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Home >> Nissan-Datsun >> 2004 >> Altima S, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 1033 (Interior Lighting System) >> Component Diagnosis >> Step Lamp Circuit >> 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 STEP LAMP OUTPUT

    CONSULT-III

    1. Turn ignition switch ON.
    2. Select "STEP LAMP TEST" of BCM (INT LAMP) active test item.
    3. While operating the test item, check voltage between BCM connector M17 terminal 7 and ground.
    VOLTAGE REFERENCE CHART

    BCM Ground Test item Voltage
    Connector Terminal STEP LAMP TEST
    M17 7 ON 0 V
    OFF Battery voltage
    Fig 1: Checking Voltage Between BCM Connector M17 Terminal 7 And Ground
    G05878517Courtesy of NISSAN MOTOR CO., U.S.A.

    Is the inspection result normal? 

    YES: Step lamp control circuit is operating normally.

    Fixed ON: GO TO  3

    Fixed OFF: GO TO 2

  2. CHECK STEP LAMP OPEN CIRCUIT
    1. Turn ignition switch OFF.
    2. Disconnect BCM connector M17 and step lamp connectors.
    3. Check continuity between BCM connector M17 (A) terminal 7 and step lamp connectors (B) terminal 2.
    Fig 2: Checking Continuity Between BCM Connector M17 Terminal 7 And Step Lamp Connectors Terminal 2
    G05878518Courtesy of NISSAN MOTOR CO., U.S.A.
    CONTINUITY REFERENCE CHART

    BCM Step lamp Continuity
    Connector Terminal Connector Terminal
    M17 (A) 7 Front LH D11 (B) 2 Yes
    Front RH D109 (B) 2
    Rear LH D206 (B) 2
    Rear RH D301 (B) 2

    Is the inspection result normal? 

    YES: Check step lamp for an open. If OK, replace BCM. Refer to "REMOVAL AND INSTALLATION ". If NG, replace step lamp. Refer to "REMOVAL AND INSTALLATION ".

    NO: Repair harness or connectors.

  3. CHECK STEP LAMP SHORT CIRCUIT
    1. Turn ignition switch OFF.
    2. Disconnect BCM connector M17 and step lamp connectors.
    3. Check continuity between BCM connector M17 terminal 7 and ground.
    CONTINUITY REFERENCE CHART

    BCM Ground Continuity
    Connector Terminal
    M17 7 No
    Fig 3: Checking Continuity Between BCM Connector M17 Terminal 7 And Ground
    G05878519Courtesy of NISSAN MOTOR CO., U.S.A.

    Is the inspection result normal? 

    YES: Check step lamp for a short circuit. If OK, replace BCM.

    Refer to "REMOVAL AND INSTALLATION ". If NG, replace step lamp. Refer to "REMOVAL AND INSTALLATION ".

    NO: Repair the harness or connectors.

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