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BCM Check

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 RETAINED POWER INPUT SIGNAL 

    Check voltage between sunroof motor assembly connector and ground.

    VOLTAGE CHART

    Connector Terminals (Wire color) Condition Voltage (V) (Approx.)
    (+) (-)
    R6 9 (W) Ground Ignition switch ON Battery voltage
    More than 45 seconds after ignition switch in turned to OFF position 0
    Within approx. 45 seconds after ignition switch OFF while front door LH or RH is open 0
    Fig 1: Checking Voltage Between Sunroof Motor Assembly Connector And Ground
    G03359039Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG

    1. OK : Retained power operation input signal is OK.
    2. NG : GO TO 2.
  2. CHECK HARNESS CONTINUITY 
    1. Turn ignition switch OFF.
    2. Disconnect BCM and sunroof motor assembly connector.
    3. Check continuity between BCM connector M35 terminal 29 and sunroof motor assembly connector R6 terminal 9.
      1. 29 (W/L)-9 (W) : Continuity should exist. 
    4. Check continuity between BCM connector M35 terminal 29 and ground.
      1. 29 (W/L)-Ground : Continuity should not exist. 

    OK or NG

    1. OK : GO TO 3.
    2. NG : Repair or replace harness between BCM and sunroof motor assembly.
    Fig 2: Checking Continuity Between BCM Connector M35 Terminal 29 And Ground, And Between BCM Connector M35 Terminal 29 And Sunroof Motor Assembly Connector R6 Terminal 9
    G03359040Courtesy of NISSAN MOTOR CO., U.S.A.
  3. CHECK RETAINED POWER OUTPUT SIGNAL 
    1. Connect BCM connector.
    2. Check voltage between BCM connector and ground.
    VOLTAGE CHART

    Connector Terminals (Wire color) Condition Voltage (V) (Approx.)
    (+) (-)
    M35 29 (W/L) Ground Ignition switch ON Battery voltage
    More than 45 seconds after ignition switch in turned to OFF position 0
    Within approx. 45 seconds after ignition switch OFF while front door LH or RH is open 0

    OK or NG

    1. OK : Check condition of the harness and the connector.
    2. NG : Replace BCM.
    Fig 3: Checking Voltage Between BCM Connector And Ground
    G03359041Courtesy of NISSAN MOTOR CO., U.S.A.
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