Subaru Legacy 2003 Service Manual page 3628

DIAGNOSTIC CHART WITH DIAGNOSTIC TROUBLE CODE (DTC)
Step
1 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.
Is fuse No.11 blown?
2 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, Air-
bag Control Module.>
3) Connect the connector (1I) in test harness
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 I2 and chassis ground.
Connector & terminal
(2I) No. 3 (+) — Chassis ground ( − − − − ):
Does the measured value exceed the spec-
ified value?
3 CHECK BODY MAIN HARNESS.
1) While checking control module, turn the
ignition switch OFF and disconnect the bat-
tery ground cable. Wait more than 20 sec-
onds before operation.
2) Disconnect the airbag connector (AB1)
from the body harness (B31).
3) Measure the voltage between the connec-
tor (B31) and the chassis ground.
Connector & terminal
(B31) No. 12 (+) — Chassis ground ( − − − − ):
Does the measured value exceed the spec-
ified value?
Value
Fuse No. 11 is not blown.
10 V
10 V
AB-45
AIRBAG SYSTEM (DIAGNOSTICS)
Yes
Go to step 2. Replace fuse No.
11. If fuse No. 11
blows again, repair
the body harness.
Replace the airbag Go to step 3.
control module.
<Ref. to AB-17,
Airbag Control
Module.>
Replace airbag Repair the body
main harness. harness.
<Ref. to AB-15,
Main Harness.>
No