Subaru 2009 IMPREZA Service Manual page 2889

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AIRBAG SYSTEM (DIAGNOSTICS)

AN:DTC E4 FRONT SENSOR BUS RH COMMUNICATION ERROR

DTC DETECTING CONDITION:

• Open or short circuit in harness of front sensor bus (RH).

• Front sub sensor (RH) is faulty.

• Airbag control module is faulty.

• Before diagnosing the airbag system, be sure to turn the ignition switch to OFF, disconnect the

ground cable 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 and seat belt

pretensioners of the driver's and passenger's seats for safety reasons.

WIRING DIAGRAM:

Diagnostic Chart with Trouble Code

AIRBAG CONTROL MODULE

FRONT SUB SENSOR RH

AB(diag)-100

5 6 7 8 9 10

21 22 23 24 25 26 27 28