LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Infiniti >> 2003 >> Q45 >> Repair and Diagnosis >> Body & Frame >> Windows >> Power Window System >> Rear Door Control Unit Circuit Check
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Rear Door Control Unit Circuit Check

  1. POWER SUPPLY CIRCUIT CHECK 
    1. Turn ignition switch OFF.
    2. Disconnect rear door control unit LH or RH connector.
    3. Check voltage between rear door control unit LH or RH connector D59(LH) or D79(RH) terminal 6 and ground.
      1. 6 (W/R) - Ground : Battery voltage 
      Fig 1: Checking Voltage Between Rear Door Control Unit LH Or RH Connector D59 (LH) Or D79 (RH) Terminal 6 And Ground
      G02045118Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG 

    1. OK >> GO TO 2.
    2. NG >> Check the following.
      • 40A fusible link (letter H. located in fuse and fusible link box).
      • Harness for open or short between rear door control unit LH or RH and fuse.
  2. GROUND CIRCUIT CHECK 

    Check continuity between passenger door control unit LH or RH connector D59(LH) or D79(RH) terminal 7 and ground.

    1. 7 (B) - Ground : Continuity should exist. 
    Fig 2: Checking Continuity Between Passenger Door Control Unit LH Or RH Connector D59 (LH) Or D79 (RH) Terminal 7 And Ground
    G02045119Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG 

    1. OK >> GO TO 3.
    2. NG >> Repair or replace harness.
  3. COMMUNICATION CIRCUIT CHECK 
    1. Disconnect driver door control unit connector.
    2. Check continuity between driver door control unit connector D8 terminal 5 and rear door control unit LH or RH connector D58 (LH), D78 (RH) terminal 11.
      1. 5 (G/OR) - 11 (G/OR) : Continuity should exist. 
      Fig 3: Checking Continuity Between Driver Door Control Unit Connector D8 Terminal 5 And Rear Door Control Unit LH Or RH Connector D58 (LH), D78 (RH) Terminal 11
      G02045120Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG 

    1. OK >> INSPECTION END.
    2. NG >> Repair or replace harness between door control unit and rear door control unit LH or RH.