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Home >> Nissan-Datsun >> 2014 >> Sentra SL >> Repair and Diagnosis >> Restraints >> Restraints Control Systems >> SRS Airbag Control System >> DTC/Circuit Diagnosis >> DTC B0002: Driver Air Bag Module >> Diagnosis Procedure

Diagnosis Procedure

WARNING:
  • Before servicing, turn ignition switch OFF, disconnect battery negative terminal, and wait at least 3 minutes or more. (To discharge backup capacitor.)
  • Never use unspecified tester or other measuring device.
  1. HARNESS CONNECTOR 

    Visually inspect all applicable harness connectors for the following:

    • Visible damage to connector or terminal
    • Loose terminal
    • Poor connection
      NOTE: All harness connectors should be inspected from the air bag diagnosis unit to the end component (including any in-line connectors).

      Is the inspection result normal? 

      YES: GO TO 2

      NO: Perform one of the following repairs:

      • Visible damage: Replace the harness.
      • Loose terminal: Secure the terminal.
      • Poor connection: Secure the connection.
  2. WIRING HARNESS 

    Check the wiring harness for visible damage.

    NOTE: The entire wiring harness should be inspected from the air bag diagnosis sensor unit to the end component (including any in-line connectors).

    Is the inspection result normal? 

    YES: GO TO 3

    NO: Replace the harness.

  3. CHECK DTC 

    Perform each inspection according to the displayed DTC.

    Which DTC is displayed? 

    [B0002-13]: GO TO 4.

    [B0002-12]: GO TO  7.

    [B0002-11]: GO TO  5.

    [B0002-00, B0002-09, B0002-1A]: GO TO  6.

  4. CHECK SPIRAL CABLE CIRCUIT 1 
    1. Turn ignition switch OFF.
    2. Disconnect driver air bag module connector and spiral cable harness connector.
    3. Check continuity between driver air bag module harness and spiral cable connector.
      Driver air bag module Spiral cable Continuity
      Connector Terminal Connector Terminal
      M55 9 M30 30 Yes
      12 29

      Is the inspection result normal? 

      YES: GO TO  9.

      NO: Replace spiral cable. Refer to "REMOVAL AND INSTALLATION ".

  5. CHECK SPIRAL CABLE CIRCUIT 2 
    1. Turn ignition switch OFF.
    2. Disconnect driver air bag module connector and combination switch (spiral cable) connector.
    3. Check continuity between spiral cable terminal and ground.
      Spiral cable Ground Continuity
      Connector Terminal
      M30 29 No
      30

      Is the inspection result normal? 

      YES: GO TO  8.

      NO: Replace spiral cable. Refer to "REMOVAL AND INSTALLATION ".

  6. CHECK SPIRAL CABLE CIRCUIT 3 
    1. Turn ignition switch OFF.
    2. Disconnect driver air bag module harness connector and spiral cable harness connector.
    3. Check continuity between spiral cable terminals.
      Spiral Cable Continuity
      Terminal
      29 30 No

      Is the inspection result normal? 

      YES: GO TO  8.

      NO: Replace spiral cable. Refer to "REMOVAL AND INSTALLATION ".

  7. REPLACE SPIRAL CABLE 
    1. Replace spiral cable. Refer to "REMOVAL AND INSTALLATION ".
    2. Perform DTC confirmation procedure. Refer to "DTC DESCRIPTION ".

      Is DTC detected? 

      YES: GO TO 8.

      NO: Inspection End.

  8. REPLACE AIR BAG DIAGNOSIS SENSOR UNIT 
    1. Replace air bag diagnosis sensor unit. Refer to "REMOVAL AND INSTALLATION ".
    2. Perform DTC confirmation procedure. Refer to "DTC DESCRIPTION ".

      Is DTC detected? 

      YES: GO TO 9.

      NO: Inspection End.

  9. REPLACE DRIVER AIR BAG MODULE 
    1. Replace driver air bag module. Refer to "REMOVAL AND INSTALLATION ".
    2. Perform DTC confirmation procedure. Refer to "DTC DESCRIPTION ".

      Is DTC detected? 

      YES: GO TO  1.

      NO: Inspection End.

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