Use of electric wiring diagrams - OV00.01-U-1901-03SAA

Model 221 

Wiring diagrams 

• The wiring diagrams are assigned to the familiar function groups 00-91. The systems are listed alphabetically with an indication of the function group/function subgroup in the "Search aid for all wiring diagram groups"

  OV00.01-U-1901SAA  or A3 (paper version) to facilitate finding individual wiring diagrams.

• The wiring diagrams are filed in the respective function group arranged according to the PE number,

  e.g.: PE07.61-U-2101SAC

  PE07.61-U-2101SAD

  To check the completeness of the volume the sequence of the wiring diagrams filed can be seen from the lists of contents of the respective function group. For supplements the wiring diagrams should be filed as per the supplement sheet.

  e.g.: PE07.00-U-1100SAA Overview of wiring diagrams....

• The wiring diagrams are generated as function diagrams, control unit diagrams or detailed function diagrams and are structured as follows:
  • Function diagrams

    The control units and electrical components required for the function are shown as symbols. The functional connections are realized by direct lines or by the data bus.

  • Control unit diagrams

    Control units that only fulfill one function, e.g. Parktronic, are shown complete with all connected components.

    If control units fulfill several functions, e.g. ME-SFI [ME] control unit or SAM control unit, the control unit diagram includes a reference to a detailed function diagram. The abbreviations of the components are given in addition to this reference.

    The relay wiring is also shown on the detailed function diagrams.

  • Detailed function diagrams

    If components form an independent function as per the overview of the function groups (e.g. windshield wipers), the components are shown on a detailed function diagram.

  The wiring diagrams also contain linkages of possible versions and functions. Linkages, recognizable as versions, are framed and provided with an abbreviated designation/abbreviation. Versions are designated with 1 and 2 in the case of a phased-in modification.

• The versions identified with the abbreviated designation "U..." are listed in the legends. Explanations regarding identifications of versions with abbreviations such as ESP can be found in the section "Abbreviations for Workshop Literature".

  OV00.01-U-1001-27A *(A4)

  The signal and circuit designations used are explained in "Abbreviations of signal and circuit designations for wiring diagrams" OV00.01-U-1001-28SAA  *(A5).

• Wire cross-sections may differ from that shown in the wiring diagrams.

Wiring diagram number 

Function diagram 

Wire identification 

Fuse blocks 

Components and switches 

Wire colors: 

BK = black = black

BN = brown = brown

BU = blue = blue

GN = green = green

GY = gray = gray

OG = orange = orange

PK = pink = pink

RD = red = red

TR = transparent = transparent

VT = violet = violet

WH = white = white

YE = yellow = yellow

FW = Flat wire = Flat wire

The symbol refers to further wiring diagrams or function diagrams.

• Special features in WIS presentation

  In contrast to the presentation on paper, it is possible in the WIS to select certain areas (framed in red) and thus to jump to other documents or wiring diagrams.

  • Selection of connectors → Document: Location and assignment of connectors
  • Selection of ground points → Document: Location and assignment of ground points
  • Selection of Z connector sleeves → Document: Location and assignment of Z connector sleeves
  • Selection of wiring diag. hands → Reference to further wiring diagrams
• The feed-in of the Z-connector sleeves is shown as follows by an arrow to the left, the outputs with arrows to the right:

  ← G2 Battery + 

  → N3/10 Control unit ME-SFI F.5

• The assignment of the ground points is illustrated using an arrow pointing to the right as follows:

  → N3/10 ME-SFI [ME] control unit F.2

  • Selection of Component designations → document: Abbreviations of signal and terminal designations
• The assignment of connectors is shown as follows by the cable color at the pin and socket:

  WHBK 1 WHBK

CAN bus representation 

LIN bus representation 

MOST bus representation