cwmateiuc

Hi guys, figured I would try in here as the W211 AMG forum seems incredibly knowledgable.

I have a 2005 W211 E500 4-Matic at the moment that will not crank.

The story behind it is this...

The car was purchased and the airmatic was having issues (the pump was going bad) - the so called mechanic thought it was something else, started jumping wires, when he jumped the airmatic compressor wire, it sparked and the car would not start anymore (the car ran perfectly fine before this).

I scanned the car with STAR.

Everything seems to communicate fine, but I get absolutely no communication with the ESM (Electronic Shift Module) and no communication with the LCP (Lower Control Panel - where the airmatic buttons are)

When I am in the "drive authorization" screen, I get:

EZS: Turn enable issued YES
ESL Start Enable YES
ME Motor electronics: start enable NO

When I am in "Check output of circuit 50" screen and the key is in the "crank" position, I get:

Status of the relevant actual values:

Output 'Circuit 50': ON
Output Terminal 50: OFF

Specified Values

Output 'Circuit 50': ON
Output Terminal 50: ON


So it seems as though something is not giving the "OK" to allow the car to start.. An idea would be that since there is no communication with the ESM (Electronic Shift Module), the car does not know what key it is in, therefore not allowing the car to crank.

I am trying to figure out what could cause the non-communication with the ESM and LCP.

Anyone have any ideas or input on this? Maybe what I can check, or what they both have in common?

Ls1toAMG

Check all fuses then unhook both neg cables to battery's overnight to reset .

kompressede

^ This first.

Rocman8

interesting that the ESL is giving a "yes" for start enable but at the same time you can't communicate with it. ME says no start enable so hopefully that thing didn't get zapped.

cwmateiuc

Hopefully not, I'm hoping it's a fuse.

I have checked most of them, I'll go through again.

The ESM lights up, but I can't connect to it through STAR and I can't connect to the Control Panel that controls the Airmatic either.

I'm assuming they have something in common, maybe a fuse or relay, or a SAM.

The wire he zapped, I'm 99% sure it was the wire to the airmatic compressor, coming out of the front SAM.

But I communicate with the front SAM fine and I found 0 codes or errors.

So my next step is to check everything again under the passenger side carpet.

Anyone have any other ideas?

uraberg

Not for getting the car fixed. Now, stringing up your mechanic, I've got some ideas about that.
One thing I've learned from other people's misfortunes here; when dealing with electrics on this car, you go by the book. No shortcuts.

I admire your (perceived) attitude towards the mechanic.

You seem to know your way around STAR, hopefully you'll get it diagnosed.

cwmateiuc

Haha thanks.

I'm trying! It's a paper weight sitting in my driveway.

cwmateiuc

Update: I found the LCP became disconnected, I connected it and it seems to communicate.



Okay, so the car will not communicate with the ESM. The car is in park, but the computer doesn't recognize that it is.

It also doesn't seem to want to connect to the transmission, but that could be my misuse.

I can communicate fine with every SAM, the shifter connects to the passenger SAM, and it won't connect!

Also, if you look at the pictures immobilized is enabled and start enable is set to NO.

So my guess is that either the shifter is bad, or the passenger side SAM is bad. I can't think of anything else.

I think I literally read every value the car is producing in the last two hours.

bbirdwell

FWIW, two of your screens share a common potential fault, Circuit 87.

Fuse F63 (15A) in the front SAM, and the circuit 87 relay (N10/1kI) may be at issue.

Additionally, control module N51 (Airmatic with ADS control module) has a "terminal 87" voltage test. Relay N10/1kI is the terminal 87 relay.

Edit:
Without having the schematics at hand, could the compressor A9/1 be on the same circuit as the control module N51 which has a test for voltage at terminal 87 which is powered by the terminal 87 relay?

Note: Module N51 trouble-shooting step also shows N10/1f45 (fuse 45 in front SAM) as a voltage supply.

cwmateiuc

Thanks for the help

I just tested resistance on every relay and tested every fuse in the car, everything is good.

I'm suspecting it's the passenger SAM that got fried.

Also, do you happen to know where this connector goes?





I'm pretty sure that's the wire he jumped that is causing the problems.<br/><br/>The red is hot, the brown shows nothing and neither does the pink.

cwmateiuc

Okay, so it seems as though the red wire I pictured above, goes directly to the passenger SAM and it is not protected by a fuse.

So I now need to find out which SAM controls what is not working (ESM) and replace it, as it would most likely be the passenger or driver (under the hood) SAM, since the wire that was jumped goes direct to both.

My guess is that the passenger side SAM needs to be replaced.

Rocman8

i thought those wires just went to the wiper motor

cwmateiuc

UPDATE:


I replaced the passenger SAM, still won't start.

On the dash, when the key is in the running position, it does not show which gear the car is in. Any ideas?

cwmateiuc

Update:

AirMatic computer was faulty and clogging the CAN network. Replaced with a working one and the car starts and runs great.

Elhonaz

How did you figure that out?

So the control module for airmatic was changed?

cwmateiuc

It was narrowed down by disconnecting modules from the CAN system one by one until the car was able to start.

I replaced the airmatic computer and haven't had an issue since.

E63007

RPB

Strigoi

Your problem has nothing to do with what this thread is about.