Subaru Legacy 2004 Service Manual page 3599

Step
1 CHECK CURTAIN AIRBAG MODULE.
1) Turn the ignition switch OFF, disconnect the
battery ground terminal, and wait more than 20
seconds.
2) Disconnect the connector (AB33) from
(AB40), and connect the connector (1F) in test
harness F to connector (AB33).
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 RH).
1) Turn the ignition switch OFF, disconnect the
battery ground terminal, and wait more than 20
seconds.
2) Disconnect the connector (AB26) from seat
belt pretensioner (RH). <Ref. to SB-12, Front
Seat Belt.>
3) Disconnect the connector (AB24) from side
airbag module (RH).
4) Disconnect the airbag resistor from the test
harness F.
5) Disconnect the connector (AB18) 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 (AB18).
7) Measure the resistance between connector
(5U) in the test harness U and connector (3F)
in the test harness F.
Connector & terminal
(5U) No. 6 — (3F) No. 3:
(5U) No. 8 — (3F) No. 4:
3 CHECK AIRBAG REAR HARNESS (CUR-
TAIN AIRBAG MODULE HARNESS RH).
Measure the resistance between connector
(5U) terminals in the test harness U.
Connector & terminal
(5U) No. 6 — (5U) No. 8:
4 CHECK AIRBAG REAR HARNESS (CUR-
TAIN AIRBAG MODULE HARNESS RH).
Measure the resistance between the terminals
of connector (3F) in the test harness F.
Connector & terminal
(3F) No. 3 — (3F) No. 4:
5 CHECK AIRBAG REAR HARNESS (CUR-
TAIN AIRBAG MODULE HARNESS RH).
Measure the resistance between connector
(3F) in the test harness F and chassis ground.
Connector & terminal
(3F) No. 3 — Chassis ground:
(3F) No. 4 — Chassis ground:
6 CHECK AIRBAG REAR HARNESS (CUR-
TAIN AIRBAG MODULE HARNESS RH).
Measure the resistance between connector
(5U) in the test harness U and chassis ground.
Connector & terminal
(5U) No. 6 — Chassis ground:
(5U) No. 8 — 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"?
Is the resistance more than 1
M"?
Is the resistance more than 1
M"?
Is the resistance more than 1
M"?
AB(diag)-109
AIRBAG SYSTEM (DIAGNOSTICS)
Check Yes
Replace the cur-
tain airbag mod-
ule (RH). <Ref. to
AB-18, Curtain Air-
bag Module.>
Go to step 3.
Go to step 4.
Go to step 5.
Go to step 6.
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.
Replace the airbag
rear harness with
body harness.
Replace the airbag
rear harness with
body harness.
Replace the airbag
rear harness with
body harness.
Replace the airbag
rear harness with
body harness.