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

      Is the inspection result normal? 

      YES: GO TO  4

      NO: GO TO 3

      Fig 1: Checking Park Position Switch Input Signal Voltage

      Courtesy of NISSAN NORTH AMERICA, INC.
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 (A) and A/T shift selector harness connector (B).

      A		B		Continuity
      Connector	Terminal	Connector	Terminal
      B202	21	M203	6	Yes

   4. Check continuity between driver seat control unit harness connector (A) and ground.
      Fig 2: Checking Park Position Switch Circuit Continuity

      Courtesy of NISSAN NORTH AMERICA, INC.

      A		Ground	Continuity
      Connector	Terminal
      B202	21		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 "REMOVAL AND INSTALLATION ".

   NO: Repair or replace the malfunctioning part.