wiring diagram MITSUBISHI MONTERO 2003 Service Repair Manual

ACX01846
A-16 Y A-17 A-18A-19
Denotes connector No.
The same connector No. is used throughout the circuit diagrams to facilitate connector location searches.
The first alphabetical symbol indicates the location site of the connector and a number that follows is the unique number.
Numbers are assigned to parts in clockwise order on the diagram.
Example: A-19
Number specific to connector (serial number)
Connector location site symbol
A: ENGINE COMPARTMENT F: FRONT FLOOR AND ROOF
B: ENGINE G: REAR FLOOR AND UNDER FLOOR
C: TRANSMISSION H: DOOR
D: DASH PANEL I: BACK DOOR
E: FLOOR CONSOLE
Denotes ground point.
Same ground number is used throughout circuit
diagrams to facilitate search of ground point.
Refer to GROUP 70 SINGLE PART INSTALLATION
POSITION - GROUND MOUNTING LOCATIONS
for details of ground points.
Denotes a section covered by a
corrugated tube.
Denotes the color of the corrugated
tube (If not specified, it is black.)
R: Red
Y: Yellow
The number of connector pins and the connector color
(except milk white)* are shown for ease of retrieval.
Example: (2-B)
Connector color
(milk white if no color is indicated)
Number of connector pins
*: Typical connector colors
B: Black BR: Brown
Y: Yellow V: Violet
L: Blue O: Orange
G: Green GR: Gray
R: Red NONE: Milk white
A-16 (1) HORN (LOW)
A-17 (3-GR) HEADLIGHT (LOW:RH)
A-18 (2-B) HEADLIGHT (HIGH:RH)
A-19 (2) DUAL PRESSURE SWITCH
Indicates the device to which the
connector is connected.
The mark shows the
standard mounting position
of wiring harness.
AF
Denotes harness name.FRONT
WIRING
HARNESS

AC106603
Indicates power source.
Indicates that terminal is conne-
cted via a plate in the relay box.
Each circuit diagram consists of
block(s). The blocks are divided
by page number.
Indicates splice point numbers.
These numbers are identical to
those described in "Splice Loca-
tions."
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 the operating conditions
of the engine coolant switch, etc.
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 the circuit mame
to be connected. The arrow
indicatesthe current flow
direction.
Indicates that the diagram contin-
ues at which belongs to the
block in the same circuit.
AB
Indicates shield wire.Indicates that current
flows upwards.

AC106604
Indicates that the terminal is a
spare one if the device (sensor
in this case) is not provided.
Indicates representative vehicle
body ground point. (Same
number as that of ground point in
GROUNDING LOCATION).
Indicates harness junction where
wire diameter or color changes.
In case two or more connectors
are connected to the same de-
vice, markings indicating the
same connector are connected
by a broken line.
Indicates terminal number.
A broken line indicates that these
connectors are the same interm-
ediate connectors.
Indicates intersections at
which the lead wires are
not connected.
Indicates intersections at
which the lead wires are
connected.
Indicates input/output
to/from control unit
(current flow direction).
InputOutputInput/
output
Indicates current flow downward
or upward as controlled by the
control unit.
AB
Indicates that the diagram comes
from which belongs to the
block in the same circuit.
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.

ACX00915
3Checking of Parts Associated with
Probable Causes and Determination
of Faulty Parts 2
Determination of Probable Causes
4Repair and Confirmation
Observe the symptom carefully. Check if there are also
other problems.
In determining the probable causes, it is necessary to
study the wiring diagram to understand the circuit as a
system. Knowledge of switches, relays and other parts is
necessary for accurate analysis. The causes of similar
problems in the past must be taken into account.
Troubleshooting is carried out by making step-by-step
checks until the cause is found.
After the problems are corrected, be sure to check that the
system operates correctly. Also check that new problems
have not been caused by the repair.
AC
1
Observation of Problem Symptoms