Diagnosis Procedure

Regarding Wiring Diagram information, refer to "WIRING DIAGRAM - WITHOUT INTELLIGENT KEY SYSTEM ".

1. CHECK NATS ANTENNA AMP. INSTALLATION

   Check NATS antenna amp. installation. Refer to "REMOVAL AND INSTALLATION ".

   Is the inspection result normal? 

   YES: GO TO 2

   NO: Reinstall NATS antenna amp. correctly.

2. CHECK NVIS (NATS) IGNITION KEY ID CHIP

   Start engine with another registered NATS ignition key.

   Does the engine start? 

   YES >>

   • Ignition key ID chip is malfunctioning.
   • Replace the ignition key.
   • Perform initialization with CONSULT.

   For initialization, refer to "CONSULT Operation Manual".

   NO: GO TO 3

3. CHECK POWER SUPPLY FOR NATS ANTENNA AMP.
   1. Turn ignition switch OFF.
   2. Check voltage between NATS antenna amp. connector M21 terminal 1 and ground.

      1 - Ground: Battery voltage 

      Fig 1: Checking Voltage Between NATS Antenna Amp. Connectors M21 Terminal 1 And Ground

      Courtesy of NISSAN NORTH AMERICA, INC.

      Is the inspection result normal? 

      YES: GO TO 4

      NO: Repair or replace fuse or harness.

4. CHECK NATS ANTENNA AMP. GROUND LINE CIRCUIT
   1. Disconnect NATS antenna amp. connector.
   2. Check continuity between NATS antenna amp. connector M21 terminal 3 and ground.

      3 - Ground: Continuity should exist  .

      Fig 2: Checking Continuity Between NATS Antenna Amp. Connector M21 Terminal 3 And Ground

      Courtesy of NISSAN NORTH AMERICA, INC.

      Is the inspection result normal? 

      YES: GO TO 5

      NO >>

      • Repair or replace harness.
      NOTE: If harness is OK, replace BCM, refer to "REMOVAL AND INSTALLATION ". Perform initialization with CONSULT. For initialization, refer to "CONSULT Operation Manual".
5. CHECK NATS ANTENNA AMP. SIGNAL LINE- 1
   1. Connect NATS antenna amp. connector.
   2. Turn ignition switch ON.
   3. Check voltage between NATS antenna amp. connector M21 terminal 2 and ground with analog tester.
      Fig 3: Checking Voltage Between NATS Antenna Amp. Connector M21 Terminal 2 And Ground Using Analog Tester

      Courtesy of NISSAN NORTH AMERICA, INC.

      Terminals		Position of ignition key cylinder	Voltage (V) (Approx.)
      (+)	(-)
      2	Ground	Before inserting ignition key	Battery voltage
      		After inserting ignition key	Pointer of tester should move for approx. 30 seconds, then return to battery voltage
      		Just after turning ignition switch ON	Pointer of tester should move for approx. 1 second, then return to battery voltage

      Is the inspection result normal? 

      YES: GO TO 6

      NO >>

      • Repair or replace harness.
      NOTE: If harness is OK, replace BCM, refer to "REMOVAL AND INSTALLATION ". Perform initialization with CONSULT. For initialization, refer to "CONSULT Operation Manual".
6. CHECK NATS ANTENNA AMP. SIGNAL LINE- 2

   Check voltage between NATS antenna amp. connector M21 terminal 4 and ground with analog tester.

   Fig 4: Checking Voltage Between NATS Antenna Amp. Connector M21 Terminal 4 And Ground Using Analog Tester

   Courtesy of NISSAN NORTH AMERICA, INC.

   Terminals		Position of ignition key cylinder	Voltage (V) (Approx.)
   (+)	(-)
   4	Ground	Before inserting ignition key	Battery voltage
   		After inserting ignition key	Pointer of tester should move for approx. 30 seconds, then return to battery voltage
   		Just after turning ignition switch ON	Pointer of tester should move for approx. 1 second, then return to battery voltage

   Is the inspection result normal? 

   YES: NATS antenna amp. is malfunctioning.

   NO >>

   • Repair or replace harness.
   NOTE: If harness is OK, replace BCM, refer to "REMOVAL AND INSTALLATION ". Perform initialization with CONSULT. For initialization, refer to "CONSULT Operation Manual".