Symbols Used In the Wiring Diagrams

The wiring diagrams are compiled with the following preconditions:
^ Unless otherwise indicated, switches and relays are represented in their inactivated and unenergized state.
^ No key in the ignition
^ Central locking system unlocked
^ Coolant, brake and washer fluids full
^ Gear lever/gear selector in neutral
^ Switches off
^ Parking brake released







Fuses
In the wiring diagrams, every subsystem is generally shown from the relevant fuse in the main fuse box up to the respective component or components and on to the grounding point or direct chassis connection.

To simplify fault diagnosis, a broken line is used in certain instances to signify the power supply.

The power supply to the respective fuse is shown separately in the power supply diagram, in which the main fuse box, ignition switch, etc. are covered.

Example:
If the supply to a fuse comes from the +30 terminal block, the circuit to the fuse in question will be found in the section headed "Power supply +30".

WIS, "Electrical system - Wiring harness - Fuses and relays", shows the components that are connected to the respective fuses.







Grounding Points
Most of the grounding points on the car are designated by a component number consisting of a letter and a number e.g. G14. The locations of the grounding points are given in the section "Grounding points".

In some cases, ground connections are split into a so-called signal ground and a power ground. They are given the additional letter S respective P.
Components with low power consumption and cable screens are grounded to the signal ground connection.

Certain components are grounded directly to the body, e.g. the door switches. These ground connections are indicated by a thicker line than normal connections to the grounding point.

WIS, section "Electrical system - Wiring harness - Grounding points", shows the components that are connected to the respective grounding points.







Switches, Relays And Components
The location of the relays is given in brackets below the component number.
When the box around the component is drawn with a solid line, the whole component is shown.

When the box around the component is drawn with a broken line, only part of the component is shown.

On some components having a hanging lead, the connector has not been given a separate H number to show that it is part of the component.

The components are designated by a serial number and one or more supplementary letters, which indicates their location and type. The location is indicated by capital letters, e.g. 298FL, while the type is indicated by lower case letters, e.g. 47a. The following abbreviations are used to indicate position:
C = Centre
D = Driver's side
F = Front
H = boot lid (Hatch)
P = Passenger side
R = Rear
LH = Left Hand
RH = Right Hand







Sensors And Monitors
The component symbols for sensors and monitors have been simplified. The connector/output of the sensors is given an internal symbol indicating the type of output signal and in the other half, a symbol for the type of quantity is shown.

All internal symbols may be used with other components.
a Sensor output with continuous voltage
b Sensor output with pulse voltage, e.g. frequency or PWM

The outputs are combined with the following quantity symbols to indicate the correct type of sensor:
c Temperature
d Speed/rpm via a toothed wheel or similar
e Level
f Sun
g Load
h Angle
i Acceleration
j Pressure

One type of sensor that can be used for different purposes is:
k Hall sensor

A monitor is shown as a switch with type of quantity:
l Level switch
m Pressure switch







Crimped Connections
To reduce the number of connectors used in the car, several crimped connections are incorporated in the wiring. They occur as fixed wiring connections and also as connectors.

The crimp connectors immediately above the grounding points have been ultrasonic welded for reliability.

The number of terminals in a crimp connection may depend on the market or on the type of car model. In the top of the connector, there is a metallic plate connecting the two input terminals. Since there are no pin numbers given on the connectors, no pin numbers have been shown on the service wiring diagram.

WIS, section Electrical system - Wiring harness - Crimp connections, shows the components that are connected to the respective crimp/crimp connections.