Subaru Legacy 2004 Service Manual page 3597

Step
1 CHECK PASSENGER'S AIRBAG MODULE.
1) Turn the ignition switch OFF, disconnect the
battery ground terminal, 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 connector
(2P) and (3P) in the test harness P.
6) Connect the battery ground terminal and
turn the ignition switch ON.
2 CHECK AIRBAG MAIN HARNESS (PASSEN-
GER'S AIRBAG HARNESS).
1) Turn the ignition switch OFF, disconnect the
battery ground terminal, and wait more than 20
seconds.
2) Disconnect the airbag resistor from con-
nector (2P) and (3P) in the test harness P.
3) Remove the instrument panel lower cover,
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. <Ref. to AB-20, Air-
bag Control Module.>
5) Measure the voltage between connector
(2U) in the test harness U and chassis ground.
Connector & terminal
(2U) No. 3 (+) — Chassis ground (
(2U) No. 5 (+) — Chassis ground (
(2U) No. 9 (+) — Chassis ground (
(2U) No. 13 (+) — Chassis ground (
Diagnostic Chart with Trouble Code
Does the airbag warning light
operate properly?
Is the voltage less than 1 V?
#
):
#
):
#
):
#
):
AB(diag)-107
AIRBAG SYSTEM (DIAGNOSTICS)
Check Yes
Replace the pas-
senger airbag
module. <Ref. to
AB-15, Passen-
ger's Airbag Mod-
ule.>
Replace the airbag
control module.
<Ref. to AB-20,
Airbag Control
Module.>
No
Go to step 2.
Replace the airbag
main harness with
body harness.