Subaru Legacy 2004 Service Manual page 3582

AIRBAG SYSTEM (DIAGNOSTICS)
2. MODEL WITHOUT CURTAIN AIRBAG
Step
1 CHECK SEAT BELT PRETENSIONER.
1) Turn the ignition switch OFF, disconnect the
battery ground terminal, and wait more than 20
seconds.
2) Disconnect the connector (AB21) from seat
belt pretensioner (LH). <Ref. to SB-12, Front
Seat Belt.>
3) Connect the connector (1N) in the test har-
ness N to the connector (AB21).
4) Connect the airbag resistor to connector
(2N) in the test harness N.
5) Connect the battery ground terminal and
turn the ignition switch ON.
2 CHECK AIRBAG REAR HARNESS (PRE-
TENSIONER HARNESS LH).
1) Turn the ignition switch OFF, disconnect the
battery ground terminal, and wait more than 20
seconds.
2) Disconnect the airbag resistor from test
harness.
3) Disconnect the connectors (AB17) and
(AB18) from airbag control modules. <Ref. to
AB-20, Airbag Control Module.>
4) Connect the connector (1R) in the test har-
ness R to connector (AB17).
5) Measure the resistance between connector
(3R) in the test harness R and connector (2N)
in the test harness N.
Connector & terminal
(3R) No. 13 — (2N) No. 2:
(3R) No. 11 — (2N) No. 1:
3 CHECK AIRBAG REAR HARNESS (PRE-
TENSIONER HARNESS LH).
Measure the resistance between connector
(3R) terminals in the test harness R.
Connector & terminal
(3R) No. 11 — (3R) No. 13:
4 CHECK AIRBAG REAR HARNESS (PRE-
TENSIONER HARNESS LH).
Measure the resistance between connector
(3R) in the test harness R and chassis ground.
Connector & terminal
(3R) No. 11 — Chassis ground:
(3R) 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"?
Is the resistance more than 1
M"?
AB(diag)-92
Check Yes
Replace the seat
belt pretensioner
(LH). <Ref. to SB-
12, Front Seat
Belt.>
Go to step 3.
Go to step 4.
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.