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Front Lifting Switch Circuit Check

WARNING: This page is about a different car, the 2004 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.

    FRONT LIFTING SWITCH CIRCUIT CHECK CHART

    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: Scan Tool Displaying DATA MONITOR
    G03497754Courtesy 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.
      VOLTAGE CHECK CHART

      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
      G03497755Courtesy 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).

      13 (O/B) - 13 (O/B): Continuity should exist. 

      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

      13 (O/B) - Ground: Continuity should not exist. 

      28 (L/R) - Ground: Continuity should not exist. 

      Fig 3: Checking Continuity Between Driver Seat Control Unit Connector And Driver Seat Switch Connector, And Ground
      G03497756Courtesy 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.

    CONTINUITY CHECK CHART

    Terminals Condition Continuity
    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
    G03497757Courtesy 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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