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Home >> Infiniti >> 2013 >> EX37 Base, AWD >> Repair and Diagnosis >> Restraints >> Restraints Control Systems >> SRS Airbag Control System >> DTC/Circuit Diagnosis >> DTC B0001: Driver Air Bag Module >> Diagnosis Procedure
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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. CHECK HARNESS CONNECTOR 

    Check the harness connector.

    Is the inspection result normal? 

    YES: GO TO 2.

    NO: Replace harness connector.

  2. CHECK WIRING HARNESS 

    Check the wiring harness externals.

    Is the inspection result normal? 

    YES: GO TO 3.

    NO: Replace wiring harness.

  3. CHECK DTC 

    Perform each inspection according to the displayed DTC.

    Which DTC is displayed? 

    [OPEN]: GO TO 4.

    [VB-SHORT]: GO TO  8.

    [GND-SHORT]: GO TO  5.

    [SHORT]: GO TO  6.

  4. CHECK SPIRAL CABLE CIRCUIT 1 
    1. Turn ignition switch OFF.
    2. Disconnect driver air bag module harness connector and combination switch (spiral cable) harness connector.
    3. Check continuity between driver air bag module harness connector and combination switch (spiral cable) harness connector.
      Driver air bag module Combination switch (spiral cable) Continuity
      Connector Terminal Connector Terminal
      M302 10 M35 28 Existed
      11 30
      M301 9
      12 29

      Is the inspection result normal? 

      YES: GO TO  9.

      NO: Replace combination switch (spiral cable). Refer to "REMOVAL AND INSTALLATION ".

  5. CHECK SPIRAL CABLE CIRCUIT 2 
    1. Turn ignition switch OFF.
    2. Disconnect driver air bag module harness connector and combination switch (spiral cable) harness connector.
    3. Check continuity between driver air bag module harness connector and ground.
      Driver side air bag module Ground Continuity
      Connector Terminal
      M302 10 Not existed
      11
      M301 9
      12

      Is the inspection result normal? 

      YES: GO TO  9.

      NO: Replace combination switch (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 combination switch (spiral cable) harness connector.
    3. Check continuity between combination switch (spiral cable) terminals.
      Combination switch (spiral cable) Continuity
      Connector Terminal
      M302 10 11 Not existed
      M301 9 12

      Is the inspection result normal? 

      YES: GO TO 7.

      NO: Replace combination switch (spiral cable). Refer to "REMOVAL AND INSTALLATION ".

  7. CHECK SPIRAL CABLE CIRCUIT 4 

    Check continuity between combination switch (spiral cable) terminals.

    Combination switch (spiral cable) Continuity
    Connector Terminal
    M35 28 30 Not existed
    29

    Is the inspection result normal? 

    YES: GO TO  9.

    NO: Replace combination switch (spiral cable). Refer to "REMOVAL AND INSTALLATION ".

  8. REPLACE COMBINATION SWITCH (SPIRAL CABLE) 
    1. Replace combination switch (spiral cable). Refer to "REMOVAL AND INSTALLATION ".
    2. Perform DTC confirmation procedure. Refer to "DTC LOGIC ".

      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 LOGIC ".

      Is DTC detected? 

      YES: GO TO 10.

      NO: INSPECTION END

  10. 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 LOGIC ".

      Is DTC detected? 

      YES: GO TO  1.

      NO: INSPECTION END

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