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Home >> Subaru >> 2024 >> Impreza Base >> Repair and Diagnosis >> Restraints >> Air Bag, SRS >> Air Bag System (Diagnostics) >> Diagnostic Procedure with Diagnostic Trouble Code (DTC) >> DTC B178C: Vehicle Factory Calibration Uncompleted

DTC B178C: Vehicle Factory Calibration Uncompleted

Diagnosis start condition: 

When the ignition voltage is 10 - 16 V.

DTC detecting condition: 

Trouble symptom: 

Occupant judgment of airbag control module stops.

Failure detection pattern: 

Warning light/indicator light: 

CAUTION: Before performing diagnosis, refer to "CAUTION" in "General Description". Ref. to AIRBAG (DIAGNOSTICS)>GENERAL DESCRIPTION>CAUTION .
  1. PERFORM [Rezeroing]  .
    1. Perform [Rezeroing]. Ref. to AIRBAG SYSTEM>REZERO .
    2. Using the Subaru Select Monitor, perform the clear memory of [Airbag]. Ref. to COMMON (DIAGNOSTICS)>CLEAR MEMORY .
    3. Execute the inspection mode. Ref. to AIRBAG (DIAGNOSTICS)>INSPECTION MODE .
    4. Read the DTC of [Airbag] using the Subaru Select Monitor. Ref. to AIRBAG (DIAGNOSTICS)>DIAGNOSTIC TROUBLE CODE (DTC) .

    Is DTC B178C displayed? (Current code)

    Yes:  Replace the airbag control module. Ref. to AIRBAG SYSTEM>AIRBAG CONTROL MODULE>REMOVAL .

    No:  [Rezeroing] was not performed.