Subaru 2009 IMPREZA Service Manual page 2896

Step
1 CHECK POOR CONTACT OF CONNEC-
TORS.
Check for poor contact of the connectors
(AB18, AB28, AB34) between the airbag control
module and the curtain airbag sensor (RH).
2 CHECK AIRBAG REAR HARNESS (BE-
TWEEN AIRBAG CONTROL MODULE AND
SIDE AIRBAG SENSOR RH).
1) Turn the ignition switch to OFF, disconnect
the ground cable from battery, and wait for 20
seconds or more.
2) Disconnect the connector (AB26) from seat
belt pretensioner (RH).
3) Disconnect the connector (AB33) from cur-
tain airbag module (RH).
4) Disconnect connectors (AB25) and (AB24)
from side airbag module (RH).
5) Disconnect the connectors (AB17, AB6,
AB18) from airbag control module.
6) Connect the connector (1AG) in the test har-
ness AG to the connectors (AB17, AB6, AB18).
7) Disconnect the connector (AB28) from side
airbag sensor (RH), and connect the connector
(2V) in test harness V to connector (AB28).
8) Measure the resistance between connector
(5AG) in the test harness AG and connector
(3V) in the test harness V.
Connector & terminal
(5AG) No. 16 — (3V) No. 2:
(5AG) No. 14 — (3V) No. 1:
3 CHECK AIRBAG REAR HARNESS (BE-
TWEEN AIRBAG CONTROL MODULE AND
SIDE AIRBAG SENSOR RH).
Measure the resistance between connector
(5AG) in the test harness AG and chassis
ground, and the resistance between connector
(5AG) terminals in the test harness AG.
Connector & terminal
(5AG) No. 16 — Chassis ground:
(5AG) No. 14 — Chassis ground:
(5AG) No. 16 — (5AG) No. 14:
Diagnostic Chart with Trouble Code
Is there poor contact?
Is the resistance less than 10 ? Go to step 3.
Is the resistance 1 M or
more?
AB(diag)-107
AIRBAG SYSTEM (DIAGNOSTICS)
Check Yes
Replace the airbag
rear harness along
with body harness.
Go to step 4.
No
Go to step 2.
Replace the airbag
rear harness along
with body harness.
Replace the airbag
rear harness along
with body harness.