Subaru Impreza 2002 Service Manual page 3324

Step
1 CHECK DRIVER'S AIRBAG MODULE.
1)Turn the ignition switch to OFF, disconnect
the battery ground cable, and wait more than
20 seconds.
2)Remove the driver's airbag module. <Ref. to
AB-12, Driver's Airbag Module.>
3)Connect the connector (AB7) to connector
(1F) in test harness F.
4)Connect the airbag resistor to connector (3F)
in test harness F.
5)Connect the battery ground cable and turn
the ignition switch to ON.
2 CHECK ROLL CONNECTOR.
1)Turn the ignition switch to OFF, disconnect
the battery ground cable, and wait more than
20 seconds.
2)Disconnect the test harness F from the con-
nector (AB7).
3)Remove the lower cover panel and discon-
nect the connector (AB3) from (AB8).
4)Connect the connector (1F) in test harness F
to connector (AB8).
5)Connect the airbag resistor to connector (3F)
in test harness F.
6)Connect the battery ground cable and turn
the ignition switch to ON.
3 CHECK AIRBAG MAIN HARNESS.
1)Turn the ignition switch to OFF, disconnect
the battery ground cable, and wait more than
20 seconds.
2)Disconnect the airbag resistor from the con-
nector (3F) in test harness F.
3)Remove the glove box, and disconnect the
connectors (AB10) and (AB9).
4)Disconnect the connector (AB6) from the air-
bag control module, and connect the connector
(1I) in test harness I or I2. <Ref. to AB-15, Air-
bag Control Module.>
5)Connect the battery ground cable and turn
the ignition switch to ON. (engine OFF)
6)Measure the voltage between connector (2I)
in test harness I or I2 and the chassis ground.
Connector & terminal
(2I) No. 4 (+) — Chassis ground ( − − − − ):
(2I) No. 1 (+) — Chassis ground ( − − − − ):
DIAGNOSTIC CHART WITH TROUBLE CODE
Check
Does the airbag warning light
operate properly?
Does the airbag warning light
operate properly?
Is the voltage less than 1 V?
AB-45
AIRBAG SYSTEM (DIAGNOSTICS)
Yes
Replace the Go to step 2.
driver's airbag
module. <Ref. to
AB-12, Driver's
Airbag Module.>
Replace the roll Go to step 3.
connector. <Ref.
to AB-17, Roll
Connector.>
Replace the airbag Replace the body
control module. harness with air-
<Ref. to AB-15, bag main harness.
Airbag Control
Module.>
No