Subaru 2009 IMPREZA Service Manual page 2824

Step
2 CHECK POOR CONTACT.
1) Turn the ignition switch to OFF, disconnect
the ground cable from battery, and wait for 20
seconds or more.
2) Confirm that the airbag control module and
the connectors (AB6, AB17, AB18) are securely
connected.
3 CHECK AIRBAG MAIN HARNESS.
1) Remove the instrument panel lower cover
and disconnect the connectors (AB7) and
(AB2).
2) Remove the console front panel and discon-
nect the connectors (AB10) and (AB9).
3) Disconnect the connectors (AB6, AB17,
AB18) from the airbag control module, and con-
nect the test harness AG connector (1AG).
4) Connect the battery ground terminal and
turn the ignition switch to ON.
5) Connect the connectors (7AG) and (8AG) in
the test harness AG.
NOTE:
After the fault has been cleared, disconnect the
connectors (7AG) and (8AG).
4 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:
5 CHECK AIRBAG MAIN HARNESS AND
BULKHEAD HARNESS.
1) Turn the ignition switch to OFF, disconnect
the battery ground terminal, and wait 20 sec-
onds or more.
2) Disconnect the connectors (7AG) and
(8AG).
3) Remove the combination meter.
4) Measure the resistance between the combi-
nation meter connector and test harness AG
connector (2AG).
Connector & terminal
(2AG) No. 5 — (i10) No. 36:
6 CHECK POOR CONTACT OF CONNECTORS
(AB1) AND (B31).
Confirm that there is a firm contact between
connectors (AB1) and (B31).
7 CHECK AIRBAG MAIN HARNESS.
Check the airbag main harness for defect.
Airbag Warning Light Failure
Is there faulty connector con-
tact (AB6, AB17, AB18)?
Does the airbag warning light
go off?
Is the resistance less than 10 ? Replace the airbag
Is the resistance less than 10 ? Check the combi-
Is there poor contact of connec-
tors (AB1) and (B31)?
Is there any defect in the airbag
main harness?
AB(diag)-35
AIRBAG SYSTEM (DIAGNOSTICS)
Check Yes
If the faulty con-
nector contact
remains, replace
the airbag main
harness along with
body harness or
replace the airbag
control module.
<Ref. to AB-21,
Airbag Control
Module.>
Go to step 4.
control module.
<Ref. to AB-21,
Airbag Control
Module.>
nation meter.
Repair the bulk-
head harness or
replace the airbag
main harness
along with body
harness.
Replace the airbag
main harness
along with bulk-
head harness.
No
Go to step 3.
Go to step 5.
Repair the chassis
ground circuit.
Go to step 6.
Go to step 7.
Repair the bulk-
head harness.