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Home >> Lexus >> 2007 >> LS 460L >> Repair and Diagnosis >> External Pages >> Different car >> Section 640 (Security Control System) >> Component Diagnosis >> B2603 Shift Position Status >> 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 DTC WITH IPDM E/R

    Check "Self diagnostic result" with CONSULT-III. Refer to "DTC INDEX ".

    Is the inspection result normal? 

    YES: GO TO 2.

    NO: Repair or replace malfunctioning parts.

  2. CHECK PNP SWITCH CIRCUIT
    1. Turn ignition switch OFF.
    2. Disconnect TCM harness connector and BCM harness connector.
    3. Check continuity between TCM harness connector F16 (A) terminal 20 and BCM harness connector M18 (B) terminal 48.
      CONTINUITY REFERENCE CHART

      TCM BCM Continuity
      Connector Terminal Connector Terminal
      A: F16 20 B: M18 48 Yes
    4. Check continuity between TCM harness connector F16 (A) terminal 20 and ground.
      CONTINUITY REFERENCE CHART

      TCM Ground Continuity
      Connector Terminal
      A: F16 20 Ground No
      Fig 1: Checking Continuity Between TCM Harness Connector F16 Terminal 20 And Ground
      G05876375Courtesy of NISSAN MOTOR CO., U.S.A.

      Is the inspection result normal? 

      YES: GO TO 3.

      NO: Repair harness or connector.

  3. CHECK CVT DEVICE POWER SUPPLY
    1. Turn ignition switch OFF.
    2. Disconnect CVT device harness connector.
    3. Check voltage between CVT device harness connector and ground.
      VOLTAGE REFERENCE CHART

      CVT device Ground Voltage [V]
      Connector Terminal
      M78 8 Ground Battery voltage
      Fig 2: Checking Voltage Between CVT Device Harness Connector And Ground
      G05876376Courtesy of NISSAN MOTOR CO., U.S.A.

      Is the inspection result normal? 

      YES: GO TO  5.

      NO: GO TO 4.

  4. CHECK CVT DEVICE POWER SUPPLY CIRCUIT
    1. Disconnect BCM harness connector.
    2. Check continuity between BCM harness connector M19 (A) terminal 84 and CVT device harness connector M78 (B) terminal 8.
      CONTINUITY REFERENCE CHART

      BCM CVT device Continuity
      Connector Terminal Connector Terminal
      A: M19 84 B: M78 8 Yes
    3. Check continuity between BCM harness connector M19 (A) terminal 84 and ground.
      CONTINUITY REFERENCE CHART

      BCM Ground Continuity
      Connector Terminal
      A: M19 84 Ground No
      Fig 3: Checking Continuity Between BCM Harness Connector M19 Terminal 84 And Ground
      G05876377Courtesy of NISSAN MOTOR CO., U.S.A.

      Is the inspection result normal? 

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

      NO: Repair harness or connector.

  5. CHECK CVT DEVICE CIRCUIT
    1. Disconnect BCM harness connector.
    2. Check continuity between BCM harness connector M19 (A) terminal 87 and CVT device harness connector M78 (B) terminal 9.
      CONTINUITY REFERENCE CHART

      BCM CVT device Continuity
      Connector Terminal Connector Terminal
      A: M19 87 B: M78 9 Yes
    3. Check continuity between BCM harness connector M19 (A) terminal 87 and ground.
      CONTINUITY REFERENCE CHART

      BCM Ground Continuity
      Connector Terminal
      A: M19 87 Ground No
      Fig 4: Checking Continuity Between BCM Harness Connector M19 Terminal 87 And Ground
      G05876378Courtesy of NISSAN MOTOR CO., U.S.A.

      Is the inspection result normal? 

      YES: GO TO 6.

      NO: Repair harness or connector.

  6. CHECK CVT DEVICE

    Refer to "COMPONENT INSPECTION ".

    Is the inspection result normal? 

    YES: GO TO 7.

    NO: Replace CVT device. Refer to "REMOVAL AND INSTALLATION ".

  7. CHECK INTERMITTENT INCIDENT

    Refer to "INTERMITTENT INCIDENT ".

    Inspection End.

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