Diagnosis Procedure

1. CHECK INSIDE KEY 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
   M19	Instrument panel antenna	67	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 INSIDE KEY ANTENNA CIRCUIT
   1. Disconnect BCM and instrument panel antenna connector.
   2. Check continuity between BCM connector and instrument panel antenna connector.
      CONTINUITY CHART
      
      

      BCM connector	Terminal	Instrument panel antenna connector		Terminal	Continuity
      A: M19	66	B: M49	Instrument center	2	Yes
      	67			1

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

      BCM connector		Terminal	Ground	Continuity
      A: M19	Instrument panel antenna	66		No
      		67

   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 instrument panel antenna.

3. CHECK INSIDE KEY ANTENNA INPUT SIGNAL 2
   1. Replace instrument panel antenna (new antenna or other antenna).
   2. Connect BCM and instrument panel 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
M19	Instrument panel antenna	67	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 instrument panel antenna. Refer to "REMOVAL AND INSTALLATION ".

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