Airbag Warning Light Remains On: Wiring Diagram

WARNING: This page is about a different car, the 2012 Subaru Forester. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Airbag Warning Light Remains ON - Wiring Diagram

Courtesy of SUBARU OF AMERICA, INC.

DIAGNOSTIC PROCEDURE CHART

Step	Check	Yes	No
1 READ DTC. Read the DTC. < Ref. to OPERATION , Read Diagnostic Trouble Code (DTC). >	Is DTC displayed?	Go to step 2 .	Go to step 3 .
2 CHECK DTC.	Is the displayed DTC 2D?	Go to step 3 .	Perform the diagnosis according to DTC.
3 CHECK FOR POOR CONTACT. Turn the ignition switch to OFF, disconnect the battery ground cable, and wait for 60 seconds or more. Check that the airbag control module and the connectors (AB6, AB17, AB18) are securely connected.	Are there poor contact of connectors (AB6, AB17, AB18)?	If the faulty connector contact remains, replace the airbag main harness along with body harness or replace the airbag control module. < Ref. to AIRBAG CONTROL MODULE . >	Go to step 4 .
4 CHECK AIRBAG MAIN HARNESS. Remove the instrument panel lower cover and disconnect the connectors (AB7) and (AB2). Remove the console front panel and disconnect the connector (AB9). Disconnect the connectors (AB6, AB17, AB18) from the airbag control module, and connect the connector (1AG) in the test harness AG. Connect the battery ground terminal and turn the ignition switch to ON. Connect the connectors (7AG) and (8AG) in the test harness AG. NOTE: After the fault has been cleared, disconnect the connectors (7AG) and (8AG).	Does the airbag warning light go off?	Go to step 5 .	Go to step 6 .
5 CHECK GROUND CIRCUIT. Measure the resistance between connector (2AG) in the test harness AG and chassis ground. Connector & terminal (2AG) No. 4 - Chassis ground: (2AG) No. 3 - Chassis ground:	Is the resistance less than 10 Ω?	Replace the airbag control module. < Ref. to AIRBAG CONTROL MODULE . >	Repair the chassis ground circuit.
6 CHECK AIRBAG MAIN HARNESS AND BULKHEAD HARNESS. Turn the ignition switch to OFF, disconnect the battery ground cable, and wait for 60 seconds or more. Disconnect the connectors (7AG) and (8AG). Remove the combination meter. Measure the resistance between the combination meter connector and test harness AG connector (2AG). Connector & terminal (2AG) No. 5 - (HO) No. 36:	Is the resistance less than 10 Ω?	Check the combination meter.	Go to step 7 .
7 CHECK POOR CONTACT OF CONNECTOR. Turn the ignition switch to OFF, disconnect the battery ground terminal, and wait 60 seconds or more. Confirm that the connectors between the airbag control module and the combination meter are securely connected.	Is there poor contact of connector?	Repair the bulkhead harness or replace the airbag main harness along with body harness.	Go to step 8 .
8 CHECK AIRBAG MAIN HARNESS. Check the airbag main harness for defect.	Is there any defect in the airbag main harness?	Replace the airbag main harness along with bulkhead harness.	Repair the bulkhead harness.