Citytrac 4200
Citymaster 1200
Citycleaner
Service Documents
For internal use only
Status
March 2009
Page
77 of 108
6.2 Basic principles, electrical engineering circuit diagram (terminal plan/wiring diagram)
Circuit and wiring plans are always comprised of the drawings and reference lists.
The reference lists always contain all the machine components.
The letter assignment is organised as follows:
- A
electronics, control units
- B
sensors, transducers
- C
capacitors
- E
headlights, lighting, indicators
- F
fuses
- G
batteries, generators
- H
control lamps
- K
relays
- M
starter, electric motors, stroke elements, pumps
- R
resistors, potentiometers, glow plugs
- S
switches, buttons
- V
diodes
- X
connectors, potential distributor
- Y
valves, solenoid valves, proportional solenoid valves, magnetic clutches
Every component is identified by a letter and chronological number, e.g.: M1 relates to a starter, M2 a pump, M3 an electric motor, etc.
Plugs and connectors on electronic components are identified by A1; X1 or A1;X2.
Plugs and connectors with several pins are identified by A1; X1:1 or A1; X1:2 etc..
Connectors or potential distributors which are not located on an electronics component are only identified by X1, X2 etc.
