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Home >> Infiniti >> 2017 >> QX80 Base, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 58 (Driver Assistance System - Lane Departure Warning & Lane Departure Prevention (LDW & LDP) (DTC/Circuit Diagnosis)) >> DTC/Circuit Diagnosis >> Lane Departure Warning Buzzer Circuit >> Diagnosis Procedure

Diagnosis Procedure

WARNING: This page is about a different car, the 2016 Infiniti QX50. However, it is still accessible from the selected car via links, so may be relevant.

  1. CHECK LANE DEPARTURE WARNING BUZZER POWER SUPPLY CIRCUIT

    1. Turn ignition switch OFF.
    2. Disconnect the lane departure warning buzzer connector.
    3. Turn ignition switch ON.
    4. Check voltage between the lane departure warning buzzer harness connector and ground.
      Terminals Voltage
      (Approx.)
      (+) (-)
      Lane departure warning buzzer Ground
      Connector Terminal
      M45 1 Battery voltage

    Is the measurement value normal?

    YES 

    GO TO STEP 2  .

    NO 

    Check harness between fuse and lane departure warning buzzer.

  2. CHECK LANE DEPARTURE WARNING BUZZER GROUND CIRCUIT

    1. Turn ignition switch OFF.
    2. Check continuity between lane departure warning buzzer harness connector and ground.
    Lane departure warning buzzer Ground Continuity
    Connector Terminal
    M45 3 Existed

    Does continuity exist?

    YES 

    GO TO STEP 3  .

    NO 

    Repair the harnesses or connectors.

  3. CHECK LANE DEPARTURE WARNING BUZZER SIGNAL CIRCUIT FOR OPEN

    1. Disconnect the lane camera unit connector.
    2. Check continuity between the lane camera unit harness connector and lane departure warning buzzer harness connector.
      Lane camera unit Lane departure warning buzzer Continuity
      Connector Terminal Connector Terminal
      R10 6 M45 2 Existed

    Does continuity exist?

    YES 

    GO TO STEP 4  .

    NO 

    Repair the harnesses or connectors.

  4. CHECK LANE DEPARTURE WARNING BUZZER SIGNAL CIRCUIT FOR SHORT

    Check continuity between the lane camera unit harness connector and ground.

    Lane camera unit Ground Continuity
    Connector Terminal
    R10 6 Not existed

    Does continuity exist?

    YES 

    Repair the harnesses or connectors.

    NO 

    GO TO STEP 5  .

  5. CHECK LANE DEPARTURE WARNING BUZZER OPERATION

    1. Connect lane departure warning buzzer connector.
    2. Turn ignition switch ON.
    3. Apply ground to lane departure warning buzzer terminal 2.
    4. Check condition of the lane departure warning buzzer.

    Does lane departure warning buzzer sound?

    YES 

    Replace the lane camera unit.

    NO 

    Replace lane departure warning buzzer.

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