Subaru Legacy 2004 Service Manual page 3573

W: DTC 56
DTC DETECTING CONDITION:
• Curtain airbag sensor (RH) is faulty.
• Curtain airbag harness (RH) is faulty.
• Airbag control module is faulty.
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.
• Before replacing the airbag module, seat belt pretensioner, roll connector, control module and
sensor, reconnect each part and confirm that the warning light operates properly.
• When inspecting the airbag main harness, disconnect the airbag module connector of the driver's
and passenger's seats for safety reasons.
• When inspecting the airbag rear harness, disconnect the side airbag module connector, curtain
airbag module connector and seat belt pretensioner connector for safety reasons.
WIRING DIAGRAM:
AB33 AB34
1 2
1 2 3 4
Diagnostic Chart with Trouble Code
AB18 AIRBAG CONTROL MODULE
AB34
CURTAIN AIRBAG
SENSOR RH
AB18
1 2 3 4
5 6 7 8 9 10 11 12
13 14 15 16 17 18 19 20
AB(diag)-83
AIRBAG SYSTEM (DIAGNOSTICS)
AB33
AB40
INFLATOR
(CURTAIN RH)
AB-00671