LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Infiniti >> 2018 >> QX80 AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 255 (Security Control System (Diagnostics)) >> Component Parts/Circuit Diagnosis >> Horn Function >> Component Function Check
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Component Function Check

WARNING: This page is about a different car, the 2020 Infiniti QX80. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK FUNCTION 1 
    1. Disconnect vehicle security horn relay.
    2. Perform "VEHICLE SECURITY HORN" in "ACTIVE TEST" mode of "THEFT ALM" of "BCM" using CONSULT.
    3. Check the horn operation.

      Test item

      Description

      VEHICLE SECURITY HORN

      ON

      Horn

      Sounds (for 0.5 sec)

    Is the operation normal?

    YES

    GO TO 2.

    NO

    Refer to Diagnosis Procedure .

  2. CHECK FUNCTION 2 
    1. Reconnect vehicle security horn relay.
    2. Disconnect horn relay.
    3. Perform "VEHICLE SECURITY HORN" in "ACTIVE TEST" mode of "THEFT ALM" of "BCM" using CONSULT.
    4. Check the horn operation.

      Test item

      Description

      VEHICLE SECURITY HORN

      ON

      Vehicle security horn

      Sounds (for 0.5 sec)

    Is the operation normal?

    YES

    INSPECTION END

    NO

    Refer to Diagnosis Procedure .