Subaru Legacy 2004 Service Manual page 3535

Step
1 CHECK PASSENGER'S AIRBAG MODULE.
1) Turn the ignition switch OFF, disconnect the
battery ground terminal, and wait more than 20
seconds.
2) Remove the instrument panel side cover on
the passenger's side.
3) Disconnect the connector (AB10) from
(AB9).
4) Connect the connector (1P) in the test har-
ness P to connector (AB9).
5) Connect the airbag resistor to connector
(2P) and (3P) in the test harness P.
6) Connect the battery ground terminal and
turn the ignition switch ON.
2 CHECK AIRBAG MAIN HARNESS (PASSEN-
GER'S AIRBAG HARNESS).
1) Turn the ignition switch OFF, disconnect the
battery ground terminal, and wait more than 20
seconds.
2) Disconnect the airbag resistor from con-
nector (2P) and (3P) in the test harness P.
3) Remove the instrument panel lower cover,
disconnect the connector (AB7) from (AB2).
4) Disconnect the connector (AB6) from air-
bag control module, and connect the connector
(1U) in the test harness U. <Ref. to AB-20, Air-
bag Control Module.>
5) Measure the resistance between connector
(2U) in the test harness U and connector (2P)
and (3P) in the test harness P.
Connector & terminal
(2U) No. 3 — (2P) No. 1:
(2U) No. 5 — (2P) No. 2:
(2U) No. 9 — (3P) No. 3:
(2U) No. 13 — (3P) No. 4:
3 CHECK AIRBAG MAIN HARNESS (PASSEN-
GER'S AIRBAG HARNESS).
Measure the resistance between connector
(2U) terminals in the test harness U and
between the connector (2U) and chassis
ground.
Connector & terminal
(2U) No. 3 — (2U) No. 5:
(2U) No. 3 — Chassis ground:
(2U) No. 5 — Chassis ground:
(2U) No. 9 — (2U) No. 13:
(2U) No. 9 — Chassis ground:
(2U) No. 13 — Chassis ground:
Diagnostic Chart with Trouble Code
Does the airbag warning light
operate properly?
Is the resistance less than 10
"?
Is the resistance more than 1
M"?
AB(diag)-45
AIRBAG SYSTEM (DIAGNOSTICS)
Check Yes
Replace the pas-
senger's airbag
module. <Ref. to
AB-15, Passen-
ger's Airbag Mod-
ule.>
Go to step 3.
Replace the airbag
control module.
<Ref. to AB-20,
Airbag Control
Module.>
No
Go to step 2.
Replace the airbag
main harness with
body harness.
Replace the airbag
main harness with
body harness.