Check NATS Antenna Amp. Built In Key Slot

For the circuit information of this diagnosis, refer to Engine Immobilizer System Circuit Diagram.

1. CHECK POWER SUPPLY CIRCUIT 
   1. Turn ignition switch OFF.
   2. Disconnect key slot connector.
   3. Check voltage between key slot connector and ground.
      VOLTAGE SPECIFICATIONS
      
      

      Terminals			Voltage (V) (Approx.)
      (+)		(-)
      Key slot connector	Terminal
      M14	1	Ground	Battery voltage

   Fig 1: Checking Voltage Between Key Slot Connector And Ground

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

   OK or NG 

   OK: GO TO 2.

   NG: Check key slot power supply circuit for open or short.

2. CHECK GROUND CIRCUIT 

   Check continuity between key slot connector and ground.

   CONTINUITY CONDITIONS
   
   

   Key slot connector	Terminal	Ground	Continuity
   M14	8		Yes

   Fig 2: Checking Continuity Between Key Slot Connector And Ground

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

   OK or NG 

   OK: GO TO 3.

   NG: Repair or replace harness.

3. CHECK KEY SLOT SIGNAL 
   1. Connect key slot connector.
   2. Check voltage between key slot connector and ground.
      VOLTAGE SPECIFICATIONS
      
      

      Terminals			Condition	Voltage (V) (Approx.)
      (+)		(-)
      Key slot connector	Terminal
      M14	6	Ground	Check the voltage just after the Intelligent Key is inserted into the key slot and the ignition switch is turned to START.	The pointer of the analog tester fluctuates.
      	7

   Fig 3: Checking Voltage Between Key Slot Connector And Ground

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

   OK or NG 

   OK: Check the condition of harness and connector.

   NG: Repair or replace harness between BCM and key slot.