Subaru Legacy 2005 Service Manual page 3618

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AIRBAG SYSTEM (DIAGNOSTICS)
Step
1
CHECK PASSENGER'S AIRBAG MODULE.
1) Turn the ignition switch OFF, disconnect the
battery ground cable, 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 connectors
(2P) and (3P) in the test harness P.
6) Connect the battery ground cable and turn
the ignition switch to ON.
2
CHECK AIRBAG MAIN HARNESS (PASSEN-
GER'S AIRBAG HARNESS).
1) Turn the ignition switch OFF, disconnect the
battery ground cable, and wait more than 20
seconds.
2) Disconnect the airbag resistor from con-
nectors (2P) and (3P) in the test harness P.
3) Remove the instrument panel lower cover
and 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.
5) Measure the resistance between connector
(2U) in the test harness U and connectors (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 connectors
(2U) in the test harness U, and between con-
nector (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
illuminate for 6 seconds and go
off?
Is the resistance less than 10
Ω?
Is the resistance more than 1
MΩ?
AB(diag)-46
Check
Replace the pas-
senger's airbag
module. <Ref. to
AB-17, Passen-
ger's Airbag Mod-
ule.>
Go to step 3.
Replace the airbag
control module.
<Ref. to AB-22,
Airbag Control
Module.>
Yes
No
Go to step 2.
Replace the airbag
main harness with
body harness.
Replace the airbag
main harness with
body harness.

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