Subaru Legacy 2004 Service Manual page 3541

G: DTC 23
DTC DETECTING CONDITION:
(AB6), (AB17) and (AB18) are not connected properly to airbag control module.
CAUTION:
Before diagnosing the airbag system, be sure to turn the ignition switch OFF, disconnect the ground
terminal from battery, and wait more than 20 seconds before starting to work.
Step
1 CHECK POOR CONTACT IN CONNECTORS
(AB6), (AB17) AND (AB18).
1) Turn the ignition switch OFF, disconnect the
battery ground terminal, and wait more than 20
seconds.
2) Disconnect the connectors (AB6), (AB17)
and (AB18) from airbag control modules. <Ref.
to AB-20, Airbag Control Module.>
2 CHECK POOR CONTACT IN CONNECTORS
(AB6), (AB17) AND (AB18).
1) Ensure that the connectors are firmly
reconnected.
2) Connect the battery ground terminal and
turn the ignition switch ON.
Diagnostic Chart with Trouble Code
Is there rust or damage on the
harness connector and the
control module connector?
Does the airbag warning light
operate properly?
AB(diag)-51
AIRBAG SYSTEM (DIAGNOSTICS)
Check Yes
Replace the airbag
control module.
<Ref. to AB-20,
Airbag Control
Module.> Replace
the body harness
with airbag main
harness. Replace
the body harness
with side airbag
harness.
Finish the diagno-
sis.
No
Go to step 2.
Replace the airbag
control module.
<Ref. to AB-20,
Airbag Control
Module.>