Subaru Legacy 2002 Service Manual page 3284

DIAGNOSTIC CHART WITH DIAGNOSTIC TROUBLE CODE (DTC)
No.
1 CHECK FRONT SUB-SENSOR (LH) AND
FRONT SUB-SENSOR HARNESS (RH).
1) Turn the ignition switch OFF, disconnect
the battery ground cable, and wait more than
20 seconds.
2) Disconnect connector (AB6) from the air-
bag control module, and connect connector
(1I) in the test harness I or I2 to connector
(AB6). <Ref. to AB-17, Airbag Control Mod-
ule.>
3) Measure the resistance of the connector
(3I) in the test harness I or I2.
Connector & terminal
(3I) No. 1 — No. 3:
2 CHECK FRONT SUB-SENSOR (LH) AND
FRONT SUB-SENSOR HARNESS (RH).
Measure the resistance between connector
(3I) in test harness I or I2 and the chassis
ground.
Connector & terminal
(3I) No. 1 — Chassis ground:
(3I) No. 3 — Chassis ground:
3 CHECK AIRBAG MAIN HARNESS AND
FRONT SUB-SENSOR HARNESS (LH).
1) Disconnect the connector (AB13) from the
front sub-sensor. <Ref. to AB-20, Front Sub
Sensor.>
2) Connect connector (1H) in test harness H
to connector (AB13).
3) Measure the resistance between connector
(3I) in test harness I or I2 and connector (3H)
in test harness H.
Connector & terminal
(3I) No. 3 — (3H) No. 5:
(3I) No. 1 — (3H) No. 6:
4 CHECK AIRBAG MAIN HARNESS AND
FRONT SUB-SENSOR HARNESS (LH).
Measure the resistance between connector
(3I) in test harness I or I2 and the chassis
ground.
Connector & terminal
(3I) No. 3 — Chassis ground:
(3I) No. 1 — Chassis ground:
5 CHECK AIRBAG MAIN HARNESS.
1) Remove the instrument panel. <Ref. to
EI-35, REMOVAL, Instrument Panel Assem-
bly.>
2) Disconnect connector (AB11) from (AB12),
and connect connector (2F) in test harness F
to (AB11).
3) Measure the resistance between connector
(3I) in test harness I or I2 and connector (3F)
in test harness F.
Connector & terminal
(3I) No. 3 — (3F) No. 6:
(3I) No. 1 — (3F) No. 5:
Step
Is the resistance between
750Ω and 1 KΩ?
Is the resistance more than
1 MΩ?
Is the resistance less than
10 Ω?
Is the resistance more than
1 MΩ?
Is the resistance less than
10 Ω?
AB-55
Airbag System (Diagnostics)
Check Yes
Replace the air-
bag control mod-
ule. <Ref. to
AB-17, Airbag
Control Module.>
Replace the air-
bag control mod-
ule. <Ref. to
AB-17, Airbag
Control Module.>
Go to step 4.
Go to step 9.
Go to step 6.
No
Go to step 2.
Go to step 3.
Go to step 5.
Go to step 5.
Replace the air-
bag main har-
ness. <Ref. to
AB-15, Main Har-
ness.>