Diagnosis Procedure

Regarding Wiring Diagram information, refer to "WIRING DIAGRAM - WITHOUT INTELLIGENT KEY SYSTEM ".

1. POWER LIFTGATE SWITCH FUNCTION INSPECTION 

   Check power liftgate switch using switch operation.

   Did the back door respond correctly? 

   YES: Power liftgate switch is OK.

   NO: GO TO 2

2. 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.

      Terminal		Measuring condition		Voltage (V) (Approx.)
      (+)	(-)
      23	Ground	Power liftgate switch	ON	0
      			OFF	Battery voltage

      Fig 1: Checking Power Liftgate Switch Signal

      Courtesy of NISSAN NORTH AMERICA, INC.

      Is the inspection result normal? 

      YES: Switch is OK.

      NO: GO TO 3

3. POWER LIFTGATE SWITCH CIRCUIT INSPECTION 
   1. Disconnect back door control unit and power liftgate switch connectors.
   2. Check continuity between back door control unit connector (A) B55 terminal 23 and power liftgate switch connector (B) M92 terminal 1.

      23 - 1: Continuity should exist. 

   3. Check continuity between back door control unit connector (A) B55 terminal 23 and ground.

      23 - Ground: Continuity should not exist. 

      Fig 2: Checking Power Liftgate Switch Circuit

      Courtesy of NISSAN NORTH AMERICA, INC.

      Is the inspection result normal? 

      YES: GO TO 4

      NO: Repair the harness between the power liftgate switch and the back door control unit.

4. POWER LIFTGATE SWITCH GROUND INSPECTION 

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

   2 - Ground: Continuity should exist. 

   Fig 3: Checking Power Liftgate Switch Ground

   Courtesy of NISSAN NORTH AMERICA, INC.

   Is the inspection result normal? 

   YES: GO TO 5

   NO: Repair the harness between the power liftgate switch and ground.

5. POWER LIFTGATE SWITCH POWER SUPPLY CIRCUIT INSPECTION 
   1. Reconnect back door control unit.
   2. Ensure liftgate is closed.
   3. Check voltage between power liftgate switch connector M92 terminal 1 and ground.

      1 - Ground: Approx. battery voltage 

      Fig 4: Checking Power Liftgate Switch Power Supply Circuit Voltage

      Courtesy of NISSAN NORTH AMERICA, INC.

      Is the inspection result normal? 

      YES: Replace the power liftgate switch.

      NO: Replace the back door control unit.