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Power Liftgate Switch System Inspection: Notes

WARNING: This page is about a different car, the 2006 Infiniti QX56. However, it is still accessible from the selected car via links, so may be relevant.
  1. POWER LIFTGATE SWITCH FUNCTION INSPECTION 

    Check power liftgate switch using switch operation.

    OK or NG 

    • OK : Power liftgate switch is OK.
    • NG : GO TO 2.
  2. POWER LIFTGATE SWITCH POWER SUPPLY CIRCUIT INSPECTION 
    1. Turn ignition switch OFF.
    2. Check voltage between power liftgate switch connector M92 terminal 1 and ground.

      1 - Ground : Approx. battery voltage 

      Fig 1: Identifying Voltage Between Power Liftgate Switch Connector M92 Terminal 1 And Ground
      G04135092Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG 

    • OK : GO TO 3.
    • NG : Repair or replace harness.
  3. POWER LIFTGATE SWITCH SIGNAL INSPECTION 
    1. Turn ignition switch OFF.
    2. While operating the power liftgate switch, check voltage between back door control unit connector B55 terminal 23 and ground.
      TERMINALS VOLTAGE CHART

      Terminals Condition Voltage (V) (Approx.)
      (+) (-)
      23 Ground Power liftgate switch ON 0
      OFF 5
      Fig 2: Identifying Voltage Between Back Door Control Unit Connector B55 Terminal 23 And Ground
      G04135093Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG 

    • OK : Switch is OK.
    • NG : GO TO 4.
  4. POWER LIFTGATE SWITCH CIRCUIT INSPECTION 
    1. Disconnect power liftgate switch and back door control unit connector.
    2. Check continuity between power liftgate switch connector M92 terminal 1 and back door control unit connector B55 terminal 23.

      1 - 23 : Continuity should exist. 

      Fig 3: Identifying Connector M92 Terminal 1 And Back Door Control Unit Connector B55 Terminal 23
      G04135094Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG 

    • OK : GO TO 5.
    • NG : Repair or replace harness.
  5. POWER LIFTGATE SWITCH GROUND INSPECTION 

    Check continuity between power liftgate switch connector terminal 2 and ground.

    2 - Ground : Continuity should exist. 

    Fig 4: Identifying Continuity Between Power Liftgate Switch Connector Terminal 2 And Ground
    G04135095Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG 

    • OK : Replace the power liftgate switch.
    • NG : Repair or replace harness.
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