Subaru 2009 IMPREZA Service Manual page 2904

Step
2 CHECK AIRBAG REAR HARNESS (BE-
TWEEN AIRBAG CONTROL MODULE AND
SIDE AIRBAG SENSOR LH).
1) Turn the ignition switch to OFF, disconnect
the ground cable from battery, and wait for 20
seconds or more.
2) Disconnect the connector (AB21) from seat
belt pretensioner (LH).
3) Disconnect the connector (AB31) from cur-
tain airbag module (LH).
4) Disconnect connectors (AB19) and (AB20)
from side airbag module (LH).
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 (AB23) from side
airbag sensor (LH), and connect the connector
(2V) in test harness V to connector (AB23).
8) Measure the resistance between connector
(5AG) in the test harness AG and connector
(3V) in the test harness V.
Connector & terminal
(5AG) No. 10 — (3V) No. 1:
(5AG) No. 8 — (3V) No. 2:
3 CHECK AIRBAG REAR HARNESS (BE-
TWEEN AIRBAG CONTROL MODULE AND
SIDE AIRBAG SENSOR LH).
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. 10 — Chassis ground:
(5AG) No. 8 — Chassis ground:
(5AG) No. 10 — (5AG) No. 8:
4 CHECK AIRBAG REAR HARNESS (BE-
TWEEN SIDE AIRBAG SENSOR LH AND
CURTAIN AIRBAG SENSOR LH).
1) Disconnect the connector (2V) in the test
harness V from the connector (AB23) of side
airbag sensor (LH).
2) Connect the connector (AB23) of side air-
bag sensor (LH) and the connector (1AI) in the
test harness AI.
3) Connect the connector (2AI) in the test har-
ness AI and the connector (1V) in the test har-
ness V.
4) Disconnect the connector (AB32) from cur-
tain airbag sensor (LH), and connect the con-
nector (2V) in test harness V to connector
(AB32).
5) Measure the resistance between connector
(3V) terminals in the test harness V.
Connector & terminal
(3V) No. 2 — (3V) No. 6:
(3V) No. 1 — (3V) No. 7:
Diagnostic Chart with Trouble Code
Is the resistance less than 10 ? Go to step 3.
Is the resistance 1 M or
more?
Is the resistance less than 10 ? Go to step 5.
AB(diag)-115
AIRBAG SYSTEM (DIAGNOSTICS)
Check Yes
Go to step 4.
No
Replace the airbag
rear harness along
with body harness.
Replace the airbag
rear harness along
with body harness.
Replace the airbag
rear harness along
with body harness.