DTC B16F1 Passenger's Seat Belt Warning Failure: Wiring Diagram

See appropriate SYSTEM WIRING DIAGRAM article.

Fig 1: Airbag System - Wiring Diagram (Passenger's Seat Belt Warning Failure)

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Courtesy of SUBARU OF AMERICA, INC.

DIAGNOSTIC PROCEDURE

Step	Check	Yes	No
1 CHECK AIRBAG HARNESS. Turn the ignition switch to OFF, disconnect the battery ground cable, and wait for 60 seconds or more. Disconnect the connectors (AB6, AB17, AB18) from airbag control module. Connect the battery ground terminal and turn the ignition switch to ON.	Does the passenger's seat belt warning light blink for 6 seconds and go off?	Go to step 3 .	Go to step 2 .
2 CHECK AIRBAG HARNESS. Turn the ignition switch to OFF. Connect the connector (1AG) in the test harness AG to the connectors (AB6, AB17, AB18). NOTE: For sedan models, connect test harness AH between the connectors (AB6, AB17, AB18) and (1AG). Measure the resistance between connector (2AG) in the test harness AG and chassis ground. Connector & terminal (2AG) No. 10 - Chassis ground:	Is the resistance 1 MΩ or more?	Replace the body integrated unit.	Repair the bulkhead harness and instrument panel harness. Or replace the airbag main harness along with body harness.
3 CHECK AIRBAG HARNESS. Turn the ignition switch to OFF. Connect the connector (1AG) in the test harness AG to the connectors (AB6, AB17, AB18). NOTE: For sedan models, connect test harness AH between the connectors (AB6, AB17, AB18) and (1AG). Connect the connectors (7AG) and (8AG) in the test harness AG. Turn the ignition switch to ON.	Does the passenger's seat belt warning light blink for 6 seconds, then repeatedly light and go off?	Replace the airbag control module. Refer to AIRBAG CONTROL MODULE .	Go to step 4 .
4 CHECK AIRBAG HARNESS. Turn the ignition switch to OFF. Disconnect the connectors (7AG) and (8AG) in the test harness AG in the condition of step 3. Disconnect the connector (i10) from meter. Measure the resistance between connector (2AG) in the test harness AG and connector (i84). Connector & terminal (2AG) No. 10 - (i84) No. 29:	Is the resistance less than 10 Ω?	Replace the body integrated unit.	Repair the bulkhead harness and instrument panel harness. Or replace the airbag main harness along with body harness.