Subaru Legacy 2005 Service Manual page 3634

AIRBAG SYSTEM (DIAGNOSTICS)
1. MODEL WITH CURTAIN AIRBAG OR LAP SEAT BELT PRETENSIONER
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 (AB25) from
(AB24), and connect the connector (1F) in test
harness F to connector (AB24).
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 (SIDE
AIRBAG MODULE HARNESS RH).
1) Turn the ignition switch OFF, disconnect the
battery ground cable, and wait more than 20
seconds.
2) Disconnect the connector (AB26) from seat
belt pretensioner (RH).
3) For the model with lap seat belt preten-
sioner, disconnect the connector (AB30) from
lap seat belt pretensioner.
4) Disconnect the connector (AB33) from cur-
tain airbag module (RH).
5) Disconnect the airbag resistor from the test
harness F.
6) Disconnect the connector (AB18) from air-
bag control module.
7) Connect the connector (1U) in the test har-
ness U to connector (AB18).
8) Measure the resistance between connector
(3U) in the test harness U and connector (3F)
in the test harness F.
Connector & terminal
(3U) No. 20 — (3F) No. 4:
(3U) No. 18 — (3F) No. 3:
3 CHECK AIRBAG REAR HARNESS (SIDE
AIRBAG MODULE HARNESS RH).
Measure the resistance between connector
(3U) terminals in the test harness U.
Connector & terminal
(3U) No. 20 — (3U) No. 18:
4 CHECK AIRBAG REAR HARNESS (SIDE
AIRBAG MODULE HARNESS RH).
Measure the resistance between connector
(3U) in the test harness U and chassis ground.
Connector & terminal
(3U) No. 20 — Chassis ground:
(3U) No. 18 — Chassis ground:
Diagnostic Chart with Trouble Code
Does the airbag warning light
illuminate for 6 seconds and go
off?
Is the resistance less than 10
Ω?
Is the resistance more than 1
MΩ?
Is the resistance more than 1
MΩ?
AB(diag)-62
Check
Replace the side
airbag module
(RH). <Ref. to AB-
18, REMOVAL,
Side Airbag Mod-
ule.>
Go to step 3.
Go to step 4.
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.
Replace the airbag
rear harness with
body harness.
Replace the airbag
rear harness with
body harness.