Subaru 2009 IMPREZA Service Manual page 2852

Step
1 CHECK AIRBAG HARNESS.
1) Turn the ignition switch to OFF, disconnect
the ground cable from battery, and wait for 20
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.
2 CHECK AIRBAG HARNESS.
1) Turn the ignition switch to OFF.
2) Connect the test harness AG connector
(1AG) 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:
3 CHECK AIRBAG HARNESS.
1) Turn the ignition switch to OFF.
2) Connect the connectors (7AG) and (8AG) in
the test harness AG in the condition of step 2.
3) Turn the ignition switch to ON.
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 (B281) from body
integrated unit.
4) Measure the resistance between connector
(2AG) in the test harness AG and connector
(B281).
Connector & terminal
(2AG) No. 10 — (B281) No. 26:
Diagnostic Chart with Trouble Code
Does the passenger's seat belt
warning light blink for 6 sec-
onds and go off?
Is the resistance 1 M or
more?
Does the passenger's seat belt
warning light blink for 6 sec-
onds, then repeatedly light and
go off?
Is the resistance less than 10 ? Replace the body
AB(diag)-63
AIRBAG SYSTEM (DIAGNOSTICS)
Check Yes
Go to step 3.
Replace the body
integrated unit.
Replace the airbag
control module.
<Ref. to AB-21,
Airbag Control
Module.>
integrated unit.
No
Go to step 2.
Repair the bulk-
head harness. Or
replace the airbag
main harness
along with body
harness.
Go to step 4.
Repair the bulk-
head harness. Or
replace the airbag
main harness
along with body
harness.