Isocyanide

This is a repost specifically to the diesel forum. I posted it in the W211 forum too.

Newbie Member here! DO let me know if I am posting something in the wrong place.

I had driven it this morning for 100 ish miles and everything was working normally. Stopped for lunch and then when I went back to the car the following was observed when I turned in the key into its different stages:

1. Ignition One - everything functional, All lights come on.
2. Ignition two - The glow plug light does not come on, everything else seems normal.
3. Start - No crank followed by two errors ( ABS - visit workshop and ESP - visit workshop)

Tried it with both keys and showed the same characteristics.

Not sure where to start looking at the issue. New to Mercedes and diesels. Bought this car 3 months ago and have put 5000 miles on it and everything seemed to work fine. Now I am stuck with a car that just won't respond at all.

Additionally, my Autel car scanner is not able to link at all to the OBDII port. Communications failure? Something like that.

I think it could be the ECU relay/fuse as there is a communications issue with the car I am more inclined to think the same.

I think a couple of relays/fuse and the auxiliary battery are situated in the trunk. Over the memorial day weekend, I had a couple of these stupid twist open beers open up in the trunk. Is there a ground wire running through there? Any specific places I should look for corrosion?

While since then, the car has performed fine, just covering my bases.
Any leads would help A LOT!

Plutoe

Regrettably it could be a number of things and without a good quick test to guide your efforts, you are going to be sent on any number of goose chases in the name of I think so or my neighbor had the same case five years ago or back in the ole country we replaced the fan blades bla bla

Isocyanide

Plutoe,

I completely agree with you. But the nice folk of the internet are seldom wrong! Joking aside, I was hoping someone on here would know what would be a good quick test to guide my efforts.

What would you do if it were you?

kajtek1

ABS light most of the time is the first thing that comes with low car voltage.
Display car voltage during starting attempt and test the battery.
Did the scanner work on the car before? Its failure might be voltage-related as well

Towmater

^this.


If you have access to a multi meter, you can quickly check continuity on each fuse. As well as battery voltage. I would start there.

Isocyanide

@kajtek1 @Towmater Thank you for that. This morning when I was just quickly trying my luck again before heading out. The car was giving me a "low battery - certain options wont work" on the dash. I didnt test it further though but the first time I turned the key in the glow plug lighted up for a fraction of a second.

What should be the right voltage of the battery? And if it comes down to replacing; Any comments on a good aftermarket replacement?

kajtek1

You don't say how old is your battery?
Low car voltage can be result of bad battery, or bad charging system, so it is better to do more testing, before buying new parts.
Your car can have wet battery and the best deal I am fining is Bosch battery at PeepBoys.
Slightly above $100 with internet discount and unbeatable 96 months warranty.

Isocyanide

@kajtek1 As I bought the car a few months back; My knowledge of when the battery was last replaced if at all is limited.

Will start with the battery and alternator check then.

Towmater

After you have it running you should be able to pull all the module errors and see if there is an open or grounded circuit anywhere.

Well, I would reset all the codes becuase low batt volatage does weird things, but the module errors should remain.

Isocyanide

Noob question; @Towmater @kajtek1

Are diesels the same to Gasoline engines when being jump started? Also am I gonna ruin something else if I jump start the E320?

If the battery is the issue then I was thinking a jump start might work... But then I have owned a diesel for like 5 mins (3 months)... So I dont wanna end up doing something mega stupid. Additionally I know that certain cars dont like being jump started...

mtrevelino

The attached is out of the owners manual from my 2006 cdi. Personally, I would not like jumping my vehicle or jumping another vehicle as there are way too many electrical components you could fry.
Mike T.

BrokenCdi

Hope it's not you ecu...


https://mbworld.org/forums/diesel-fo...-no-crank.html

Isocyanide

@mtrevelino Thank you for pointing me in the right direction!

@BrokenCdi How did you diagnose for a faulty ECU? What would the steps be?
Also IF the ECU is faulty, who did you send it out to? Any good contacts?

BrokenCdi

I checked all the fuses in the trunk, front sam and the big ones under the passenger foot well carpet, all were good. Scanned the car with mb icarsoft2. Got some under voltage codes which lead me to believe it's a bad battery.Next i replaced both batteries, and then for good measure replaced the voltage regulator on the alternator as well.
After that i figured that i'm in way over my head and brought the car to a local mb specialist. Told them what i did, they hooked up the factory scanner and i was told they are 95 percent sure it's the ecu. Was told something along the lines of ecu not pushing out enough voltage on a certain pin. Had them remove the ecu, send it in for repair and reinstall it.That did the trick and the car hasn't missed a beat since. Bluelinkdiag did the ecu repair.

Edit: i don't remember anymore if my scanner was able to connect right after the no start condition, or if it connected once the car was started using the jumper pack.

Isocyanide

So funny story time;

I get home today and the car starts perfectly without any issues today and doesn't show any errors on the dash. Did it a couple of times; Every time it started up right away.
The difference between yesterday and today? Nothing! I hadn't really fiddled with the car yet (Except checking the diagnostics fuse and the engine starter fuse) .... it was a hot day yesterday and today has been rainy? :P

Now putting an independent shop scanner to it, there were no global errors but some specific modules had stored errors with weird numbers...

9051 - Consumer Shutoff Stage 1
53F0 - CAN communication with control unit Engine management is sporadically disturbed
6210 - ABS anti-lock braking system control
4A30 - Engine control module not identified or incorrect control module

Do any of these make sense to anyone? Should I get the ECU re-coded and re-SCN ed?

kajtek1

Were those codes pending, or historical?
Clear them out and recheck after a day of driving

Isocyanide

They were historical. I am worried I might have to meddle with the ECU if there is truly a communications issue. Some posts have shown that updating the ECU software has helped....

https://www.benzworld.org/forums/w21...mittent-2.html

nepper888

Hello! Sorry to my bad english. I have a 05” 320CDI V6 with sbc 7G, My car show a ABS/ESP Fault, and didn’t show the gears, enegie is start but the transmission is not! We changed ESP module and the diag is say not good the module number. But the parts code same. The diag say i have a CAN-BUS fault.
Someone have any idea?
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