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Lifting Switch (Front) Circuit Inspection

WARNING: This page is about a different car, the 2008 Nissan Quest. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK FUNCTION 

    With CONSULT-III 

    With "LIFT FR SW-UP, LIFT FR SW-DN" on the DATA MONITOR, operate the lifting switch (front) to check ON/OFF operation.

    DATA MONITOR REFERENCE

    Monitor item [OPERATION or UNIT] Contents
    LIFT FR SW-DN "ON/OFF" ON/OFF status judged from the FR lifter switch (DOWN) signal is displayed.
    LIFT RR SW-UP "ON/OFF" ON/OFF status judged from the RR lifter switch (UP) signal is displayed.

    Without CONSULT-III 

    1. Turn ignition switch OFF.
    2. Check voltage between driver seat control unit connector and ground.
      TERMINALS VOLTAGE CHART

      Connector Terminals Condition Voltage (V) (Approx.)
      (+) (-)
      B401 13 Ground Lifting switch (front) ON (DOWN operation) 0
      Other than above Battery voltage
      28 Lifting switch (front) ON (UP operation) 0
      Other than above Battery voltage

    OK or NG 

    OK: Lifting switch (front) circuit is OK.

    NG: GO TO 2.

    Fig 1: Checking Voltage Between Driver Seat Control Unit Connector And Ground
    G04903032Courtesy of NISSAN MOTOR CO., U.S.A.
  2. CHECK LIFTING SWITCH (FRONT) CIRCUIT HARNESS CONTINUITY 
    1. Disconnect driver seat control unit and power seat switch LH.
    2. Check continuity between driver seat control unit connector B401 terminals 13, 28 and power seat switch LH connector B407 terminals 5, 6.

      13 - 5 : Continuity should exist. 

      28 - 6 : Continuity should exist. 

    3. Check continuity between driver seat control unit connector B401 terminals 13, 28 and ground

      13 - Ground : Continuity should not exist. 

      28 - Ground : Continuity should not exist. 

      Fig 2: Checking Continuity Between Driver Seat Control Unit Connector Terminals And Ground, And Between Connector Terminals And Power Seat Switch LH Connector Terminals
      G04907751Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG 

    OK: GO TO 3.

    NG: Repair or replace harness.

  3. CHECK LIFTING SWITCH (FRONT) 

    Check continuity between power seat switch LH terminals as follows.

    TERMINALS CONTINUITY CHART

    Terminals Condition Continuity
    5 3 Lifting switch (front) ON (DOWN operation) Yes
    Other than above No
    6 Lifting switch (front) ON (UP operation) Yes
    Other than above No

    OK or NG 

    OK: Check the condition of the harness and connector.

    NG: Replace power seat switch LH. Refer to "FRONT SEAT ".

    Fig 3: Checking Continuity Between Power Seat Switch LH Terminal 3 And Terminals 5 & 6
    G04907752Courtesy of NISSAN MOTOR CO., U.S.A.
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