Subaru Legacy 2002 Service Manual page 3276

DIAGNOSTIC CHART WITH DIAGNOSTIC TROUBLE CODE (DTC)
No.
1 CHECK AIRBAG CONTROL MODULE.
1) Turn the ignition switch OFF, disconnect
the battery ground cable, and wait more than
20 seconds.
2) Disconnect the connector (AB6) from the
airbag control module. <Ref. to AB-17, Airbag
Control Module.>
3) Connect the connector (1I) in test harness I
or I2 to connector (AB6).
4) Connect the battery ground cable and turn
the ignition switch ON.
5) Measure the voltage between connector
(2I) in test harness I or I2 and chassis
ground.
Connector & terminal
(2I) No. 3 (+) — Chassis ground (−):
2 CHECK AIRBAG MAIN HARNESS.
1) While checking control module, turn the
ignition switch OFF and disconnect the bat-
tery ground cable. Wait more than 20 seconds
before operation.
2) Disconnect the airbag connector (AB1)
from the body harness (B31).
3) Connect the connector (2A) in test harness
A to connector (AB1).
4) Measure the resistance between connector
(5A) in test harness A and the connector (2I)
in test harness I or I2.
Connector & terminal
(5A) No. 9 — (2I) No. 3:
3 CHECK AIRBAG MAIN HARNESS.
Measure the following resistance with the
above-mentioned condition maintained.
Connector & terminal
(5A) No. 9 — Chassis ground:
(2I) No. 3 — Chassis ground:
4 CHECK FUSE No. 11 (IN JOINT BOX).
1) Confirm that the ignition switch is turned
OFF.
2) Remove fuse No. 11 (in joint box) and per-
form visual inspection.
Step
Is the voltage more than
10 V?
Is the resistance less than
10 Ω?
Is the resistance more than
1 MΩ?
Is fuse No. 11 blown?
AB-47
Airbag System (Diagnostics)
Check Yes
Replace the air-
bag control mod-
ule. <Ref. to
AB-17, Airbag
Control Module.>
Go to step 3.
Go to step 4.
Replace fuse No.
11. If fuse No. 11
blows again,
repair the body
harness.
No
Go to step 2.
Replace airbag
main harness.
<Ref. to AB-15,
Main Harness.>
Replace airbag
main harness.
<Ref. to AB-15,
Main Harness.>
Repair the body
harness.