Subaru Legacy 2005 Service Manual page 3651

Diagnostic Chart with Trouble Code
AIRBAG SYSTEM (DIAGNOSTICS)
T: DTC 53 SIDE AIRBAG SENSOR RH FAILURE
DTC DETECTING CONDITION:
Side airbag sensor (RH) is faulty.
If DTC 53 is displayed, the circuit within the side airbag sensor (RH) is faulty. Replace the side airbag sensor
(RH). <Ref. to AB-23, Side Airbag Sensor.>
U: DTC 54 SIDE AIRBAG SENSOR LH FAILURE
DTC DETECTING CONDITION:
Side airbag sensor (LH) is faulty.
If DTC 54 is displayed, the circuit within the side airbag sensor (LH) is faulty. Replace the side airbag sensor
(LH). <Ref. to AB-23, Side Airbag Sensor.>
V: DTC 55 SIDE CURTAIN AIRBAG FIRING OUTPUT
This code is displayed when the side airbag module and curtain airbag module are deployed.
Once this code is displayed, the memory cannot be erased. Replace the following parts.
• Airbag control module <Ref. to AB-22, Airbag Control Module.>
• Front seat with side airbag module (Operating side) <Ref. to SE-7, Front Seat.>
• Side airbag sensor (Operating side) <Ref. to AB-23, Side Airbag Sensor.>
• Curtain airbag module (Operating side) <Ref. to AB-20, Curtain Airbag Module.>
• Curtain airbag sensor (Operating side) <Ref. to AB-24, Curtain Airbag Sensor.>
AB(diag)-79