Subaru Impreza 2002 Service Manual page 3334

Step
1 CHECK FRONT SUB-SENSOR (RH) AND
FRONT SUB-SENSOR HARNESS (RH).
1)Turn the ignition switch to OFF, disconnect
the battery ground cable, and wait more than
20 seconds.
2)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.>
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 the connector (AB16) from the
front sub-sensor. <Ref. to AB-18, Front Sub
Sensor.>
2)Connect the 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)Disconnect the connector (AB15) from
(AB14), and connect the connector (1F) in test
harness F to connector (AB14).
2)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. 4:
(3I) No. 4 — (3F) No. 3:
6 CHECK AIRBAG MAIN HARNESS
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:
DIAGNOSTIC CHART WITH TROUBLE CODE
Check
Is the resistance between 750
Ω 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?
Is the resistance more than 1
MΩ?
AB-55
AIRBAG SYSTEM (DIAGNOSTICS)
Yes
Replace the airbag Go to step 2.
control module.
<Ref. to AB-15,
Airbag Control
Module.>
Replace the airbag Go to step 3.
control module.
<Ref. to AB-15,
Airbag Control
Module.>
Go to step 4. Go to step 5.
Go to step 9. Go to step 5.
Go to step 6. Replace the body
harness with air-
bag main harness.
Go to step 7. Replace the body
harness with air-
bag main harness.
No