Subaru Legacy 2004 Service Manual page 3605

Step
1 CHECK SIDE AIRBAG MODULE.
1) Turn the ignition switch OFF, disconnect the
battery ground terminal, and wait more than 20
seconds.
2) Disconnect the connector (AB31) from
(AB39), and connect the connector (1F) in test
harness F to the connector (AB31).
3) Connect the airbag resistor to connector
(3F) in the test harness F.
4) Connect the battery ground terminal and
turn the ignition switch ON.
2 CHECK AIRBAG REAR HARNESS (CUR-
TAIN AIRBAG MODULE HARNESS LH).
1) Turn the ignition switch OFF, disconnect the
battery ground terminal, and wait more than 20
seconds.
2) Disconnect the connector (AB21) from seat
belt pretensioner (LH). <Ref. to SB-12, Front
Seat Belt.>
3) Disconnect the connector (AB19) from side
airbag module (LH).
4) Disconnect the airbag resistor from the test
harness F.
5) Disconnect the connector (AB17) from air-
bag control module. <Ref. to AB-20, Airbag
Control Module.>
6) Connect the connector (1U) in the test har-
ness U to connector (AB17).
7) Connect the battery ground terminal and
turn the ignition switch ON.
8) Measure the voltage between connector
(5U) in the test harness U and chassis ground.
Connector & terminal
(5U) No. 1 (+) — Chassis ground (
(5U) No. 3 (+) — Chassis ground (
Diagnostic Chart with Trouble Code
Does the airbag warning light
operate properly?
Is the voltage less than 1 V?
#
):
#
):
AB(diag)-115
AIRBAG SYSTEM (DIAGNOSTICS)
Check Yes
Replace the cur-
tain airbag mod-
ule (LH). <Ref. to
AB-18, Curtain Air-
bag Module.>
Replace the airbag
control module.
<Ref. to AB-20,
Airbag Control
Module.>
No
Go to step 2.
Replace the airbag
rear harness with
body harness.