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Front Lifting Switch Circuit Inspection

WARNING: This page is about a different car, the 2003 Nissan Murano. 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 front lifting switch to check ON/OFF operation.

    MONITOR ITEM

    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: Displaying "LIFT FR SW-UP, LIFT FR SW-DN" on DATA MONITOR
    G03359216Courtesy 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.
      TERMINALS (WIRE COLOR)

      Connector Terminals (Wire color) Condition Voltage (V) (Approx)
      (+) (-)
      B303 13 (O/B) Ground Front lifting switch ON (DOWN operation) 0
      Front lifting switch OFF Battery voltage
      28 (L/R) Front lifting switch ON (UP operation) 0
      Front lifting switch OFF Battery voltage
      Fig 2: Checking Voltage Between Driver Seat Control Unit Connector And Ground
      G03359217Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG

    1. OK : Front lifting switch circuit is OK.
    2. NG : GO TO 2.
  2. CHECK FRONT RIFTING SWITCH CIRCUIT HARNESS CONTINUITY 
    1. Disconnect driver seat control unit connector and power seat switch connector.
    2. Check continuity between driver seat control unit connector B303 terminals 13 (O/B), 28 (L/R) and driver seat switch connector B305 terminals 13 (O/B), 28 (L/R).
      1. 13 (O/B) - 13 (O/B): Continuity should exist. 
      2. 28 (L/R) - 28 (L/R): Continuity should exist. 
    3. Check continuity between driver seat control unit connector B303 terminals 13 (O/B), 28 (L/R) and ground
      1. 13 (O/B) - Ground: Continuity should not exist. 
      2. 28 (L/R) - Ground: Continuity should not exist. 
      Fig 3: Checking Continuity Between Connector B303 Terminals 13, 28 And Driver Seat Switch Connector B305 Terminals 13, 28, And Between Connector B303 Terminals 13, 28 And Ground
      G03359218Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG

    1. OK : GO TO 3.
    2. NG : Repair or replace harness between driver seat control unit and power seat switch.
  3. CHECK FRONT LIFTING SWITCH 

    Check continuity between driver seat switch as follows.

    TERMINALS (WIRE COLOR)

    Connector Terminals (Wire color) Condition Voltage (V) (Approx)
    (+) (-)
    B305 13 32A Front lifting switch ON (DOWN operation) Yes
    Front lifting switch OFF No
    28 Front lifting switch ON (UP operation) Yes
    Front lifting switch OFF No
    Fig 4: Checking Continuity Between Driver Seat Switch Terminals 13, 28 And 32A
    G03359219Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG

    1. OK : Check the condition of the harness and connector.
    2. NG : Replace power seat switch (driver side).
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