Subaru Impreza 2002 Service Manual page 3360

Step
1 CHECK SEAT BELT PRETENSIONER.
1)Turn the ignition switch to OFF, disconnect
the battery ground cable, and wait more than
20 seconds.
2)Disconnect the connector (AB21) from the
seat belt pretensioner (LH). <Ref. to SB-8,
Front Seat Belt.>
3)Connect the connector (1L) in test harness L
to (AB21).
4)Connect the airbag resistor to the connector
(3L) in test harness L.
5)Connect the battery ground cable and turn
the ignition switch to ON.
2 CHECK SIDE AIRBAG HARNESS (LH).
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 test
harness.
3)Disconnect the connector (AB20) from
(AB19).
4)Disconnect the connectors (AB17) and
(AB18) from the airbag control module. <Ref.
to AB-15, Airbag Control Module.>
5)Connect the connector (1I) in test harness I
or I2 to the connector (AB17).
6)Connect the battery ground cable and turn
the ignition switch to ON.
7)Measure the voltage between connector (3I)
in test harness I or I2 and the chassis ground.
Connector & terminal
(3I) No. 11 (+) — Chassis ground ( − − − − ):
(3I) No. 13 (+) — Chassis ground ( − − − − ):
DIAGNOSTIC CHART WITH TROUBLE CODE
Check
Does the airbag warning light
operate properly?
Is the voltage less than 1 V?
AB-81
AIRBAG SYSTEM (DIAGNOSTICS)
Yes
Replace the seat Go to step 2.
belt pretensioner
(LH). <Ref. to SB-
8, Front Seat
Belt.>
Replace the airbag Replace the body
control module. harness with side
<Ref. to AB-15, airbag harness.
Airbag Control
Module.>
No