Engine | 111 in model 124, 163, 170, 202, 203, 208, 210 |
Engine | 112 in model 129, 163, 170, 202, 203, 208, 209, 210, 211, 220, 230 |
Engine | 113 in model 129, 163, 164, 171, 202, 203, 208, 209, 210, 211, 215, 219, 220, 230, 251 |
Engine | 137 in model 215, 220 |
Engine | 155 in model 199 |
Engine | 166 in model 168 |
Engine | 266 in model 169, 245 |
Engine | 271 in model 171, 203, 209, 211 |
Engine | 272 in model 164, 171, 203, 209, 211, 219, 221, 230, 251 |
Engine | 273 in model 164, 209, 211, 219, 221, 230, 251 |
Engine | 275 in model 215, 220, 221, 230 |
Engine | 285 in model 240 |
Engine | 611 in model 202, 203, 210 |
Engine | 612 in model 163, 203, 209, 210 |
Engine | 613 in model 210, 220 |
Engine | 628 in model 163, 211, 220 |
Engine | 629 in model 164, 211, 221 |
Engine | 640 in model 169, 245 |
Engine | 642 in model 164, 203, 209, 211, 219, 221, 251 |
Engine | 646 in model 203, 209, 211 |
Engine | 647 in model 211 |
Engine | 648 in model 211, 220 |
Engine | 668 in model 168 |
For some time our vehicles/engines have been equipped with alternators which communicate with the ME or CDI engine control via an interface.
This results in changes to the system diagnosis and when testing the alternator:
A distinction is made between the conventional alternator with terminal 61 without interface and alternators with BSS interface or LIN interface.
"CONVENTIONAL" alternator not networked with the control unit
No form of communication between the alternator and the control unit
The control unit cannot assist during the alternator test
Testing not possible with XENTRY Diagnosis - only with external technology (load tester)
"BSS" alternator networked with the control unit via a BSS
- BSS = Bit Synchronous Interface,communication control unit alternator
Testing via control unit - XENTRY Diagnosis possible
"LIN" alternator networked with the control unit via a LIN
- LIN = Local Interconnect Network, communication control unit XENTRY Diagnosis possible
Testing via control unit - XENTRY Diagnosis possible
In addition to the above-mentioned information, WIS release 06/2006 also contains a function description concerning the topic "Power supply for on-board electrical system".
With "conventional" alternators, it is important to note that the full charging current is not generated immediately after the engine is started. The full charging current is only generated after a load response delay.
It is essential to observe the information in the description "Load response" in the document GF15.40-P-0001A.
The following is an overview of the engine model designations with the corresponding alternators: |
Engine | Engine control unit | Alternator |
111 | PEC, HFM-SFI, ME2.0 | CONVENTIONAL (without interface) |
112, 113, 155 | ME2.8 | CONVENTIONAL (without interface) |
137 | ME2.7 | CONVENTIONAL (without interface) |
166 | ECM | CONVENTIONAL (without interface) |
266 | SIM266 | LIN |
271 | SIM4 | BSS |
272, 273 | ME9.7 | LIN |
275 | ME2.7.1 | CONVENTIONAL (BSS alternator, but is not supported by engine control unit) |
275 | ME2.7.2 | LIN |
285 | ME2.7.1 | CONVENTIONAL (BSS alternator, but is not supported by engine control unit) |
611, 612, 613 | CDI | CONVENTIONAL (without interface) |
628 | CDIV1 | CONVENTIONAL (BSS alternator, but is not supported by engine control unit) |
629 | CDI 5 | LIN |
640 | CDI A | LIN |
642 | CDI 4 | LIN |
646 | CDI 3 | CONVENTIONAL (without interface) |
646 | CDI 3 (UP) | BSS |
647 | CDI 4 | CONVENTIONAL (without interface) |
648 | CDI 3 (UP) | BSS |
668 | CDI | CONVENTIONAL (without interface) |
One of the basic innovations is the diagnosis capability of the alternators with BSS-/LIN interface. These can be tested with XENTRY Diagnosis and without an external tester.
The test step for the engine model designations described below is listed in XENTRY Diagnosis in the CDI control unit under
"Actuations" and "List of guided tests" or in the ME-SFI control unit under
"List of guided tests" and as of DVD 01/2006 also under "Actuations".
The communications between XENTRY Diagnosis and the control unit detect whether a BSS interface or a LIN interface is present.
The test prerequisites for the alternator test are listed in XENTRY Diagnosis and must be observed; the test itself is arranged as a test sequence and is menu-assisted.
In addition, the specified values for the charging current and the charging voltage have been updated for all alternators.
It should be noted in particular that the upper limit value of the charging voltage can now be up to 15 V.
Refer to the current documents in the workshop literature for the valid specified values.
As of 11/2005, the changes listed under the respective testing/repair work (Group 15.40) and operation items (Group 15) are published in WIS.
Current overview of engines on which the alternator test can be carried out with DAS as of the approval date stated: |
Engine | Engine control unit | Alternator | DAS enable |
266 | SIM266 | LIN | DVD 11/2005 |
271 | SIM4 | BSS | DVD 08/2005 |
272, 273 | ME9.7 | LIN | DVD 11/2005 |
275 | ME2.7.2 | LIN | DVD 02/2006 |
640 | CDI A | LIN | DVD 11/2005 |
646, 648 | CDI 3 (UP) | BSS | DVD 09/2005 |
642 | CDI 4 | LIN | DVD 11/2005 |
629 | CDI 5 | LIN | DVD 11/2005 |
Future engine model designations will also be equipped with these interfaces. We will provide the appropriate information on this via the workshop literature.
All alternators which do not have a BSS/LIN interface cannot be tested with XENTRY Diagnosis.
These are still intended to be tested using the load tester.
The relevant AR documents are stored and updated in WIS (as of 11/2005).