Video Unit - 67

 

With the car ignition on, pull the fiber link from the amp. One of the two cables should be lit. If it is, move to the next module in the loop. The amp is i think the halfway point in the fiber loop so you can narrow down where to look. If not lit, then the issue is before the amp, if it is lit, then the issue is at the amp or after. Search YouTube for videos for Idrive troubleshooting. Thats how I learned

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In your first post you said your issues began when you replaced your MPM. Did you replace it with a brand new one or used? Also, is your MPM still located below the spare tire? If it is, move it next to the amplifier. The cabling is long enough to route it there. If the original MPM is burned, it may have taken out a module with it.

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Thanks ipaul, I greatly appreciate your advice. I replaced the MPM with a new one and relocated it to the side.

I've watched some Youtube videos but haven't seen any specific to my '05 E60, so I'm slightly unsure which wires to unplug. You can see from the picture of my car's setup that all the fiber optic wires seem to run through the OPTIC MOST terminator, so I think that is where I need to do the testing. Most of the wires running into the amp and TCU are bundled into large connectors so if I have to mess with those the job will be more complicated.

 

I was able to figure out how to disconnect the Optic Most terminator, and disconnect the 3 pairs of fiber optic wires. Unfortunately, with the ignition turned on, none of the wires seemed to light up. I could be missing something here, but I'm assuming it would be pretty straight forward to see if they lit up.

In summary, my iDrive stopped working and I found my MPM had a hole burned through it. I replaced it with a new OEM MPM and relocated it to the side. I have the "SOS not working" message on my dash, and my iDrive is blank. I have checked the above mentioned fuses (as well as the fuse on the back of the CIC) and today actually found a blown fuse for telephone, but replacing the fuse did not seem to have any effect. I've managed to disconnect the 3 pairs of fiber optic connections, but they don't appear to be lighting up.

 

The blank iDrive screen shouldn’t have anything to do with your MOST bus being down. That’s your CID not seeing a video signal from your MASK via the LVDS cable.

The SOS not available likely is a result of your MOST bus being down. There is no communication with your TCU which is shown in your original photo. The TCU MOST connector is on the bottom, almost touching your trunk floor pan. That is what the MOST jumper would connect to. Some disassembly will be required to remove the MOST fiber optic connector from your TCU


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Thank-you, that is very helpful information. I'll work on the TCU MOST connector and see if I can get it sorted, but the SOS not available is not that big a deal.

My bigger issue is getting the CID working. If I understand you correctly, one of three things could be causing my iDrive to be blank. Either my MASK is shot, the CID is shot, or the LVDS cable is not connected correctly (or faulty). I'll see if I can find any info online about testing the MASK or CID. I'd like to figure out if either has failed before randomly replacing expensive electronic components.

I should also mention, after reading online, that I was having some issues with the CD player before this happened. If memory serves, it was skipping and/or not reading the disk. I have read that on CCC units, the DVD reader can start to misfire, rending the whole unit unable to start. Just wondering if this could also have contributed to the problem (and also wondering if there is any way to get the CD out of the CID).

Thanks again for the info, it is greatly appreciated!

 

Ever find the fix ? Very interested

 

I took it into my great independent mechanic who found broken wires in the PS foot well. IIRC, in the early E60's the control modules are wired in such a way that an error from one can result in error readings from all the others, leading to a sometimes long investigation to find the offending module. But in this case it turned out to be PS foot well wiring. My mechanic was disappointed in himself for not finding the issue sooner than he did.

 

Hey, I'm having the same issue with a 2005 E60. What do you exactly mean by the broken wires in the PS foot well? I am new to BMWs.

The MPM and the PDC module got wet. They don't seem to have any kind of water damage aside from a little corrosion on the pins directly connecting to the harness.
I've cleaned it off today and haven't tested it.