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How to Read Wiring Diagrams: Description: Notes

WARNING: This page is about a different car, the 2008 Infiniti FX45 and 2008 Infiniti FX35. However, it is still accessible from the selected car via links, so may be relevant.
ITEM DESCRIPTION CHART

Number Item Description
1 Power condition
  • This shows the condition when the system receives battery positive voltage (can be operated).
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 location
  • This shows the location of the fusible link or fuse in the fusible link or fuse box. For arrangement, refer to POWER SUPPLY ROUTING .
4 Fuse
  • 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 connector. Refer to POWER SUPPLY, GROUND & CIRCUIT ELEMENTS .
7 Optional splice
  • The open circle shows that the splice is optional depending on vehicle application.
8 Splice
  • 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 part.
  • The A will match with the A on the preceding or next figure.
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 , STANDARDIZED RELAY .
13 Connectors
  • This shows that the connector is connected to the body or a terminal with bolt or nut.
14 Wire color
  • This shows a code for the color of the wire.
B = Black BR = Brown
W = White OR or O = Orange
R = Red P = Pink
G = Green PU or V (Violet) = Purple
L = Blue GY or GR = Gray
Y = Yellow SB = Sky Blue
LG = Light Green 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 figure.
16 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.
17 Assembly parts
  • Connector terminal in component shows that it is a harness incorporated assembly.
18 Cell code
  • This identifies each part of the wiring diagram by information, system and wiring diagram part 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 circuit 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 part identified by cell code.
  • The C will match with the C on another part within the system other than the next or preceding figure.
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 part (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 "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 ".
28 Connector views
  • This area shows the connector faces of the components in the wiring diagram on the figure.
29 Common component
  • Connectors enclosed in broken line show that these connectors belong to the same component.
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 ".

    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.
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