WIS 54.21 Control Units/Modules: Difference between revisions

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==SAM (Signal Acquisition Module)==
==Description - Control Units/Modules==
The W220 has a host of Control Units/Modules also known as Electronic Control Modules (ECM) which communicate digitally with each other via the [[WIS 54.00 General|CAN (Controller Area Network)]] Bus.


A SAM (Signal Acquisition Module) functions much as a network router does on a computer or communications network. It monitors input from various switches, controls, monitoring devices, and warning systems. When you push a button on, for example, your dashboard, the signal goes through a SAM before the device you are controlling responds. If there is something wrong with the device you are trying to operate, you will likely then get a warning, delivered through the SAM to the CAN (Controller Area Network) bus.
Information from CAN C - Engine CAN can be sent to control modules on the CAN B - Interior CAN or vice versa via the Electronic Ignition Switch (EIS). The EIS is the only control module that can transfer the messages and is known as the gateway.


==Fault Error Codes/Diagnostic Trouble Codes (DTC)==
All the Control Units/Modules are connected in a parallel circuit via a two wire, bi-directional communication link (the Bus) with data transmitted according to priority.
===DTC Structure===


http://w220.ee/images/e/e5/Fault_Error_Codes_or_Diagnostic_Trouble_Codes_Structure.JPG
The Control Units/Modules have been designed with in-built monitoring functions which whenever parameters exceed acceptable limits will produce Warning Messages on the Instrument Cluster and store relevant Fault Error Codes or Diagnostic Trouble Codes (DTC) in the vehicle memory. These DTC may be monitored using the [[http://w220.ee/STAR_Diagnosis_System_(SDS)_or_Diagnosis_Assistance_System_(DAS) STAR]] Diagnosis System (SDS). In addition to On-Board Diagnosis (OBD) STAR can perform comprehensive system diagnosis on all vehicle systems via the Control Units/Modules for engine control, suspension, audio systems, climate control etc.


===DTC Example===
==Types of Control Units/Modules:==
* CCM Multi-function Control Module
* DAM (FBM) Drive Authorization Module
* DCM Door Control Module
* EIS (EZS) Electronic Ignition Switch Control Module
* ESCM (MAS) Engine Systems Control Module
* ESM (EWM) Electronic Selector Lever Module
* GRM (GEM) Gear Recognition Module
* SAM Signal Acquisition / Actuation Module
* SCM (MRM) Steering Column Module
* SIM Subscriber Identification Module
* SVCM (MSS) Special Vehicle Multi-function Control Module


'''P0420 Catalyst System Efficiency Below Threshold (Bank 1)'''
==Location Diagram - Control Units/Modules==
* 1st digit: (P) Indicates which system reported the fault.
http://w220.ee/images/1/1e/W220_Control_Module_Location_Diagram.JPG
** B = Body,
** C = Chassis,
** P = Powertrain,
** U = Network eg CAN
* 2nd digit (0) Indicated type of fault code.
** 0 = Standardized eg OBD Code
** 1 = Manufacturer Code
* 3rd digit (4) Indicated the assembly where the fault occurred.
** 1 = Fuel and airflow monitoring
** 2 = Injection nozzles
** 3 = Ignition system and combustion misfiring
** 4 = Additional systems for emissions reduction
** 5 = Idle and vehicle speed
** 6 = Onboard computer and other outputs
** 7 = Transmission
** 8 = Transmission
* 4th digit (20) Indicated faulty component and type of fault.


===List of DTC===
Reference: http://www.benzworld.org/forums/w220-s-class/1573152-esp-module-where.html


Downloadable pdf files.
==DCM [[Door Control Module]]==


http://www.benzworld.org/forums/w220-s-class/1639927-guide-mercedes-benz-vehicle-data-card.html
==EIS (EZS) Electronic Ignition Switch Control Module==
Refer to [[WIS 80.57 Drive Authorization System]]
 
==ESCM (MAS) Engine Systems Control Module==
TBA
 
==[[SAM (Signal Acquisition / Actuation Module)]]==
 
==SCM (MRM) Steering Column Module==
TBA
 
==Codes==
===Fault Error Codes/Diagnostic Trouble Codes (DTC)===
A list of the Mercedes-Benz Fault Error Codes/Diagnostic Trouble Codes (DTC) for 1996+ models is here [[M-B Fault Error Codes/Diagnostic Trouble Codes (DTC)]]
 
===Vehicle Data Card or SA Codes===
The Vehicle Data Card is a small card that lists important information such as the options fitted, serial numbers, delivery dates, key codes to cut new keys etc. See here [[Data Card]]
 
===Automatic Climate Control Hidden Menu Codes===
To access/review/read and clear/reset Fault/Error Diagnostic Trouble Codes (DTC) associated with the ACC see here [[Automatic Climate Control (ACC) Service Menus]]
 
===COMAND Codes===
To see information about COMAND Codes see here [[WIS 82.85 Navigation and Communication System (CNS, ICS, COMAND, FleetBoa) A40/3]]

Latest revision as of 06:06, 28 March 2016

Description - Control Units/Modules

The W220 has a host of Control Units/Modules also known as Electronic Control Modules (ECM) which communicate digitally with each other via the CAN (Controller Area Network) Bus.

Information from CAN C - Engine CAN can be sent to control modules on the CAN B - Interior CAN or vice versa via the Electronic Ignition Switch (EIS). The EIS is the only control module that can transfer the messages and is known as the gateway.

All the Control Units/Modules are connected in a parallel circuit via a two wire, bi-directional communication link (the Bus) with data transmitted according to priority.

The Control Units/Modules have been designed with in-built monitoring functions which whenever parameters exceed acceptable limits will produce Warning Messages on the Instrument Cluster and store relevant Fault Error Codes or Diagnostic Trouble Codes (DTC) in the vehicle memory. These DTC may be monitored using the [STAR] Diagnosis System (SDS). In addition to On-Board Diagnosis (OBD) STAR can perform comprehensive system diagnosis on all vehicle systems via the Control Units/Modules for engine control, suspension, audio systems, climate control etc.

Types of Control Units/Modules:

  • CCM Multi-function Control Module
  • DAM (FBM) Drive Authorization Module
  • DCM Door Control Module
  • EIS (EZS) Electronic Ignition Switch Control Module
  • ESCM (MAS) Engine Systems Control Module
  • ESM (EWM) Electronic Selector Lever Module
  • GRM (GEM) Gear Recognition Module
  • SAM Signal Acquisition / Actuation Module
  • SCM (MRM) Steering Column Module
  • SIM Subscriber Identification Module
  • SVCM (MSS) Special Vehicle Multi-function Control Module

Location Diagram - Control Units/Modules

W220_Control_Module_Location_Diagram.JPG

Reference: http://www.benzworld.org/forums/w220-s-class/1573152-esp-module-where.html

DCM Door Control Module

EIS (EZS) Electronic Ignition Switch Control Module

Refer to WIS 80.57 Drive Authorization System

ESCM (MAS) Engine Systems Control Module

TBA

SAM (Signal Acquisition / Actuation Module)

SCM (MRM) Steering Column Module

TBA

Codes

Fault Error Codes/Diagnostic Trouble Codes (DTC)

A list of the Mercedes-Benz Fault Error Codes/Diagnostic Trouble Codes (DTC) for 1996+ models is here M-B Fault Error Codes/Diagnostic Trouble Codes (DTC)

Vehicle Data Card or SA Codes

The Vehicle Data Card is a small card that lists important information such as the options fitted, serial numbers, delivery dates, key codes to cut new keys etc. See here Data Card

Automatic Climate Control Hidden Menu Codes

To access/review/read and clear/reset Fault/Error Diagnostic Trouble Codes (DTC) associated with the ACC see here Automatic Climate Control (ACC) Service Menus

COMAND Codes

To see information about COMAND Codes see here WIS 82.85 Navigation and Communication System (CNS, ICS, COMAND, FleetBoa) A40/3

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