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Home >> Nissan-Datsun >> 2004 >> Altima S, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 1031 (Door & Lock) >> Component Diagnosis >> Intelligent Key Warning Buzzer >> Diagnosis Procedure

Diagnosis Procedure

WARNING: This page is about a different car, the 2009 Nissan Maxima. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK INTELLIGENT KEY WARNING BUZZER

    Check voltage between BCM connector and ground.

    VOLTAGE SPECIFICATION

    Terminals Warning buzzer operation condition Voltage (V) (Approx.)
    (+) (-)
    BCM connector Terminal
    M21 144 Ground ON 0
    OFF Battery voltage
    Fig 1: Checking Voltage Between BCM Connector And Ground
    G05046452Courtesy of NISSAN MOTOR CO., U.S.A.

    Is the inspection result normal? 

    YES: GO TO  5

    NO: GO TO 2

  2. CHECK INTELLIGENT KEY WARNING BUZZER POWER SUPPLY CIRCUIT
    1. Turn ignition switch OFF.
    2. Disconnect Intelligent Key warning buzzer connector.
    3. Check voltage between Intelligent Key warning buzzer connector and ground.
      VOLTAGE SPECIFICATION

      Terminals Voltage (V) (Approx.)
      (+) (-)
      Intelligent Key warning buzzer connector Terminal
      E28 1 Ground Battery voltage
      Fig 2: Checking Voltage Between Intelligent Key Warning Buzzer Connector And Ground
      G04916839Courtesy of NISSAN MOTOR CO., U.S.A.

      Is the inspection result normal? 

      YES: GO TO 3

      NO: Repair or replace Intelligent Key warning buzzer power supply circuit.

  3. CHECK INTELLIGENT KEY WARNING BUZZER CIRCUIT
    1. Disconnect BCM connector.
    2. Check continuity between BCM connector and Intelligent Key warning buzzer connector.
      CONTINUITY CHART

      A: BCM connector Terminal Intelligent Key warning buzzer connector Terminal Continuity
      M21 144 B: E28 3 Yes
    3. Check continuity between BCM connector and ground.
      CONTINUITY CHART

      BCM connector Terminal Ground Continuity
      A: M21 144 No
      Fig 3: Checking Continuity Between BCM Connector And Ground
      G05046454Courtesy of NISSAN MOTOR CO., U.S.A.

      Is the inspection result normal? 

      OK: GO TO 4

      NG: Repair or replace harness between BCM and Intelligent Key warning buzzer.

  4. CHECK INTELLIGENT KEY WARNING BUZZER

    Check "COMPONENT INSPECTION ".

    Is the inspection result normal? 

    YES: GO TO 5

    NO: Replace Intelligent Key warning buzzer.

  5. CHECK INTERMITTENT INCIDENT

    Check "INTERMITTENT INCIDENT ".

    Inspection End.