Subaru 2009 IMPREZA Service Manual page 2880

AH:DTC 91 CURTAIN AIRBAG MODULE RH FAILURE
DTC DETECTING CONDITION:
• Curtain airbag harness (RH) is faulty.
• Curtain airbag module (RH) is faulty.
• Airbag control module is faulty.
CAUTION:
• Before diagnosing the airbag system, be sure to turn the ignition switch to OFF, disconnect the
ground terminal from battery, and wait 20 seconds or more before starting to work.
• When replacing the airbag module, seat belt pretensioner, roll connector, control module and sen-
sor, reconnect each part and check that the warning light operates properly.
• When inspecting the airbag main harness, disconnect the airbag module connectors of the driver's
and passenger's seats for safety.
• 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:
AB34
CURTAIN AIRBAG
SENSOR RH
(C PILLAR)
Step
1 CHECK POOR CONTACT OF CONNEC-
TORS.
Check for poor contact of the connectors
between the airbag control module, curtain air-
bag module RH and the curtain airbag sensor
RH.
Diagnostic Chart with Trouble Code
AIRBAG CONTROL MODULE
AB28
SIDE AIRBAG CURTAIN AIRBAG
SENSOR RH MODULE RH
(B PILLAR)
Is there poor contact?
AB(diag)-91
AIRBAG SYSTEM (DIAGNOSTICS)
AB18
AB33
Check
AB33
1 2
AB28
AB34
1 2 3 4
AB18
1 2 3 4 5 6 7 8
9 10 11 12 13 14 15 16
17 18 19 20 21 22 23 24
Yes No
Replace the airbag Go to step 2.
rear harness along
with body harness.
AB-02036