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Home >> Infiniti >> 2004 >> QX56 RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1222 (Body, Lock & Security System) >> IVIS (INFINITI Vehicle Immobilizer System-NATS) >> Diagnostic Procedure 5

Diagnostic Procedure 5

WARNING: This page is about a different car, the 2005 Infiniti QX56. However, it is still accessible from the selected car via links, so may be relevant.

Self-diagnostic results: 

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

  1. CONFIRM SELF-DIAGNOSTIC RESULTS 

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

    Is CONSULT-II screen displayed as above? 

    1. Yes: GO TO 2.
    2. No: GO TO "SYMPTOM MATRIX CHART 1 ".
    Fig 1: Identifying "CHAIN OF IMMU-KEY"
    G02385354Courtesy of NISSAN MOTOR CO., U.S.A.
  2. CHECK NATS ANTENNA AMP. INSTALLATION 

    Check NATS antenna amp. installation. Refer to "HOW TO REPLACE NATS ANTENNA AMP. ".

    OK or NG

    1. OK: GO TO 3.
    2. NG: Reinstall NATS antenna amp. correctly.
  3. CHECK IVIS (NATS) IGNITION KEY ID CHIP 

    Start engine with another registered NATS ignition key.

    Does the engine start? 

    1. 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".

    2. No: GO TO 4.
  4. CHECK POWER SUPPLY FOR NATS ANTENNA AMP. 
    1. Turn ignition switch ON.
    2. Check voltage between NATS antenna amp. connector M21 terminal 1 and ground.
      1. 1 (W) - Ground: Battery voltage 

    OK or NG

    1. OK: GO TO 5.
    2. NG: Repair or replace harness.
    Fig 2: Checking Voltage Between NATS Antenna Amp. Connector M21 Terminal 1 And Ground
    G02385355Courtesy of NISSAN MOTOR CO., U.S.A.
  5. CHECK NATS ANTENNA AMP. SIGNAL LINE- 1 

    Check voltage between NATS antenna amp. connector M21 terminal 2 and ground with analog tester.

    Fig 3: Checking NATS Antenna Amp. Terminal 2 And Ground Signal Line 1
    G02385356Courtesy of NISSAN MOTOR CO., U.S.A.
    Fig 4: Checking Voltage Between NATS Antenna Amp. Connector M21 Terminal 2 And Ground
    G02385357Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG

    1. OK: GO TO 6.
    2. NG:
      • Repair or replace harness.
        NOTE: If harness is OK, replace BCM, perform initialization with CONSULT-II. For initialization, refer to "CONSULT-II Operation Manual NATS-IVIS/NVIS".
  6. CHECK NATS ANTENNA AMP. SIGNAL LINE- 2 

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

    Fig 5: Checking NATS Antenna Amp. Terminal 4 And Ground Signal Line 2
    G02385358Courtesy of NISSAN MOTOR CO., U.S.A.
    Fig 6: Checking Voltage Between NATS Antenna Amp. Connector M21 Terminal 4 And Ground
    G02385359Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG

    1. OK: GO TO 7.
    2. NG:
      • Repair or replace harness.
        NOTE: If harness is OK, replace BCM, perform initialization with CONSULT-II. For initialization, refer to "CONSULT-II Operation Manual NATS-IVIS/NVIS".
  7. CHECK NATS ANTENNA AMP. GROUND LINE CIRCUIT 
    1. Turn ignition switch OFF.
    2. Disconnect NATS antenna amp. connector.
    3. Check continuity between NATS antenna amp. connector M21 terminal 3 and ground.
      1. 3 (B) - Ground: Continuity should exist. 

    OK or NG

    1. OK: NATS antenna amp. is malfunctioning. Ref. part No. E6 
    2. NG:
      • Repair or replace harness.
        NOTE: If harness is OK, replace BCM, perform initialization with CONSULT-II. For initialization, refer to "CONSULT-II Operation Manual NATS-IVIS/NVIS".
    Fig 7: Checking Continuity Between NATS Antenna Amp. Connector M21 Terminal 3 And Ground
    G02385360Courtesy of NISSAN MOTOR CO., U.S.A.
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