'05 CDI "communication fault" N14/2 Glow Output Stage 2538-4 jay-bob? - Page 2 - PeachParts Mercedes-Benz Forum

ROLLGUY · #1 12-26-2022, 07:30 PM

I am not sure how to fix the problems, as the part of the SDS system that shows diagrams and repair info shows an "Internal Error...... file not found". The 930 code is still there, and the system will not let me go further without displaying the internal error message. This is probably a fault with my software ($99 hard drive from China). Please view photos, and let me know if you have any ideas. Thanks!

TimFreeh · #2 12-27-2022, 09:55 AM

The long list of error codes are the entire set of possible errors with some additional information and troubleshooting sets. They are not indicating the error occurred, you're supposed to use them for specific testing of components like you did with the alternator.

I have no idea what the alternator test is supposed to show. There are voltage lines and current traces so I'd guess N3/9 is supposed to manipulate the voltage regulator via the LIN bus and see associated changes. I don't know if the high/low traces are supposed to be upper/lower limits? Not sure how this test is supposed to work? If N3/9 commands the alternator to ramp-up the alternator to 100 amp delivery where is the associated current supposed to go?

Agree it seems like your version of SDS doesn't like the results of the test.

I've seen the 'file not found' error before on many bootleg SDS systems. I'd guess its just missing data that was not correctly copied by whoever set up the system. Not sure its really fixable, way over my capabilities.

I went on the EPC and looked up the alternator and regulator part numbers for the 211.026 series... there are 4 possible different alternators and 6 different voltage regulators that can be used depending on model year and engine serial number. Kind of a mess.

Are you still getting the unable to communicate with the glow-plug module error?

dieselbenz1 · #3 12-25-2022, 03:39 PM

With engine running you have communication errors?
With engine not running you can see modules but not clear codes?

ROLLGUY · #4 12-26-2022, 11:58 AM

Quote:

Originally Posted by dieselbenz1

With engine running you have communication errors?
With engine not running you can see modules but not clear codes?

This problem was only the last time I used my MB II on the car. A couple days ago to make the video, I could access and clear data in every other module save the CDI module. I was able to see the DTC's, but not clear them in only this module. I then tried it the next day, and I got the 930 codes, and could not continue.

Stay tuned, I will get back to the car this afternoon, hopefully with more good info after scanning with my (extremely slow) SDS computer.

dieselbenz1 · #5 12-26-2022, 12:25 PM

Should your scanner operate differently ie not be able to communicate with engine running vs engine not running and scanner working this would indicate? One major difference is the alternator is spinning putting electrical noise on the Lin and causing these scanner issues.

ROLLGUY · #6 12-26-2022, 12:34 PM

Quote:

Originally Posted by dieselbenz1

Should your scanner operate differently ie not be able to communicate with engine running vs engine not running and scanner working this would indicate? One major difference is the alternator is spinning putting electrical noise on the Lin and causing these scanner issues.

I don't think the engine running or not should have any effect on the scanner working or not. I often use it for live data, and that requires the engine to be running.

dieselbenz1 · #7 12-26-2022, 04:03 PM

Ooops didnt mean to misslead you my notes must be wrong.

ROLLGUY · #8 12-26-2022, 06:56 PM

Quote:

Originally Posted by dieselbenz1

Ooops didnt mean to misslead you my notes must be wrong.

No problem, I just want to make sure I get the right part. It is not an easy job to replace the alternator in this car. However, with the new information I have, it may just come to that.