Introduction - Function and Constitution of Codes

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Introduction

  1. Breakdown of the Function into three Diagrams:
    • The Schematic or Principle Diagram.
    • The Wiring Diagram
    • The Installation Diagram
  2. Constitution of the Diagrams
    Schematic or Principle Diagram
    • supplies ( + and -)
    • components (with references, function symbols and internal electro-*#*mechanical details, except for electronics)
    • connector sockets on components
    • earth points
    • wire lines (with reference)
    Wiring Diagram
    • supplies (+ and -)
    • components (with references, function symbols, without internal electro-mechanical details)
    • interconnections (connectors with references)
    • earth points (with reference)
    • splices (with reference)
    • harnesses (with reference)
    • wire references
    Installation Diagram
    • total or partial ghosted view of the vehicle (in perspective)
    • components (position, reference)
    • interconnections (position, reference)
    • splices (position, reference)
    • earth points (position, reference)
    • harness (reference, run)
    • partition passages
  3. Coding of Functions
    The principle of this numbering is to attach the component number to an electrical function.
    The functions are grouped in 8 families.
    Power Unit:
    • 10 - starting, current generation
    • 11 - ignition system, pre-heating
    • 12-13 - fuel system, fuel injection
    • 14 - engine diagnostics
    • 15 - cooling system
    • 16 - gearbox, drive shafts
    • 17 - engine electrical supply - accumulator
    Exterior lighting and signalling
    • 20 - rear fog lamps
    • 21 - stop lamps
    • 22 - reversing lamps
    • 23 - direction indicator, side repeater flashers, hazard warnings
    • 24 - running lights, headlamp dim-dip (DIM-DIPS)
    • 25 - horns
    • 26 - headlamps, tail lamps, number plate lamps, side lamps and indicator lamps
    Interior Lighting
    • 30 - passenger compartment lighting
    • 31 - closed compartment lighting
    Driver Information
    • 40 - engine coolant and other water information, current generation
    • 41 - engine oil information
    • 42 - engine speed and engine air information
    • 43 - fuel and pre-heating information
    • 44 - brake information
    • 45 - suspension information
    • 46 - gearbox and transmission information
    • 47 - audible warning information
    • 48 - engine check information
    • 49 - doors etc. information
    Wipe-Wash
    • 50 - windscreen wipers
    • 51 - windscreen wash
    • 52 - rear screen wiper
    • 53 - rear screen wash
    • 54-55 - headlamp wipe-wash, headlamp wash
    Assistance mechanisms
    • 60 - electric front windows
    • 61 - electric rear windows
    • 62 - central locking
    • 63 - electrically controlled seats
    • 64 to 6469 - electrically controlled mirrors
    • 6470 to 6499 - steering column
    • 65 - passive seat belts
    • 66 - headlamp height correction
    • 67 - gearbox and transmission assistance
    • 68 - sun roof, rear quarters
    Driver aids
    • 70 - brakes
    • 71 - variable power steering
    • 72 - trip computer, clock
    • 73 - cruise control
    • 74 - ice warning
    • 75 - proximity detection
    • 76 - under inflation detection
    • 77 - suspension
    Driving comfort
    • 80 - heating/ventilation, air conditioning
    • 81 - heating equipment (heated rear screen, glass and mirrors, glass, lighter)
    • 82 - coded anti-start
    • 83 - heated seats
    • 84 - radio, aerial, radio telephone
    • 85 - ice warning
    • 86 - anti-theft alarm system
    • 87 - electrically controlled blind
  4. Component Coding
    Components have a four figure number e.g.: 4310.
    The first two figures indicate the function, the two following figures identify the component.
    The numbers for indicator lamps are preceded by the letter V e.g.: V2610.
    Special numbering of equipment which supplies an electrical feed
    • BB00: battery
    • BB10: battery + ve unit
    • CA00: ignition switch
    • BF00: fuse box
    Free connectors which have a particular function (e.g. testing a function) are numbered as components with the letter С in front e.g.: C1300.
    Numbering of earth points
    • the letter M is used followed by an identifying number
    • examples: M2A, M90C
    Splice Numbering
    • the letter E is used followed by an identifying number
    • examples: E028, E002
    • application of an alphabetical index if the splices are identical, e.g.: E005A, E005B
  5. Interconnection Numbering
    The letters IС are used followed by a 2-digit identifying number. Application of an alphabetical index if the interconnections are identical, e.g.: IC20, IC05A, IC05B.
  6. Numbering of Bridge Block Connectors
    The letter В is used, followed by a 3 figure number, e.g.: B001. Application of an alphabetical index if terminals are identical e.g.: В00ЗА, В00ЗВ.
  7. Wire Coding
    This code enables linking of the wire number to the type of supply or the electrical function. Supply is broken down as follows.
    Supply before a fuse
    • BB: battery + ve supply
    • AA: accessory + ve supply
    • CC: ignition controlled + ve supply
    • W: sidelamp + ve supply
    • KK: + ve supply after ignition switched off
    Example: B02A (type of supply+ fuse number+ wire identification number, figure or letter).
    Specific Supplies
    • M: earth
    • D: screening
    Example: M262 (type of supply+ wire identification number, figure or letter).
    Comments: each vehicle has special features in the coding of the wires concerning the supplies (they are handled as variants).
  8. Abbreviations
    These abbreviations are quoted on the terminals of certain components (e.g. ignition switch).
    + BB: battery + ve.
    + AA: accessory + ve.
    + CC: ignition controlled + ve.
    + KK: + ve after ignition off.
  9. Colour Codes
    BA: white.
    BE: blue.
    BG: beige.
    GR: gray.
    JN: yellow.
    MR: brown.
    NR: black.
    OR: orange.
    RG: red.
    RS: pink.
    VE: green.
    VI: mauve.
    VJ: green/yellow.
  10. Reading The Schematic Diagrams
    Diag Fig1.jpg
    A: representation of an earth point.
    В: component number.
    С: wire number.
    D: connector socket number.
    E: connector colour.
    F: connector socket number.
    G: fuse number.
    H: representation of information going to another function.
    I: number of the function involved.
    J: representation of a wire depending on vehicle specification.
    К: component diagram.
    L: uniting wires.
    M: representation of a splice.
  11. Reading Wiring Diagrams
    Diag Fig2.jpg
    N: harness identification.
    O: fuse box diagram.
    P: interconnection number.
    Q: number of interconnection ways.
    R: interconnection colour.
    S: representation of a partial interconnection.
    T: representation of a splice.
  12. Reading Installation Diagrams
    Diag Fig2.jpg
    1: identifying the harness shown.
    2: identifying the equipment.
    3: number of connector ways.
    4: connector colour.
    5: representation of an earth point.
    6: representation of a splice.
    7: identifying an interconnection.
    8: identifying the harness connected.
    9: for details see the box indicated.
    10: location of the harness label.