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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 B1003: Airbag Ecu Malfunction

DTC B1003: Airbag Ecu Malfunction

Diagnosis start condition: 

When the ignition voltage is 10 - 16 V.

DTC detecting condition: 

When an internal error occurs in the airbag ECM.

Trouble symptom: 

Airbag warning light illuminates.

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. CHECK DTC  .

    Read the DTC of [Airbag] using the Subaru Select Monitor. Ref. to AIRBAG (DIAGNOSTICS)>DIAGNOSTIC TROUBLE CODE (DTC) .

    Is any of DTC B1003, B1007, B1105, B1106, B1115, B1116, B1117, B1118, B1120, B1121, B1125, B1126, B1145, B1146, B1170, B1185, B1195, B1196 or B1199 displayed? (Current code)

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

    No:  Perform the basic diagnostic procedure. Ref. to AIRBAG (DIAGNOSTICS)>BASIC DIAGNOSTIC PROCEDURE>PROCEDURE .