Subaru Legacy 2004 Service Manual page 3543

Step
1 CHECK AIRBAG CONTROL MODULE.
1) Turn the ignition switch OFF, disconnect the
battery ground terminal, and wait more than 20
seconds.
2) Disconnect the connector (AB6) from air-
bag control module. <Ref. to AB-20, Airbag
Control Module.>
3) Connect the connector (1U) in the test har-
ness U to connector (AB6).
4) Connect the battery ground terminal and
turn the ignition switch ON.
5) Measure the voltage between connector
(2U) in the test harness U and chassis ground.
Connector & terminal
(2U) No. 1 (+) — Chassis ground (
2 CHECK FUSE NO. 25 (IN JOINT BOX).
1) Confirm that the ignition switch is turned
OFF.
2) Remove the fuse No. 25 (in joint box) and
perform visual inspection.
Diagnostic Chart with Trouble Code
Is the voltage more than 10 V? Replace the airbag
#
):
Is the fuse No. 25 blown out?
AB(diag)-53
AIRBAG SYSTEM (DIAGNOSTICS)
Check Yes
control module.
<Ref. to AB-20,
Airbag Control
Module.>
Replace the fuse
No. 25. If fuse No.
25 is blown out
again, repair the
body harness.
No
Go to step 2.
Repair the body
harness.