Diagnostic Procedure 6

Self-diagnostic results: 

"CHAIN OF IMMU-KEY" is displayed on CONSULT-II screen 

1. CONFIRM SELF-DIAGNOSTIC RESULTS 

   Confirm self-diagnostic results "CHAIN OF IMMU-KEY" is displayed on CONSULT-II screen.

   Does CONSULT-II screen display as shown? 

   YES : GO TO 2.

   NO : GO TO "TROUBLE DIAGNOSIS SYMPTOM CHART ".

2. CHECK NATS ANTENNA AMP. INSTALLATION 

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

   OK or NG 

   OK : GO TO 3.

   NG : Reinstall NATS antenna amp. correctly.

3. CHECK KEY ID CHIP 

   Start engine with another registered ignition key or mechanical key.

   Does the engine start? 

   YES : Ignition key or mechanical key ID chip is malfunctioning.

   • Replace the ignition key or mechanical key.
   • Perform initialization with CONSULT-II.

   NO : GO TO 4.

4. CHECK POWER SUPPLY FOR NATS ANTENNA AMP. 

   Check voltage between NATS antenna amp. connector M25 terminal 1 (L/R) and ground with CONSULT-II or tester.

   1 (L/R) - Ground : Battery voltage 

   OK or NG 

   OK : GO TO 5.

   NG : Check harness for open or short between NATS antenna amp. and fuse.

   Fig 1: Identifying Voltage Between NATS Antenna Amp. Connector M25 Terminal 1 (L/R) And Ground

   Courtesy of NISSAN MOTOR CO., U.S.A.
5. CHECK NATS ANTENNA AMP. SIGNAL LINE- 1 

   Check voltage between NATS antenna amp. connector M25 terminal 2 (G/B) and ground with analogue tester.

   Before inserting mechanical key in ignition knob Voltage: 0V 

   Just after inserting mechanical key in ignition knob : Pointer of tester should move. 

   OK or NG 

   OK : GO TO 6.

   NG :

   • Check harness for open or short between NATS antenna amp. and BCM.
     NOTE: If harness is OK, replace BCM, perform initialization with CONSULT-II.
     Fig 2: Identifying Voltage Between NATS Antenna Amp. Connector M25 Terminal 2 (G/B) And Ground

     Courtesy of NISSAN MOTOR CO., U.S.A.
6. CHECK NATS ANTENNA AMP. SIGNAL LINE- 2 

   Check voltage between NATS antenna amp. connector M25 terminal 4 (BR) and ground with analogue tester.

   Before inserting mechanical key in ignition knob Voltage: 0V 

   Just after inserting mechanical key in ignition knob : Pointer of tester should move. 

   Fig 3: Identifying Voltage Between NATS Antenna Amp. Connector M25 Terminal 4 (BR) And Ground

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

   OK or NG 

   OK : GO TO 7.

   NG :

   • Check harness for open or short between NATS antenna amp. and BCM.
     NOTE: If harness is OK, replace BCM, perform initialization with CONSULT-II.
7. CHECK NATS ANTENNA AMP. GROUND LINE CIRCUIT 
   1. Turn ignition switch OFF.
   2. Check continuity between NATS antenna amp. connector M25 terminal 3 (B) and ground.

      3 (B) - Ground : Continuity should exist. 

   OK or NG 

   OK : NATS antenna amp. is malfunctioning.

   NG :

   • Check harness for open or short between NATS antenna amp. and ground.
     NOTE: If harness is OK, replace BCM, perform initialization with CONSULT-II.
     Fig 4: Identifying Continuity Between NATS Antenna Amp. Connector M25 Terminal 3 (B) And Ground

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