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Home >> Nissan-Datsun >> 2021 >> NV2500 HD S >> Repair and Diagnosis >> External Pages >> Different car >> Section 232 (SRS Airbag Control System (DTCS)) >> DTC/Circuit Diagnosis >> DTC B0001: Driver Airbag Module >> Diagnosis Procedure

Diagnosis Procedure

WARNING: This page is about a different car, the 2018 Nissan Titan XD and 2018 Nissan Titan. However, it is still accessible from the selected car via links, so may be relevant.
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 sensor 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. CONFIRM DTC 

    SYMBOL CONSULT

    1. Reconnect all harness connectors.
    2. Turn ignition switch ON.
    3. Check DTC.

    Is DTC still current?

    YES

    GO TO 3.

    NO

    Refer to Intermittent Incident .

  3. 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

    NO

    Replace the harness.

  4. CHECK SPIRAL CABLE CIRCUIT 
    1. Turn ignition switch OFF.
    2. Disconnect driver air bag module harness connectors and spiral cable harness connector.
    3. Check continuity between driver air bag module harness connector and spiral cable connector.

      Driver air bag module

      Spiral cable

      Continuity

      Connector

      Terminal

      Connector

      Terminal

      M100

      23

      M29

      6

      Yes

      24

      4
    4. Check continuity between driver air bag module harness connector and ground.

      Driver air bag module

      Ground

      Continuity

      Connector

      Terminal

      M100

      23

      No

      24

    Is the inspection result normal?

    YES

    GO TO 5 .

    NO

    Replace the spiral cable. Refer to Removal and Installation .

  5. CONFIRM DTC 
    1. Reconnect all harness connectors.
    2. Turn ignition switch ON.
    3. Check for DTC using CONSULT.

    Is DTC still current?

    YES

    GO TO 6.

    NO

    Refer to Intermittent Incident .

  6. DRIVER AIR BAG MODULE 

    SYMBOL CONSULT

    1. Replace the driver air bag module. Refer to Removal and Installation .
    2. Turn ignition switch ON.
    3. Check DTC.

    Is DTC still current?

    YES

    GO TO 8.

    NO

    Clear DTC. Inspection End.

  7. AIR BAG DIAGNOSIS SENSOR UNIT 

    SYMBOL CONSULT

    1. Replace the air bag diagnosis sensor unit. Refer to Removal and Installation .
    2. Turn ignition switch ON.
    3. Check DTC.

    Is DTC still current?

    YES

    GO TO 8.

    NO

    Clear DTC. Inspection End.

  8. RELATED HARNESS 

    Replace the related harness.

    Inspection End.

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