Subaru Legacy 2002 Service Manual page 3280

DIAGNOSTIC CHART WITH DIAGNOSTIC TROUBLE CODE (DTC)
No.
1 CHECK FRONT SUB-SENSOR (RH) 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 the connector (AB6) from the
airbag control module , and connect the con-
nector (1I) in test harness I or I2. <Ref. to
AB-17, Airbag Control Module.>
3) Measure the resistance of the connector
(3I) in test harness I or I2.
Connector & terminal
(3I) No. 2 — No. 4:
2 CHECK FRONT SUB-SENSOR (RH) 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. 2 — Chassis ground:
(3I) No. 4 — Chassis ground:
3 CHECK AIRBAG MAIN HARNESS AND
FRONT SUB-SENSOR HARNESS (RH).
1) Disconnect connector (AB16) from the front
sub-sensor. <Ref. to AB-20, Front Sub Sen-
sor.>
2) Connect connector (IH) in test harness H
to connector (AB16).
3) Measure the resistance between connector
(3I) in test harness I or I2 and connector (3H)
in test harness H.
Connector & terminal
(3I) No. 2 — (3H) No. 5:
(3I) No. 4 — (3H) No. 6:
4 CHECK AIRBAG MAIN HARNESS 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. 2 — Chassis ground:
(3I) No. 4 — Chassis ground:
5 CHECK AIRBAG MAIN HARNESS
1) Remove the instrument panel. <Ref. to
EI-35, Instrument Panel Assembly.>
2) Disconnect connector (AB15) from (AB14),
and connect connector (2F) in test harness F
to connector (AB14).
3) Measure the resistance between connector
(3I) in test harness I or I2 and connector (3F)
in test harness F.
Connector & terminal
(3I) No. 2 — (3F) No. 6:
(3I) No. 4 — (3F) No. 5:
Step
Is the resistance between
750Ω and 1 KΩ?
Is the resistance more than
1 MΩ?
Is the resistance less than
10Ω?
Is the resistance more than
1 MΩ?
Is the resistance less than
10 Ω?
AB-51
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 airbag
main harness.
<Ref. to AB-15,
Main Harness.>