Mitsubishi Lancer Evolution IX. Manual - part 75

HOW TO READ WIRING DIAGRAMS

GENERAL <ELECTRICAL>

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HOW TO READ CONFIGURATION 
DIAGRAMS

M1001006400238

The wiring harness diagrams clearly show the connector locations and harness routings at each site on 
actual vehicles.

AC208446

Denotes connector No.
The same connector No. is used throughout the circuit diagrams to facilitate connector location search.
The first alphabetical symbol indicates the location site of the connector and a number that follows is the unique number.
Numbers are usually assigned to part in clockwise order on the diagram.

       Example: A-19

Number specific to connector (serial number)

Connector location site symbol
A:  Engine compartment
B:  Engine and transmission
C:  Dash panel
D:  Floor and roof 

                                           E:  Door

F:  Trunk 

Denotes earth point.
Same earth number is used throughout circuit
diagrams to facilitate search of earth point.
Refer to GROUP 70 COMPONENT LOCATIONS
- EARTH MOUNTING LOCATIONS
for details of earth points.

Denotes the colour of the tube
(If not specified, it is black).
R:  Red
Y:   Yellow

The number of connector pins and the connector colour
(except milk white)* are shown for ease of retrieval.

       Example: (2-B)

          Connector colour
          (milk white if no colour is indicated)

          Number of connector pins

*: Typical connector colours
        B:  Black

BR: Brown

        Y:   Yellow

V:    Violet

        L:   Blue

O:   Orange

        G:  Green

GR: Grey

        R:  Red

None: Milk white

A-15 (2)             Fog lamp (RH)
A-16 (2-GR)       Horn (LO)
A-17 (2-B)          Headlamp (RH)
A-18 (2-B)          Windshield washer motor
A-19 (2-GR)       Dual pressure switch

Indicates the device to which the
connector is connected.

The mark            shows the
standard mounting position
of wiring harness.

AQ

A-17

A-16

A-15

A-18

A-19

Y

Denotes a section covered by a
corrugated tube.

Front
wiring
harness
(RH)

Denotes harness name.

1

HOW TO READ WIRING DIAGRAMS

GENERAL <ELECTRICAL>

00E-4

HOW TO READ CIRCUIT DIAGRAMS

M1001006500183

The circuit of each system from the fuse (or fusible link) to earth is shown. The power source is shown at the 
top and the earth at the bottom to facilitate understanding of how the current flows. The circuit diagrams show 
the state when switches are not operated.

AC502478

FUSIBLE
LINK

1

RELAY
BOX

HEATER

MOTOR

RELAY

SWITCH

RESISTOR

SENSOR

STARTING
SYSTEM

DIODE

FUSIBLE
LINK

2

ECU

Indicates power source.

Each circuit diagram consists of
block(s). 

Indicates harness junction point
numbers for another system.
The number corresponds to the
junction point number indicated
on another circuit diagram.

Indicates the circuit name to be
connected. The arrow indicates
the current flow direction.

Indicates the power supply in 
the control unit. If no voltage is 
displayed, this indicates battery 
positive voltage.

An "X" at the end of a connector
number indicates that the conn-
ector is connected to a central-
ized junction that is shown in the
section "Centralized Junction."

Indicates the connector symbol.
Connectors in the circuit diagram
are indicated in numerical order.

Indicates connector number.
The same number as used in the
wiring harness diagram.
Connector and connector numbers
are shown at the lower part of the
page.
Connector numbers not enclosed
by frame indicate the device incor-
porated into wiring harness.

Indicates that the diagram contin-
ues at        which belongs to the
       block in the same circuit.        

AB

Indicates that terminal is conne-
cted via a plate in the relay box.

Indicates the operating conditions
of the engine coolant switch, etc.

Indicates shield wire.

One-directional arrow indicates
that current flows upwards.

AC209124

IGNITION
SWITCH (IG1)

RESISTOR

SOLENOID
VALVE
ASSEMBLY

SOLENOID
VALVE 1

SOLENOID
VALVE 2

SENSOR

MOTOR

Indicates that the terminal is a
spare one if the device (sensor
in this case) is not provided.

Indicates representative vehicle 
body earth point. (Same number
as that of earth point in 
EARTHING LOCATION).

Indicates harness junction where
wire diameter or colour changes.

In case two or more connectors
are connected to the same de-
vice, the same connector are
shown by a broken line.

Indicates terminal number.

Indicates that these connectors
are the same intermediate
connectors.

Indicates input/output 
to/from control unit 
(current flow direction).

Input Output

Input/
output

Bi-directional arrow indicates
that current flows in both
directions due to control by an
ECU.

AC

Indicates a wiring connector which is inside 
the equipment and which is not shown in 
the wiring harness configuration diagram. 

Example  C-15-2

Indicates a connector
which is inside the 
equipment, numbered
in order starting from 1.

Indicates the connector number shown in 
the wiring harness configuration diagram. 

Indicates intersections at
which the lead wires are
not connected.

Indicates intersections at
which the lead wires are
connected.

Indicates that the diagram comes
from        which belongs to the
       block in the same circuit.        

HOW TO READ WIRING DIAGRAMS

GENERAL <ELECTRICAL>

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HOW TO READ WIRING DIAGRAMS

GENERAL <ELECTRICAL>

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MARKINGS FOR CONNECTOR AND  
EARTHING

M1001007900162

AC208460

IGNITION
SWITCH (IG1)

FUSIBLE
LINK

1

SOLENOID
VALVE

ECU

INSPECTION
CONNECTOR

SENSOR

MOTOR

AB

3

1

8

7

2

6

4

5