Diagnosis Procedure

1. CHECK REAR PARCEL SHELF ANTENNA INPUT SIGNAL 1
   1. Turn ignition switch OFF.
   2. Check signal between BCM connector and ground with oscilloscope.
   Fig 1: Checking Signal Between BCM Connector And Ground With Oscilloscope

   Courtesy of NISSAN MOTOR CO., U.S.A.NISSAN MOTOR CO., U.S.A.NISSAN MOTOR CO., U.S.A.
   TERMINALS CONDITION REFERENCE
   
   

   Terminals				Condition	Signal (Reference value.)
   (+)			(-)
   BCM connector		Terminal
   M21	Rear parcel shelf antenna	115	Ground	Place Intelligent Key inside the vehicle.	Courtesy of NISSAN MOTOR CO., U.S.A.
   				Place Intelligent Key outside the vehicle.	Courtesy of NISSAN MOTOR CO., U.S.A.

   Is the inspection result normal? 

   YES: Check the condition of harness and connector.

   NO: GO TO 2

2. CHECK REAR PARCEL SHELF ANTENNA CIRCUIT
   1. Disconnect BCM and rear parcel shelf antenna connector.
   2. Check continuity between BCM connector and rear parcel shelf antenna connector.
      CONTINUITY CHART
      
      

      BCM connector	Terminal	Rear parcel shelf antenna connector		Terminal	Continuity
      A: M21	114	B: B29	Trunk room	2	Yes
      	115			1

   3. Check continuity between BCM connector and ground.
      CONTINUITY CHART
      
      

      BCM connector		Terminal	Ground	Continuity
      A: M21	Trunk room	114		No
      		115

   Fig 2: Checking Continuity Between BCM Connector And Ground

   Courtesy of NISSAN MOTOR CO., U.S.A.

   Is the inspection result normal? 

   YES: GO TO 3

   NO: Repair or replace harness between BCM and rear parcel shelf antenna.

3. CHECK REAR PARCEL SHELF ANTENNA INPUT SIGNAL 2
   1. Replace rear parcel shelf antenna (new antenna or other antenna).
   2. Connect BCM and rear parcel shelf antenna connector.
   3. Check signal between BCM connector and ground with oscilloscope.

Fig 3: Checking Signal Between BCM Connector And Ground With Oscilloscope

Courtesy of NISSAN MOTOR CO., U.S.A.NISSAN MOTOR CO., U.S.A.NISSAN MOTOR CO., U.S.A.

Terminals				Condition	Signal (Reference value.)
(+)			(-)
BCM connector		Terminal
M21	Trunk room	115	Ground	Place Intelligent Key inside the vehicle.	Courtesy of NISSAN MOTOR CO., U.S.A.
				Place Intelligent Key outside the vehicle.	Courtesy of NISSAN MOTOR CO., U.S.A.

Is the inspection result normal? 

YES: Replace rear parcel shelf antenna. Refer to "REMOVAL AND INSTALLATION ".

NO: Replace BCM. Refer to "REMOVAL AND INSTALLATION ".