Subaru Legacy 2005 Service Manual page 3688

AIRBAG SYSTEM (DIAGNOSTICS)
Step
1 CHECK SIDE AIRBAG MODULE.
1) Turn the ignition switch OFF, disconnect the
battery ground cable, and wait more than 20
seconds.
2) Disconnect the connector (AB31) from
(AB39), and connect the connector (1F) in test
harness F to connector (AB31).
3) Connect the airbag resistor to connector
(3F) in the test harness F.
4) Connect the battery ground cable and turn
the ignition switch to ON.
2 CHECK AIRBAG REAR HARNESS (CUR-
TAIN AIRBAG MODULE HARNESS LH).
1) Turn the ignition switch OFF, disconnect the
battery ground cable, and wait more than 20
seconds.
2) Disconnect the connector (AB21) from seat
belt pretensioner (LH).
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.
6) Connect the connector (1U) in the test har-
ness U to connector (AB17).
7) Connect the battery ground cable and turn
the ignition switch to 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
illuminate for 6 seconds and go
off?
Is the voltage less than 1 V?
−
):
−
):
AB(diag)-116
Check
Replace the cur-
tain airbag mod-
ule (LH). <Ref. to
AB-20, Curtain Air-
bag Module.>
Replace the airbag
control module.
<Ref. to AB-22,
Airbag Control
Module.>
Yes No
Go to step 2.
Replace the airbag
rear harness with
body harness.