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Home >> Nissan-Datsun >> 2015 >> Altima Base >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Drivers Assistance Systems - ADAS >> Driver Assistance System - Intelligent Technology Suite (Its) Control Unit And Lane Departure Warning (LDW) >> Its Control Unit >> DTC/Circuit Diagnosis >> Warning Systems Switch Circuit >> Diagnosis Procedure
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Diagnosis Procedure

Regarding Wiring Diagram information, refer to WIRING DIAGRAM .

  1. CHECK WARNING SYSTEMS SWITCH SIGNAL INPUT

    1. Turn the ignition switch ON.
    2. Check voltage between ITS control unit harness connector and ground.
    Terminals Condition Voltage
    (Approx.)
    (+) (-)
    ITS control unit Ground Warning systems switch
    Connector Terminal
    M58 32 Pressed 0 V
    Released 12 V

    Is the inspection result normal?

    YES 

    Replace the ITS control unit. Refer to REMOVAL AND INSTALLATION .

    NO 

    GO TO STEP 2  .

  2. CHECK WARNING SYSTEMS SWITCH

    1. Turn ignition switch OFF.
    2. Remove warning systems switch.
    3. Check warning systems switch. Refer to COMPONENT INSPECTION .

    Is the inspection result normal?

    YES 

    GO TO STEP 3  .

    NO 

    Replace the warning systems switch. Refer to REMOVAL AND INSTALLATION .

  3. CHECK WARNING SYSTEMS SWITCH GROUND CIRCUIT

    Check continuity between warning system switch harness connector terminal and ground.

    Warning system switch Ground Continuity
    Connector Terminal
    M62 8 Yes

    Is the inspection result normal?

    YES 

    GO TO STEP 4  .

    NO 

    Repair harness or connector.

  4. CHECK WARNING SYSTEMS SWITCH SIGNAL INPUT CIRCUIT FOR OPEN

    1. Disconnect the ITS control unit connector.
    2. Check continuity between the ITS control unit harness connector and warning system switch harness connector.
      ITS control unit Warning system switch Continuity
      Connector Terminal Connector Terminal
      M58 32 M62 6 Yes

    Is the inspection result normal?

    YES 

    GO TO STEP 5  .

    NO 

    Repair the harnesses or connectors.

  5. CHECK WARNING SYSTEMS SWITCH SIGNAL INPUT CIRCUIT FOR SHORT

    Check continuity between the ITS control unit harness connector and ground.

    ITS control unit Ground Continuity
    Connector Terminal
    M58 32 No

    Is the inspection result normal?

    YES 

    Replace the ITS control unit. Refer to REMOVAL AND INSTALLATION .

    NO 

    Repair the harnesses or connectors.

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