DansGL

My R350 2010 woke up one morning with every warning on the dash lit up. Esp, abs, teleaid etc etc.
etc etc. Engine started but radiator fan on high speed only. I tried reading codes with my trusty icarsoft but it says that it can't communicate with ecu. I changed the central gateway due to some serious corrosion. Then all errors disappeared but still can't communicate with ecu and the turn signal and wipers don't operate. I changed the rear SAM with no change.
Any ideas?

efzauner

Join the crowd. see my thread should still be up there. Car in shop now. Will update.
Something is interfering with canbus. Could be voltage regulation issue or a bad module, or bad connection on the can bus.

Stay tuned.

DansGL

Well glad to hear that I'm not alone.

DansGL

Upon closer inspection to the connector going to the cgw, I found bad enough corrosion to change it. Mercedes Barrie wouldn't get it for three days. I went to Sayal electronics and found connectors to fit. Then soldered the wires on and plugged it in.
Now the car starts and operates just fine....... ...Mostly. radio still stuck with anti theft activated.
The red battery warning on the dash still comes on. I also have an obd code of U00002 some sort of can bus quality code.
No CEL but delve deep in the systems via diagnostic tool finds that all codes that can be on are stored in every module.
I am having a really strange can bus problem but at least I can drive

DansGL

Well: 50 km of driving and still the red battery warning stays on in the dash. Also Comand system still stuck on "Anti theft protection activated", Otherwise car is back to her old self.

efzauner

keep us up to date. I also had a can bus warning but my simple generic obd2 reader was able to reset it. you may have to bring to dealer of find an indy to clear the indivudial can bus module codes.

DansGL

efauzner,
which module did you enter to reset your problem?

efzauner

It was a generic OBD2 code about lack of can bus communication to instrument panel. Generic code reset. If any specific SAMs need resetting that are not generic OBD2 you will need a specific code reader/resetter.

DansGL

I used the icarsoft 980. (great little machine) Reset every code in every module. No changes, but these two codes remain persistent:
905E discontinuity in line to G2 (generator)
9115 Control module AAC not sending data.

No idea what the components are as there is no description of these codes. Nor do I know if they are related to my issues.
Can anyone help with these weird codes?

DansGL

So, I have distilled electrical problems to the following info:
AAC wont send data (Canbus?)
G2 (alternator) has discontinuity
ISM intellignet servo (canbus)
Comand system is in "Anti theft protection"

Car works perfectly well except for the radio and the fact that the alternator is always charging and red battery light is on.
What do all these components share?

Thanks for looking

DansGL

Wow this is a pretty lonely place. Did I forget to put on deodorant?

DansGL

Does the central gateway need to be programmed to the car? Parts dept says no but I have no canbus interior.
Thanks

DansGL

Update again.... I called MB Barrie service dept and they say that the CGW does indeed need to be coded to the vehicle. I asked parts dept specifically (twice) if coding or programming was necessary and they said no (twice)
Sounds as though we have found the problem ( I hope) I have an apptmt next week and will update again. If there is anyone actually on this forum or reading this.

Dan

efzauner

Also get your alternator checked for over voltage, overcurrent.

DansGL

Wow! another person! Thanks efauzner.
I measure between 13.90 and 14.20 Volts while running. So I figured the alternator was probably good. What do you think?

efzauner

well see my thread...I had every module show failure... tow to dealer. dont shift etc. SRS ABS ESP. I even pulled the ESP fuses and then I got a "press brake pedal to put in gear" Replaced fuses and all worked again... Very very odd symptoms with no logical connection. I was alternator over voltage. hopefully. . they replaced alternator monday and have had no problems since. I dont know how exactly but somehow modules have over voltage protection shutdown or some other way that voltage spikes cause problems. That is understandable. Not the first time someone on this forum has electronic problems that are fixed by new alternator or battery.

i also assumed the same: Voltage was fine so I changed batteries because things seemed to work after I charged overnight. Most of us do not have equipment to check alternator under full load. Indy said was putting out 300 amps.

The reason you are not getting many responses is that these module can bus codes are difficult to fix unless you have one of the MB specific OBD2 Canbus readers. They are $200+ Only one or two guys here have one.
Most recommend bringing to dealer or good indy. . Also some of the stuff you mention is even hard to find on service docs. I have Alldatadiy and some of these things are impossible to find good troubleshooting data on. I dont even now what your CGW or ACC is! I would have to look that up even.

We tend to look at all the complex issues.. often it is simple.. get your alternator checked! I argued with the indy about this.. but even with an EE, there are some car failure modes that I do not know about! Life long learning!

DansGL

Thanks for the reply. I do have a MB specific reader. the icarsoft 980. Cant do everything, but it can read everything. That's how I got the info I did. I have a star unit but the laptop wont connect to the multiplexer. (?)
Anyhow, the CGW is the central gateway module. AAC is the automatic air conditioning module. I am still pretty sure that the CGW's lack of programming is causing these faults. All these things do end up talking to the CGW. I suppose I'll find out next week at my apptmnt.
Talk to you later!

budagen

I'm not sure if this will help you with your electrical gremlins, but I'd like to share what I recently experienced regarding CGW. My R320 had dislodged sunroof drain hose (probably with age and drying), and caused rain water leaving down A pillar, eventually trickling along wiring harnesses going to CGW. Symptoms are continuous beeping, SRS, and no start of engine. I suspected the damp carpeting may have something to do with it, I pulled it up and inspected driver side footwell. I got to peek into the wiring loom and saw corrosion in the two plug connectors to CGW. I just brushed it and sprayed with Deoxit. Plugged it back in, and the care operated as normal thereafter. So if your CGW was not burnt, or why not just plugged it back in and and see what happens. That way, you don't need to recode it. I hope you get to the root cause of your car problems.
There's very few of us R owners nowadays.

DansGL

Thanks for the message. My CGW was badly corroded and I even needed to replace the connector. So I had to get a new one.

DansGL

Well after changing the CGW, cutting and repairing the wires and connector. The car drove normally but still had some weird small issues (see previous posts) I brought it into the dealership to get it coded to my car last night. It worked and all strange issues are gone. Battery is recognized, anti-theft gone on radio and rear SAM has no more codes.
That was my weird electronic issue story. Hope it helps someone in the future.

Dan