Diagnostic Procedure 3

Self-diagnostic results:

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

CONFIRM SELF-DIAGNOSTIC RESULTS
Confirm SELF-DIAGNOSTIC RESULTS "CHAIN OF IMMU-KEY" displayed on CONSULT-II screen.

Is CONSULT-II screen displayed as above?

Yes: GO TO 2 .

No: GO TO "SYMPTOM MATRIX CHART 1 ".

Fig 1: Diagnostic Procedure 3 - Confirming Self-Diagnostic Result
Courtesy of NISSAN MOTOR CO., U.S.A.
CHECK NATS ANTENNA AMP. INSTALLATION
Check NATS antenna amp. installation. Refer to "HOW TO REPLACE NATS ANTENNA AMP. ".

OK or NG

OK: GO TO 3 .

NG: Reinstall NATS antenna amp. correctly.
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.
  Ref. part No, E5
- Perform initialization with CONSULT-II.
- For initialization, refer to "CONSULT-II Operation Manual NATS-IVIS/NVIS".
No: GO TO 4 .
CHECK POWER SUPPLY FOR NATS ANTENNA AMP.
1. Turn ignition switch "ON".
2. Check voltage between NATS antenna amp. connector M27 terminal 1 (L) and ground with CONSULT-II or tester.
  
  Fig 2: Checking Voltage Between NATS Antenna Amp. & Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.
Just after turning ignition switch "ON"

Voltage: Approx. 5V (For 3 seconds)

OK or NG

OK: GO TO 5 .

NG: Check harness for open or short between NATS antenna amp. and BCM (NATS control unit).

NOTE: If harness is OK, replace BCM (NATS control unit), perform initialization with CONSULT-II. For initialization, refer to "CONSULT-II Operation Manual NATS-IVIS/NVIS".
CHECK NATS ANTENNA AMP. SIGNAL LINE-1
Check voltage between NATS antenna amp. connector M27 terminal 3 (G/W) and ground with analogue tester.

Fig 3: Checking Voltage Between NATS Antenna Amp. & Ground
Courtesy of NISSAN MOTOR CO., U.S.A.

Before turning ignition switch "ON"

Voltage: 0V

Just after turning ignition switch "ON"

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 (NATS control unit).

NOTE: If harness is OK, replace BCM (NATS control unit), perform initialization with CONSULT-II. For initialization, refer to "CONSULT-II Operation Manual NATS-IVIS/NVIS".
CHECK NATS ANTENNA AMP. SIGNAL LINE-2
Check voltage between NATS antenna amp. connector M27 terminal 7 (BR) and ground with analogue tester.

Fig 4: Checking Voltage Between NATS Antenna Amp. & Ground
Courtesy of NISSAN MOTOR CO., U.S.A.

Before turning ignition switch "ON"

Voltage: 0V

Just after turning ignition switch "ON"

Pointer of tester should move.

OK or NG

OK: GO TO 7 .
- NG: Check harness for open or short between NATS antenna amp. and BCM (NATS control unit).
  NOTE: If harness is OK, replace BCM (NATS control unit), perform initialization with CONSULT-II. For initialization, refer to "CONSULT-II Operation Manual NATS-IVIS/NVIS".
CHECK NATS ANTENNA AMP. GROUND LINE CIRCUIT
1. Turn ignition switch "OFF".
2. Check continuity between NATS antenna amp. connector M27 terminal 5 (B) and ground.
  Continuity should exist.
  
  Fig 5: Checking Continuity Between NATS Antenna Amp. & Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG
- OK: NATS antenna amp. is malfunctioning.
  Ref. part No. E6
- NG: Check harness for open or short between NATS antenna amp. and BCM (NATS control unit).
  NOTE: If harness is OK, replace BCM (NATS control unit), perform initialization with CONSULT-II. For initialization, refer to "CONSULT-II Operation Manual NATS-IVIS/NVIS".