Parts Catalog Accessories Catalog How To Articles Tech Forums
Call Pelican Parts at 888-280-7799
Shopping Cart Cart | Project List | Order Status | Help



Go Back   PeachParts Mercedes-Benz Forum > Mercedes-Benz Tech Information and Support > Tech Help

Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 07-18-2002, 01:34 PM
RunningTooHot's Avatar
Registered User
 
Join Date: Aug 2000
Location: Here
Posts: 898
Fault Code 17 (data exchange problem) & Dealer B.S.

My own personal “onboard diagnostics” detected a fault code – “B.S.” arising from the dealership service writer.

On a 1994 E420 (124 w/ M119 engine, 88,000 miles) :

I just had the infamous wiring harness replaced (along with the Mass Air unit and few other non-related items) & I specifically asked them to give the throttle slide assembly a good looking over while they were in there – they said it is O.K & sent me along my way.

The car ran GREAT. For about 6 miles. Now, fault code 17 is popping up again, and the dealership service writer says that it is caused by a vacuum leak. Give me a break – code 17 relates to a data exchange fault between modules, but I’m not sure which specific modules, or if this is a general code that requires further investigation to determine which module is having problems communicating. (Throttle slide, anyone?)

Anyone have any comments about this? Please let me know what you think! I’d really like to be barking up the right tree… And maybe, just maybe, it could be caused by a vacuum leak – although I strongly suspect that is not the case.

RTH

Reply With Quote
  #2  
Old 07-18-2002, 03:57 PM
engatwork's Avatar
Registered User
 
Join Date: May 2000
Location: Soperton, Ga. USA
Posts: 13,666
It will idle rough if it is a vacuum leak.
__________________
Jim
Reply With Quote
  #3  
Old 07-18-2002, 05:22 PM
Moderator
 
Join Date: Mar 2000
Location: Gainesville FL
Posts: 6,844
The testing for this CAN code includes unplugging theDM and reading the resistance between CAN L and CAN H. In further tests it looks at the CAN element in the engine control module (N3/4) and separately the CAN element in the EA/CC/ISC controller.

I agree that vacuum leaks aren't part of the problem. Reset your code and see if it comes back.
__________________
Steve Brotherton
Continental Imports
Gainesville FL
Bosch Master, ASE Master, L1
33 years MB technician
Reply With Quote
  #4  
Old 07-18-2002, 06:03 PM
JimF's Avatar
'94 S500: only 793 sold!
 
Join Date: Mar 2001
Location: San Diego, CA
Posts: 1,933
DTC 17 for Diag Module

is, as you say, "Data exchange fault between individual control modules".

Also DTC 17 for the LH-SFI Module is "CAN data: Elec Acc Module - no data transmission". So suspect the new harness is not guite right especially if it worked ok before the harness swap.

With an ohmeter, remove the Diag Module, then check the resistance between the TWO WIDE PINS; sb 60 ohms +/- 5.

Pull out the LH-SFI (N3/1) module, then check the resistance between the TWO WIDE pins; sb 120 ohms +/- 5.

Then check that there's continuity between the corresponding pins between the two modules. Most likely one or both is not making. That's due to the wiring harness 'replacement'.
__________________
Regards . . . . JimF
-------------------
'94 S500 Cpe

Visit my Mercedes Web Page
Reply With Quote
  #5  
Old 08-05-2015, 08:47 PM
mespe's Avatar
benzbonz
 
Join Date: Feb 2005
Location: Cleveland, Ohio
Posts: 1,848
Quote:
Originally Posted by JimF View Post
is, as you say, "Data exchange fault between individual control modules".
This I understand, and am having the same 17 blinks on the DM

Quote:
Originally Posted by JimF View Post
Also DTC 17 for the LH-SFI Module is "CAN data: Elec Acc Module - no data transmission". So suspect the new harness is not guite right especially if it worked ok before the harness swap.
Now this is confusing, because the DM is port 19, but the LH-SFI module is port 4. I take it the info below refers to 17 blinks on port 19 of the 38 pin socket, NOT the 17 blinks on port 4

Quote:
Originally Posted by JimF View Post
With an ohmeter, remove the Diag Module, then check the resistance between the TWO WIDE PINS; sb 60 ohms +/- 5.

Pull out the LH-SFI (N3/1) module, then check the resistance between the TWO WIDE pins; sb 120 ohms +/- 5.

Then check that there's continuity between the corresponding pins between the two modules. Most likely one or both is not making. That's due to the wiring harness 'replacement'.
Trying to figure out the 17 blink port 19 Diag Module issue.

__________________
Closing the store
Benzbonz.biz
on your smart phone or tablet.

Last edited by mespe; 08-08-2015 at 03:50 PM.
Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On




All times are GMT -4. The time now is 12:51 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2024, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2024 Pelican Parts, LLC - Posts may be archived for display on the Peach Parts or Pelican Parts Website -    DMCA Registered Agent Contact Page