HOW TO READ WIRING DIAGRAMS

Connector Symbols
Sample/Wiring Diagram -Example-
Description

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.

Sample/Wiring Diagram -Example-

For detail, refer to following Description.

Description

Number	Item	Description
1	Power supply	This means the power supply of fusible link or fuse.
2	Fusible link	“X” means the fusible link.
3	Number of fusible link/fuse	This means the number of fusible link or fuse location.
4	Fuse	“/” means the fuse.
5	Current rating of fusible link/fuse	This means the current rating of the fusible link or fuse.
6	Optional splice	The open circle shows that the splice is optional depending on vehicle application.
7	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 How To Read Harness Layout, Main Harness.
8	Splice	The shaded circle “” means the splice.
9	Page crossing	This circuit continues to an adjacent page.
10	Option abbreviation	This means the vehicle specifications which layouts the circuit between “”.
11	Relay	This shows an internal representation of the relay.
12	Option description	This shows a description of the option abbreviation used on the page.
13	Switch	This shows that continuity exists between terminals 1 and 2 when the switch is in the A position. Continuity exists between terminals 1 and 3 when the switch is in the B position.
14	Circuit (Wiring)	This means the wiring.
15	System branch	This shows that the circuit is branched to other systems.
16	Shielded line	The line enclosed by broken line circle shows shield wire.
17	Component name	This shows the name of a component.
18	Ground (GND)	This shows the ground connection.
19	Connector	This means the connector information. This unit-side is described by the connector symbols.
20	Connectors	This means that a transmission line bypasses two connectors or more.
21	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
22	Terminal number	This means the terminal number of a connector.

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.

MULTIPLE SWITCH

The continuity of multiple switch is described in two ways as shown below.

The switch chart is used in schematic diagrams.
The switch diagram is used in wiring diagrams.