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Home >> Nissan-Datsun >> 2017 >> Sentra S, Standard Trans >> Repair and Diagnosis >> External Pages >> Different car >> Section 104 (Security Control System (With Intelligent Key System) (DTCS)) >> DTC/Circuit Diagnosis >> DTC B2198: NATS Antenna Amp. >> Diagnosis Procedure
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Diagnosis Procedure

WARNING: This page is about a different car, the 2016 Nissan Sentra. However, it is still accessible from the selected car via links, so may be relevant.

Regarding Wiring Diagram information, refer to WIRING DIAGRAM .

  1. CHECK FUSE

    1. Turn power switch OFF.
    2. Check that the following fuse in IPDM E/R is not blown.
      Signal name Fuse No.
      Battery power supply 33 (20 A)

    Is the inspection result normal?

    YES 

    GO TO STEP 2  .

    NO 

    Replace the blown fuse after repairing the cause of blowing.

  2. CHECK NATS ANTENNA AMP. POWER SUPPLY

    1. Disconnect NATS antenna amp. connector.
    2. Check voltage between NATS antenna amp. harness connector and ground.
      (+) (-) Voltage (V)
      (Approx.)
      NATS antenna amp.
      Connector Terminal
      M42 1 Ground Battery voltage

    Is the inspection result normal?

    YES 

    GO TO STEP 4  .

    NO 

    GO TO STEP 3  .

  3. CHECK NATS ANTENNA AMP. POWER SUPPLY CIRCUIT

    1. Disconnect IPDM E/R connector.
    2. Check continuity between IPDM E/R harness connector and NATS antenna amp. connector.
      IPDM E/R NATS antenna amp. Continuity
      Connector Terminal Connector Terminal
      E45 32 M42 1 Yes

    Is the inspection result normal?

    YES 

    Replace IPDM E/R. Refer to REMOVAL AND INSTALLATION .

    NO 

    Repair or replace harness.

  4. CHECK NATS ANTENNA AMP. GROUND CIRCUIT

    Check continuity between NATS antenna amp. harness connector and ground.

    NATS antenna amp. Ground Continuity
    Connector Terminal
    M42 4 Yes

    Is the inspection result normal?

    YES 

    GO TO STEP 5  .

    NO 

    Repair or replace harness.

  5. CHECK NATS ANTENNA AMP. COMMUNICATION SIGNAL 1

    Check voltage signal between NATS antenna amp. harness connector and ground using an oscilloscope.

    (+) (-) Condition Voltage (V)
    (Approx.)
    NATS antenna amp.
    Connector Terminal
    M42 2 Ground Intelligent Key: Intelligent Key battery is removed Brake pedal: Depressed
    NOTE:

    Waveform varies each time when brake pedal is depressed
    GNSJMKIA6232JP-232Courtesy of NISSAN NORTH AMERICA, INC.
    Brake pedal: Not depressed 12

    Is the inspection result normal?

    YES 

    GO TO STEP 7  .

    NO 

    GO TO STEP 6  .

  6. CHECK NATS ANTENNA AMP. OUTPUT SIGNAL CIRCUIT 1

    1. Disconnect BCM connector.
    2. Check continuity between NATS antenna amp. harness connector and BCM connector.
      NATS antenna amp. BCM Continuity
      Connector Terminal Connector Terminal
      M42 2 M84 21 Yes
    3. Check continuity between NATS antenna amp. harness connector and ground.
      NATS antenna amp. Ground Continuity
      Connector Terminal
      M42 2 No

    Is the inspection result normal?

    YES 

    GO TO STEP 9  .

    NO 

    Repair or replace harness.

  7. CHECK NATS ANTENNA AMP. COMMUNICATION SIGNAL 2

    Check voltage signal between NATS antenna amp. harness connector and ground using an oscilloscope.

    (+) (-) Condition Voltage (V)
    (Approx.)
    NATS antenna amp.
    Connector Terminal
    M42 3 Ground During waiting Brake pedal: Depressed
    NOTE:

    Waveform varies each time when brake pedal is depressed
    GNSJMKIA6233JP-233Courtesy of NISSAN NORTH AMERICA, INC.
    Brake pedal: Not depressed 12

    Is the inspection result normal?

    YES 

    Replace NATS antenna amp. Refer to REMOVAL AND INSTALLATION .

    NO 

    GO TO STEP 8  .

  8. CHECK NATS ANTENNA AMP. OUTPUT SIGNAL CIRCUIT 2

    1. Disconnect BCM connector.
    2. Check continuity between NATS antenna amp. harness connector and BCM connector.
      NATS antenna amp. BCM Continuity
      Connector Terminal Connector Terminal
      M42 3 M84 25 Yes
    3. Check continuity between NATS antenna amp. harness connector and ground.
      NATS antenna amp. Ground Continuity
      Connector Terminal
      M42 3 No

    Is the inspection result normal?

    YES 

    GO TO STEP 9  .

    NO 

    Repair or replace harness.

  9. REPLACE BCM

    1. Replace BCM. Refer to REMOVAL AND INSTALLATION .
    2. Perform initialization of BCM and registration of all Intelligent Keys using CONSULT.

    Inspection End

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