Nissan Altima 2007-2012 Service Manual: How to read wiring diagrams

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


• 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-


Sample/wiring diagram -example-

• For detail, refer to following GI-11, "Description".

Description


Description

SWITCH POSITIONS


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


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.

Abbreviations


    How to follow trouble diagnoses
    Description NOTICE: Trouble diagnoses indicate work procedures required to diagnose problems effectively. Observe the following instructions before diagnosing. • Before performing troubl ...

    Abbreviations
    Abbreviation List The following ABBREVIATIONS are used: ...

    Other materials:

    Precaution
    Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT PRE-TENSIONER" The Supplemental Restraint System such as “AIR BAG” and “SEAT BELT PRE-TENSIONER”, used along with a front seat belt, helps to reduce the risk or severity of injury to the driv ...

    Front coil spring and strut
    Removal and Installation REMOVAL 1. Remove wheel and tire. Refer to WT-66, "Adjustment". 2. Remove brake caliper and reposition aside using wire. Refer to BR-30, "BRAKE CALIPER ASSEMBLY : Exploded View". CAUTION: Avoid depressing brake pedal with brake caliper removed ...

    Horn
    Description Horn (high/low) is located inside of front bumper and operates when theft warning system is in alarm phase. Component Function Check 1.CHECK FUNCTION 1. Select HORN in “ACTIVE TEST” mode with CONSULT-III. 2. Check the horn (high/low) operation. Is the operation nor ...