318 Ho Syst Diag (Gc_jl_jm 01-09-03

Networking and the System Diagnosis (SD) Control Module

318 PP Syst Diag (GC_JL_JM)

These technical training materials are current as of the date noted on the materials, and may be revised or updated without notice. Always check for revised or updated information. To help avoid personal injury to you or others, and to avoid damage to the vehicle on which you are working, you must always refer  to the latest Mercedes-Benz Technical Publication and follow all pertinent instructions when t esting, diagnosing or making repair. Illustrations and descriptions in this t his training reference are based on preliminary information and may not correspond to the final US version vehicles. Refer to the official offi cial introduction manual and WIS when available. Copyright Mercedes-Benz USA, LLC, 2002 

Reproduction by any means or by any information storage and retrieval system or translation in whole or part is not permitted  without written authorization from Mercedes-Benz USA, LLC or its successors. Published by Mercedes-Benz USA, LLC  Printed in U. S.A.

Objectives •

List List the the ECU ECUs s not not on eit eith her CANCAN-B B or or CA CAN-C N-C

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Locat cate fo four X3 X30 co connectors on on an an R2 R230

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Explain Sy System Di Diagnosis (S (SD)

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Explain what SD does

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Describe SD SD ad advantages

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Explain SD limitations

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Locate N55 on the vehicle

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Expl Explai ain n wha whatt to to do do whe when n SD SD mod modul ule e or or CAN CAN-B -B modu module les s are are repl replace aced d

Networking Notes •

Cont Contro roll uni units ts conn connec ecte ted d to to bot both h CAN CAN-B -B and and CAN CAN-C -C:: – EIS: Electronic Ignition Switch (N73);  Also serving as a gateway for  diagnosing CAN-B components not hard-wired to X11/4 – ICM: Instrument Cluster (A1) Cluster (A1) – SCM: Steering Column Module (N80)

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Cont Contro roll uni units ts not not dir direc ectl tly y con conne nect cted ed to eith either er CANCAN-B B or or CAN CAN-C -C:: – SRS: Supplemental Restraint System (N2/7) – SBC: Sensotronic Braking Control (A73n1) Control (A73n1) – MCS-L: Multi-Contour Seat-Left (N35/15) Seat-Left (N35/15) – MCS-R: Multi-Contour Seat-Right (N35/16) Seat-Right (N35/16)

Networking N3/10 ECM

CAN- C

Gn Gn/Wh

CANCA N- B

N51/2 ABC

N15/5 ESM

N15/3 ETC

N47-5 ESP

2-wire SBC CAN

A73n1 SBC

      8       1       /       0       3       X

N35/15 MCS-L

N73 EIS

CANCA N- B

N63/1 DTR

A1 ICM

N80 SCM

N69/1 DCM-L

N10/10 SAM-FL

N22 AAC

N72 LCP

N32/1 ESA-L

      5       1       /       0       3       X

X11/4

A35/16 MCS-R

Br  Rd N10/11 SAM-FR

N32/2 ESA-R

N70 OCP

N69/2 DCM-R

N55 SD N2/7 SRS

CANCA N- B

      6       1       /       0       3       X

Br  Bk

D2B N52 RVC

      7       1       /       0       3       X

N10/8 Rear SAM

N62 PTS

N88 TPC

N69/5 KG

N82/1 BNS

A35/8 TeleAid

A2 COMAND

A37 PSE

Configuration of R230 D2B Components •

D2B Master

Head unit (COMAND)

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Component 1

Amplifier (sound system)

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Component 2

CD changer  

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Component 3

E-call 2 (TELEAID)

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Component 4

Telephone

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Component 5

Voice recognition

CAN-C Connector X30/18 Inside driver’s side door sill (next to X30/15) EIS (N73)IC (A1)

X  3  0    /  1 8  

SCM (N80) ECM (N3/10) DTR (N63/1) ABC (N5/12) ESM (N15/5) ETC (N15/3) ESP (N47-5)

SBC (A73n1)

CAN-B Connector X30/15 Inside driver’s side door sill (next to X30/18)

EIS (N73) IC (A1) SCM (N80) DCM-L (N69/1)

X  3  0    /  1 5  

SAM-FL (N10/10) AAC (N22) LCP (N72) ESA-L (N32/1)

MCS-L (N35/15)

CAN-B Connector X30/16 Inside passenger side door sill

SAM-FR (N10/11) OCP (N70)

  1 1 6  /  0   X 3

DCM-R (N69/2) SD (N55) ESA-R (N32/2)

MCS-R (A35/16)

CAN-B Connector X30/17 Behind passenger seat, next to SAM

RVC )N52) SAM-Rear (N10/8) PTS (N62)

  7   1   /   0   X  3

TPC (N88) KG (N69/5) BNS (N82/1) TeleAid (A35/8) COMAND (A2) PSE (A37)

D2B

Systems Diagnosis Control Module (SD)

(N55)

SD Function •

Moni Monito tors rs CANCAN-B B cont contro roll modu module les s dur durin ing g dri drivi ving ng

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Prov Provid ides es DTCs DTCs rel relat ated ed to CAN-B CAN-B comm commun unic icat atio ion n pro probl blem ems s and and for  for  modules which are not communicating properly

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Moni Monito tors rs DTC DTCs s plu plus s inf infor orma mati tion on inpu inputs ts & out outpu puts ts of of CAN CAN-B -B modu module les s

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Dete Determ rmin ines es aff affec ecte ted d func functi tion ons s and and susp suspec ecte ted d comp compon onen ents ts

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Narr Narrow ows s down down the the list list of susp suspec ecte ted d comp compon onen ents ts

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Coul Could d deci decide de tha thatt all all comp compon onen ents ts in in a par parti ticul cular ar ele elect ctri rica call “pat “path” h” category are suspected

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Informs DAS via X11/4: – What might be wrong  – What hat to to che check ck in sequ sequen ence ce  – Requ Reques ests ts com compo pone nent nt act activ ivat atio ion n

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Prov Provid ides es info inform rmat atio ion n on on the the cause cause of an ATA ATA tri trigg gger erin ing g eve event nt

SD Advantages •

Easi Easier er diag diagno nosi sis s of of dif diffi ficul cultt CAN CAN-B -B comp compla lain ints ts in spite spite of  – Complexity of of CA CAN-B  – Increa Increased sed networ networkin king g (shar (sharing ing of comp compone onents nts & wirin wiring) g)

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Can Can be used sed in addi ddition tion to a Short hort Test Test

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Prov Provid ides es 3 typ types es of DTCs DTCs rela relate ted d to to CAN CAN-B -B comm commun unic icat atio ion n pro probl blem ems s  – SD “kno “knowl wled edge ge base base”” defi defici cien enci cies es  – Certain Certain contro controll modul modules es commu communic nicati ating ng in in single single-wi -wire re mode mode  – Any Any CANCAN-B B modu module le no no long longer er com commu muni nica cati ting ng

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All All CAN CAN-B -B modu module le DTCs DTCs are are reg regis iste tere red d and and comp compar ared ed

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Logi Logic c use used d to ide identif ntify y shar shared ed fai failure lures s

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Poss Possib ible le cause causes/r s/rem emed edie ies s are are list listed ed in orde orderr of of lik likel elih ihoo ood d

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Will Will assi assist st in diag diagno nosi sing ng inte interm rmit itte tent nt faul faults ts

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Can erase codes in CAN-B modules

SD Notes •

SD has has no no eff effec ectt on on veh vehic icle le oper operat atio ion n if if dis disco conn nnec ecte ted d

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SD ass assiistan stance ce is lim limit ited ed to CANCAN-B B fau fault lts s

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A DTC DTC must must be prese resent nt befo before re SD can can help help

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SD cann cannot ot diag diagno nose se softw softwar are e prob proble lems ms (err (erron oneo eous us code codes) s) in the the monitored ECUs

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Ther There e is an “onb “onboa oard rd know knowle ledg dge e base base”” with within in SD  – Matche Matched d to the the vehi vehicle cle (cou (countr ntry, y, equip equipmen mentt and functi function) on)  – Matche Matched d to the capabi capabililitie ties s of the CAN-B CAN-B cont control rol module modules s

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SD cann cannot ot effe effecti ctive vely ly diag diagno nose se CANCAN-B B fai failu lure res s if if the the “onb “onboa oard rd knowledge base” is not updated when necessary  – Flas Flashi hing ng of of SD is is requ requir ired ed whe when n SD is is repla replace ced d  – Flashi Flashing ng of of SD may may be requir required ed when when CANCAN-B B modul modules es are are replac replaced ed

Location of N55

One 12-pin connector: + 12 volts (t.30) Chassis ground CAN-B wires K-line to X11/4

Located at right in passenger side footwell To access: Remove glovebox and A-pillar cover in footwell area

Flashing SD with SDS Equipment •

Attach SDS to vehicle and use DAS to complete the following steps: Main groups > Control units > Body > System diagnosis > Program control unit in compliance with factory specifications > don’t change anything in the next screen, “ Knowledge Knowledge base configuration” > F2 > don’t change anything in the next screen, “ Knowledge Knowledge base configuration/special equipment” > F2 Flashing will then occur. Finish by erasing erasing DTCs.

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Reference:  –

NetS NetSta tarr webs websiite: te: Serv Serviice > STAR STAR TekI TekInf nfo o > STAR TAR Bul Bulletin etin Inde Index x > Group 54 > “November 22, 2002, # P-B-54.21/74”

System Diagnosis (SD) In Diagnostic Assistance System, from Main groups menu, select: - Interior diagnosis covering all control units (system diagnosis) or  - Control units > Body > System diagnosis Group:

00.30 & 54.21

Control unit designation:

N55

U.S. Introduction:

MY2003 R230

Major components:

SD control module CAN-B connection to X30/16

MILs:

No

Warning messages in IC?

No

DTC capable?

Yes

Control unit adaptation?

Program “knowledge base” in SD when it is exchanged Update “knowledge base”after replacing any CAN-B module

Requ Requir ires es Con Contro troll unit unit adap adaptat tatio ion n in: in: No othe otherr contr control ol uni unitt

Acronym List – Page 1 AAC

Automatic Air Conditioning

ABC

Active Body Control

BNS

Board Net System (Vehicle Power Supply Control Module)

COMAND

Cockpit Management And Data system

D2B

Digital Data Bus

DCM (L&R)

Door Control Module-Left/Right

DTR

Distronic

ECM

Engine Control Module

EIS

Electronic Ignition Switch

ESA (L/R)

Electric Seat Adjustment-Left/Right

ESM

Electronic Selector Module

ESP

Electronic Stability Program

ETC

Electronic Transmission Control

IC

Instrument Cluster 

Acronym List – Page 2 KG

Keyless Go

LCP

Lower Control Panel

MCS (L/R)

MultiContour Seat-Left/Right

OCP

Overhead Control Panel

PSE

Pneumatic System Equipment

PTS

Parktronic System

RVC

Vario roof 

SAM-FL/FR/Rear Signal Acquisition Module (Front Left/Front Right/Rear) SBC

Sensotronic Brake Control

SCM

Steering Column Module

SD

System Diagnosis

SRS

Supplemental Restraint System

TeleAid

Telematic Identification on Demand

TPC

Tire Pressure Control

UCP

Upper Control Panel

Appendix System diagnosis function

WIS: GF00.30-P-0001R

Remove, insta stall syste stem diagnosis sis control module

WIS: AR54.21-P-0200R

System diagnosis diagnosis control module, location/task/design WIS: GF54.21-P-4119R Tasks of system diagnosis control module

WIS: GF54.21-P-4119-01R

Networking, System diagnosis, D2B, CAN

Introduction of the New SLClass Model Series 230, pp.44-48