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3.Symbol used in illustration
Symbols included in illustrations refer to measurements or procedures. Before diagnosing a problem,
familiarize yourself with each symbol. Refer to "Connector Symbols" in GI Section and "KEY TO SYM-
BOLS SIGNIFYING MEASUREMENTS OR PROCEDURES" below.
4. Action items
Next action for each test group is indicated based on result of each question. Test group number is shown
in the left upper portion of each test group.
HARNESS WIRE COLOR AND CONNECTOR NUMBER INDICATION
There are two types of harness wire color and connector number indication.
TYPE 1: Harness Wire Color and Connector Number are Shown in Illustration
Letter designations next to test meter probe indicate harness
wire color.
Connector numbers in a single circle (e.g. M33) indicate har-
ness connectors.
Connector numbers in a double circle (e.g. F211) indicate com-
ponent connectors. a. Battery voltage
→ 11 - 14V or approximately 12V
b. Voltage : Approximately 0V → Less than 1V
AGI070
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TYPE 2: Harness Wire Color and Connector Number are Shown in Text
KEY TO SYMBOLS SIGNIFYING MEASUREMENTS OR PROCEDURES
SGI144A
SAIA0750E
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SAIA0751E
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How to Read Wiring DiagramsAAS000E2
CONNECTOR SYMBOLS
Most of connector symbols in wiring diagrams are shown from the terminal side.
Connector symbols shown from the terminal side are enclosed
by a single line and followed by the direction mark.
Connector symbols shown from the harness side are enclosed
by a double line and followed by the direction mark.
Certain systems and components, especially those related to
OBD, may use a new style slide-locking type harness connector.
For description and how to disconnect, refer to PG section,
“Description”, “HARNESS CONNECTOR”.
Male and female terminals
Connector guides for male terminals are shown in black and
female terminals in white in wiring diagrams.
SAIA0257E
SGI363
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SAMPLE/WIRING DIAGRAM - EXAMPL -
For detail, refer to following “DESCRIPTION”.
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Optional Splice
DESCRIPTION
SGI942
Num-
ber Item Description
1 Power condition
This shows the condition when the system receives battery positive voltage (can be oper-
ated).
2 Fusible link
The double line shows that this is a fusible link.
The open circle shows current flow in, and the shaded circle shows current flow out.
3 Fusible link/fuse loca-
tion
This shows the location of the fusible link or fuse in the fusible link or fuse box. For arrange-
ment, refer to PG section, POWER SUPPLY ROUTING.
4Fuse
The single line shows that this is a fuse.
The open circle shows current flow in, and the shaded circle shows current flow out.
5 Current rating
This shows the current rating of the fusible link or fuse.
6 Connectors
This shows that connector E3 is female and connector M1 is male.
The G/R wire is located in the 1A terminal of both connectors.
Terminal number with an alphabet (1A, 5B, etc.) indicates that the connector is SMJ connec-
tor. Refer to PG section, SMJ (SUPER MULTIPLE JUNCTION).
7 Optional splice
The open circle shows that the splice is optional depending on vehicle application.
8Splice
The shaded circle shows that the splice is always on the vehicle.
9 Page crossing
This arrow shows that the circuit continues to an adjacent page.
The A will match with the A on the preceding or next page.
10 Common connector
The dotted lines between terminals show that these terminals are part of the same connector.
11 Option abbreviation
This shows that the circuit is optional depending on vehicle application.
12 Relay
This shows an internal representation of the relay. For details, refer to PG section, STAN-
DARDIZED RELAY.
13 Connectors
This shows that the connector is connected to the body or a terminal with bolt or nut.
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14 Wire color
This shows a code for the color of the wire.
B = Black
W = White
R = Red
G = Green
L = Blue
Y = Yellow
LG = Light Green BR = Brown
OR or O = Orange
P = Pink
PU or V (Violet) = Purple
GY or GR = Gray
SB = Sky Blue
CH = Dark Brown
DG = Dark Green
When the wire color is striped, the base color is given first, followed by the stripe color as shown
below:
Example: L/W = Blue with White Stripe
15 Option description
This shows a description of the option abbreviation used on the page.
16 Switch
This shows that continuity exists between terminals 1 and 2 when the switch is in the A posi-
tion. Continuity exists between terminals 1 and 3 when the switch is in the B position.
17 Assembly parts
Connector terminal in component shows that it is a harness incorporated assembly.
18 Cell code
This identifies each page of the wiring diagram by section, system and wiring diagram page
number.
19 Current flow arrow
Arrow indicates electric current flow, especially where the direction of standard flow (vertically
downward or horizontally from left to right) is difficult to follow.
A double arrow “ ” shows that current can flow in either direction depending on cir-
cuit operation.
20 System branch
This shows that the system branches to another system identified by cell code (section and
system).
21 Page crossing
This arrow shows that the circuit continues to another page identified by cell code.
The C will match with the C on another page within the system other than the next or preced-
ing pages.
22 Shielded line
The line enclosed by broken line circle shows shield wire.
23 Component box in
wave line
This shows that another part of the component is also shown on another page (indicated by
wave line) within the system.
24 Component name
This shows the name of a component.
25 Connector number
This shows the connector number.
The letter shows which harness the connector is located in.
Example: M : main harness. For detail and to locate the connector, refer to PG section "Main
Harness", “Harness Layout”. A coordinate grid is included for complex harnesses to aid in
locating connectors.
26 Ground (GND)
The line spliced and grounded under wire color shows that ground line is spliced at the
grounded connector.
27 Ground (GND)
This shows the ground connection. For detailed ground distribution information, refer to
"Ground Distribution" in PG section.
28 Connector views
This area shows the connector faces of the components in the wiring diagram on the page.
29 Common component
Connectors enclosed in broken line show that these connectors belong to the same compo-
nent.
30 Connector color
This shows a code for the color of the connector. For code meaning, refer to wire color codes,
Number 14 of this chart.
31 Fusible link and fuse
box
This shows the arrangement of fusible link(s) and fuse(s), used for connector views of
"POWER SUPPLY ROUTING" in PG section.
The open square shows current flow in, and the shaded square shows current flow out.
32 Reference area
This shows that more information on the Super Multiple Junction (SMJ) and Joint Connectors
(J/C) exists on the PG section. Refer to "Reference Area" for details.
Num-
ber Item Description
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Harness Indication
Letter designations next to test meter probe indicate harness
(connector) wire color.
Connector numbers in a single circle M33 indicate harness con-
nectors.
Component Indication
Connector numbers in a double circle F211 indicate component connectors.
Switch Positions
Switches are shown in wiring diagrams as if the vehicle is in the “normal” condition.
A vehicle is in the “normal” condition when:
ignition switch is “OFF”,
doors, hood and trunk lid/back door are closed,
pedals are not depressed, and
parking brake is released.
AGI070
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