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Home >> Infiniti >> 2021 >> Q50 Pure, AWD >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Collision/Avoidance >> Driver Assistance System (DTCS) (2 Of 2) >> BSW/Buzzer (Driver Assistance Buzzer Control Module) >> DTC C1B20: Control Module >> DTC Diagnosis Procedure >> With Blind Spot Warning System
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With Blind Spot Warning System

  1. CHECK SELF-DIAGNOSIS RESULTS 

    Check if any DTC other than "C1B20" is detected in "Self Diagnostic Result" of "BSW/BUZZER".

    Is any DTC detected?

    YES

    diagnosis on the detected DTC and repair or replace the malfunctioning parts. Refer to DTC Index .

    NO

    GO TO 2.

  2. CHECK DRIVER ASSISTANCE BUZZER SIGNAL CIRCUIT FOR OPEN 
    1. Turn ignition switch OFF.
    2. Disconnect the driver assistance buzzer connector.
    3. Disconnect the driver assistance buzzer control module connector.
    4. Check continuity between the driver assistance buzzer control module harness connector and driver assistance buzzer harness connector.

      Driver assistance buzzer control module

      Driver assistance buzzer

      Continuity

      Connector

      Terminal

      Connector

      Terminal

      M56

      8

      M107

      1

      Existed

      16

      2

    Is the inspection result normal?

    YES

    GO TO 3.

    NO

    Repair the harnesses or connectors.

  3. CHECK DRIVER ASSISTANCE BUZZER SIGNAL CIRCUIT FOR SHORT 

    Check continuity between the driver assistance buzzer control module harness connector and ground.

    Driver assistance buzzer control module

    Ground

    Continuity

    Connector

    Terminal

    M56

    8

    Not existed

    16

    Is the inspection result normal?

    YES

    GO TO 4.

    NO

    Repair the harnesses or connectors.

  4. CHECK DRIVER ASSISTANCE BUZZER 

    Check driver assistance buzzer. Refer to Component Inspection .

    Is the inspection result normal?

    YES

    Replace the driver assistance buzzer control module. Refer to DRIVER ASSISTANCE BUZZER CONTROL MODULE : Removal & Installation .

    NO

    Replace the driver assistance buzzer. Refer to DRIVER ASSISTANCE BUZZER : Removal & Installation .