s211 No crank no start- Diagnostic Scan

[Nod]

I just had it scanned on Autel scanner, here are the findings/ fault codes below.​

Car unlocks ignition in key position 1, key position dash lights come on, key position 3 to crank car there is nothing. Also get ESP and ABS 'No display' on dash warnings.​

I have found if I take out the ESP 5A fuse, car will crank but cannot put it in gear. Put the fuse back in and it behaves as above and will not start.​

Swapped out ESP module, still the same. Had EIS swap/recode but has had no effect unfortunately. Any ideas? I am at a loss and stumped! I have unplugged every connector it seems, had the passenger footwell wiring exposed/ CAN connectors, cleaned the connectors, inspected wiring, checked relays/ fuses.... all to no avail!​

No idea what it all means, if anyone could help or has any ideas.

 

[DSK]

What model car is it - E.g 350 diesel?

On my w221 s350 with similar symptoms, all lights, no crack/start accompanied by no abs/esp and CAN errors, it turned out to be the terminal 87 relay for engine and chassis.

I should add mine had a second hand ecu, eis, a starter and fuel relay, a be can connector all to no avail. Some was a parts cannon som was have to go with what the Indy says..

I’m no expert but this sounds like a relay issue.


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[supernoodle]

Ignoring the stored faults, the others are reporting that the ECM has not received the expected CAN message from the several other modules.
For each module the ECM knows it needs to communicate with, one message that said module sends is defined as the golden message. If that message isn't received by the ECM, it will assume the other module is bad and flag a fault. (Modules send messages at a predetermined rate as long they are powered up, ie not event driven so this assumption is ok).

I would have suggested to see if you can interrogate those modules that the ECM says it's getting no response from, but it's clear from your scan results that you can't. They don't appear in the list of modules that responded to the scan. So if diag tool doesn't get a response and neither does ECM, that's rather telling.

So what have they got in common? Share the same power? Ignition/wake signal? Are they behind a gateway? Pick one and get some wiring diagrams and go poking around.

 

[Nod]

Thanks for the help and pointers.

Goodnews and Badnews :-
Found out it is the ECU, opened it up and there was definite signs of moisture and likely shorting. We gently cleaned it with contact cleaner and soft tooth brush and dried it out. Re-Installed and fired up immediately! No more error codes.

Sadly when driving, it soon reverted back to the non start state, which suggests there is most likely more serious problems on the ECU than I hoped. Tried a 2nd clean and its still the same. So looks like the only option is to send off ECU and attempt to get it repaired.
Anyone know of a good place to do this?

 

[DSK]

Thanks for the help and pointers.

Goodnews and Badnews :-
Found out it is the ECU, opened it up and there was definite signs of moisture and likely shorting. We gently cleaned it with contact cleaner and soft tooth brush and dried it out. Re-Installed and fired up immediately! No more error codes.

Sadly when driving, it soon reverted back to the non start state, which suggests there is most likely more serious problems on the ECU than I hoped. Tried a 2nd clean and its still the same. So looks like the only option is to send off ECU and attempt to get it repaired.
Anyone know of a good place to do this?

ECU Testing located in Heanor. It’s a whopper of an outfit and I have had units for other cars done their.

On my w221 we used a cloned ecu which may be an option you want to check.


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