Subaru Legacy BN/BS (2015-2019) Service Manual: Airbag warning light remains on

Subaru Legacy BN/BS (2015-2019) Service Manual / Airbag system (diagnostics) / Airbag warning light failure / Airbag warning light remains on

DETECTING CONDITION:

• Airbag warning light is faulty.

• Airbag control module to combination meter circuit is shorted or open.

• Grounding circuit is faulty.

• Airbag control module is faulty.

• Connector connection is improper.

• Connections of (AB6, AB17, AB18) to airbag control module are improper.

CAUTION:

Before performing diagnosis, refer to “CAUTION” in “General Description”. General Description > CAUTION

STEP	CHECK	YES	NO
1.CHECK CAN COMMUNICATION. Inspect LAN system. Basic Diagnostic Procedure > PROCEDURE	Is there any fault-	Repair it according to diagnosis of LAN system.	Airbag Warning Light Failure > AIRBAG WARNING LIGHT REMAINS ON
2.CHECK DTC. 1) Turn the ignition switch to OFF, disconnect the battery ground cable, and wait for 60 seconds or more. 2) Check the connection status of airbag CM connector.	Is there poor contact of connector-	Reconnect the connector. Or repair the connector.	Airbag Warning Light Failure > AIRBAG WARNING LIGHT REMAINS ON
3.CHECK FOR POOR CONTACT. Check the combination meter. Combination Meter System > OPERATION	Is there any fault-	Replace the combination meter. Combination Meter > REMOVAL	Replace the airbag CM. Airbag Control Module > REMOVAL

Airbag warning light failure

...

Airbag warning light remains off

NOTE:For the diagnostic procedure, refer to “AIRBAG WARNING LIGHT REMAINS ON”. Airbag Warning Light Failure > AIRBAG WARNING LIGHT REMAINS ON ...

Other materials:

Dtc b2a0d airbag signal
DIAGNOSIS START CONDITION:When ignition switch is ON.DTC DETECTING CONDITION:Either the regular signal or collision signal cannot be detected from the airbag CM for at least 2 seconds.TROUBLE SYMPTOM:• ACN function does not operate.• RED LED illuminates.WIRING DIAGRAM:NOTE:For the coupli ...