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Lifting Switch (Front) Circuit Inspection

WARNING: This page is about a different car, the 2004 Nissan Quest. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK FUNCTION 

    With CONSULT-II 

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

    CHECK FUNCTION

    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.
    Fig 1: Display DATA MONITOR
    G03500393Courtesy of NISSAN MOTOR CO., U.S.A.

    Without CONSULT-II 

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

    Connector Terminals (Wire color) Condition Voltage (V) (Approx)
    (+) (-)
    P2 13 (L/B) Ground Lifting switch (front) ON (DOWN operation) 0
    Lifting switch (front) OFF Battery voltage
    28 (Y/B) Lifting switch (front) ON (UP operation) 0
    Lifting switch (front) OFF Battery voltage

    OK or NG

    1. OK: Lifting switch (front) circuit is OK.
    2. NG: GO TO 2.
    Fig 2: Checking Voltage Between Driver Seat Control Unit Connector & Ground
    G03500394Courtesy 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 P2 terminals 13 (L/B), 28 (Y/B) and power seat switch LH connector P2 terminals 5 (L/B), 6 (Y/B).
      1. 13 (L/B) - 5 (L/B): Continuity should exist. 
      2. 28 (Y/B) - 6 (Y/B): Continuity should exist. 
    3. Check continuity between driver seat control unit connector P2 terminals 13 (L/B), 28 (Y/B) and ground
      1. 13 (L/B)-Ground: Continuity should not exist. 
      2. 28 (Y/B) - Ground: Continuity should not exist. 

      OK or NG

      1. OK: GO TO 3.
      2. NG: Repair or replace harness.
      Fig 3: Checking Continuity Between Driver Seat Control Unit Connector & Ground
      G03500395Courtesy of NISSAN MOTOR CO., U.S.A.
  3. CHECK LIFTING SWITCH (FRONT) 

    Check continuity between power seat switch LH as follows.

    CHECK LIFTING SWITCH (FRONT)

    Connector Terminals Condition Continuity
    (+) (-)
    P8 5 3 Lifting switch (front) ON (DOWN operation) Yes
    Lifting switch (front) OFF No
    6 Lifting switch (front) ON (UP operation) Yes
    Lifting switch (front) OFF No

    OK or NG

    1. OK: Check the condition of the harness and connector.
    2. NG: Replace power seat switch LH.
    Fig 4: Checking Continuity Between Power Seat Switch LH
    G03500396Courtesy of NISSAN MOTOR CO., U.S.A.
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