Diagnosis Procedure

Regarding Wiring Diagram information, refer to "WIRING DIAGRAM ".

1. CHECK DTC WITH "BCM"

   Check "Self Diagnostic Result" for BCM with CONSULT.

   Is any other DTC detected? 

   YES: Check the DTC.

   NO: GO TO 2

2. CHECK PARK POSITION SWITCH INPUT SIGNAL
   1. Turn ignition switch ON.
   2. Mechanical key must be removed from the key switch.
   3. Check voltage between driver seat control unit harness connector and ground.

      Driver seat control unit connector	Terminal		Condition		Voltage (V) (Approx.)
      	(+)	(-)
      B202	21	Ground	A/T selector lever	P position	Battery voltage
      				Other than above	0V

      Fig 1: Checking Voltage Between Driver Seat Control Unit Connector B202 And Ground

      Courtesy of NISSAN NORTH AMERICA, INC.

      Is the inspection result normal? 

      YES: GO TO  4

      NO: GO TO 3

3. CHECK PARK POSITION SWITCH CIRCUIT
   1. Turn ignition switch OFF.
   2. Disconnect driver seat control unit and A/T shift selector.
   3. Check continuity between driver seat control unit harness connector and A/T shift selector harness connector.

      A/T shift selector		Driver seat control unit		Continuity
      Connector	Terminal	Connector	Terminal
      M158 (A)	4	B202 (B)	21	Yes

   4. Check continuity between A/T shift selector harness connector and ground.
      Fig 2: Checking Continuity Between A/T Shift Selector Connector M158 Terminal 4 And A/T Shift Selector Harness Connector B202 Terminal 21

      Courtesy of NISSAN NORTH AMERICA, INC.

      A/T shift selector		Ground	Continuity
      Connector	Terminal
      M158 (A)	4		No

      Is the inspection result normal? 

      YES: GO TO 4

      NO: Repair or replace harness.

4. CHECK INTERMITTENT INCIDENT

   Refer to "INTERMITTENT INCIDENT ".

   Is the inspection result normal? 

   YES: Replace driver seat control unit. Refer to "EXPLODED VIEW ".

   NO: Repair or replace the malfunctioning part.