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Subaru Crosstrek Service Manual: Dtc b16f1 passenger s seat belt warning failure

AIRBAG SYSTEM (DIAGNOSTICS) > Diagnostic Chart with Trouble Code

DTC B16F1 PASSENGER’S SEAT BELT WARNING FAILURE

Diagnosis start condition:

Ignition voltage is 10 V to 16 V.

DTC detecting condition:

Airbag control module is faulty.

Meter is faulty.

Harness circuits between meter and airbag control module are open, shorted or shorted to ground.

CAUTION:

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

Wiring diagram:

Airbag system Airbag System > WIRING DIAGRAM">

STEPCHECKYESNO

1.CHECK AIRBAG HARNESS.

1) Turn the ignition switch to OFF, disconnect the battery ground cable, and wait for 60 seconds or more.

2) Disconnect the connectors (AB6, AB17, AB18) from airbag control module.

3) 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?

Diagnostic Chart with Trouble Code > DTC B16F1 PASSENGER’S SEAT BELT WARNING FAILURE">Go to Step 3.

Diagnostic Chart with Trouble Code > DTC B16F1 PASSENGER’S SEAT BELT WARNING FAILURE">Go to Step 2.

2.CHECK AIRBAG HARNESS.

1) Turn the ignition switch to OFF.

2) Connect the connector (1AG) in the test harness AG to the connectors (AB6, AB17, AB18).

3) 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 M? or more?

Replace the meter. Combination Meter > REMOVAL">

Repair the bulkhead harness and instrument panel harness. Or replace the airbag main harness along with body harness.

3.CHECK AIRBAG HARNESS.

1) Turn the ignition switch to OFF.

2) Connect the connector (1AG) in the test harness AG to the connectors (AB6, AB17, AB18).

3) Connect the connectors (7AG) and (8AG) in the test harness AG.

4) 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. Airbag Control Module">

Diagnostic Chart with Trouble Code > DTC B16F1 PASSENGER’S SEAT BELT WARNING FAILURE">Go to Step 4.

4.CHECK AIRBAG HARNESS.

1) Turn the ignition switch to OFF.

2) Disconnect the connectors (7AG) and (8AG) in the test harness AG in the condition of step 3.

3) Disconnect the connector (i10) from meter.

4) Measure the resistance between connector (2AG) in the test harness AG and connector (i10).

Connector & terminal

(2AG) No. 10 — (i10) No. 16:

Is the resistance less than 10 ??

Replace the meter. Combination Meter > REMOVAL">

Repair the bulkhead harness and instrument panel harness. Or replace the airbag main harness along with body harness.

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