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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 >> Push-Button Ignition Switch Illumination 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 PUSH-BUTTON IGNITION SWITCH ILLUMINATION OPERATION

    CONSULT-III

    1. Turn the ignition switch ON.
    2. Select "ENGINE SW ILLUMI" of BCM (INTELLIGENT KEY) active test item.
    3. While operating the test item, check voltage between push-button ignition switch connector M38 terminal 3 and ground.
    VOLTAGE REFERENCE CHART

    Terminals Test item Voltage
    (+) (-)
    Push-button ignition switch Ground ENGINE SW ILLUMI
    Connector Terminal
    M38 3 ON 5 V
    OFF 0 V
    Fig 1: Checking Voltage Between Push-Button Ignition Switch Connector M38 Terminal 3 And Ground
    G05878523Courtesy of NISSAN MOTOR CO., U.S.A.

    Is the inspection result normal? 

    YES: GO TO  4

    NO: GO TO 2

  2. CHECK PUSH-BUTTON IGNITION SWITCH ILLUMINATION POWER SUPPLY OPEN CIRCUIT
    1. Turn the ignition switch OFF.
    2. Disconnect BCM connector M18 and push-button ignition switch connector.
    3. Check continuity between BCM connector M18 (A) terminal 41 and push-button ignition switch connector M38 (B) terminal 3.
    CONTINUITY REFERENCE CHART

    BCM Push-button ignition switch Continuity
    Connector Terminal Connector Terminal
    M18 (A) 41 M38 (B) 3 Yes
    Fig 2: Checking Continuity Between BCM Connector M18 Terminal 41 And Push-Button Ignition Switch Connector M38 Terminal 3
    G05878524Courtesy of NISSAN MOTOR CO., U.S.A.

    Is the inspection result normal? 

    YES: GO TO 3

    NO: Repair the harness or connectors.

  3. CHECK PUSH-BUTTON IGNITION SWITCH ILLUMINATION POWER SUPPLY SHORT CIRCUIT

    Check continuity between BCM connector M18 terminal 41 and ground.

    CONTINUITY REFERENCE CHART

    BCM Ground Continuity
    Connector Terminal
    M18 41 No
    Fig 3: Checking Continuity Between BCM Connector M18 Terminal 41 And Ground
    G05878525Courtesy of NISSAN MOTOR CO., U.S.A.

    Is the inspection result normal? 

    YES: Replace BCM. Refer to "REMOVAL AND INSTALLATION ".

    NO: Repair the harness or connectors.

  4. CHECK PUSH-BUTTON IGNITION SWITCH ILLUMINATION GROUND CIRCUIT
    1. Turn the ignition switch OFF.
    2. Disconnect push-button ignition switch connector.
    3. Check continuity between push-button ignition switch connector M38 terminal 2 and ground.
    CONTINUITY REFERENCE CHART

    Push-button ignition switch Ground Continuity
    Connector Terminal
    M38 2 No
    Fig 4: Checking Continuity Between Push-Button Ignition Switch Connector M38 Terminal 2 And Ground
    G05878526Courtesy of NISSAN MOTOR CO., U.S.A.

    Is the inspection result normal? 

    YES: Replace push-button ignition switch.

    NO: GO TO 5

  5. CHECK PUSH-BUTTON IGNITION SWITCH ILLUMINATION GROUND OPEN CIRCUIT
    1. Disconnect BCM connector M17.
    2. Check continuity between BCM connector M17 (A) terminal 14 and push-button ignition switch connector M38 (B) terminal 2.
    CONTINUITY REFERENCE CHART

    BCM Push-button ignition switch Continuity
    Connector Terminal Connector Terminal
    M17 (A) 14 M38 (B) 2 Yes
    Fig 5: Checking Continuity Between BCM Connector M17 Terminal 14 And Push-Button Ignition Switch Connector M38 Terminal 2
    G05878527Courtesy of NISSAN MOTOR CO., U.S.A.

    Is the inspection result normal? 

    YES: Replace BCM. Refer to "REMOVAL AND INSTALLATION ".

    NO: Repair the harness or connectors.

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