Subaru Impreza 2003 Service Manual page 2870

DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)
AIRBAG SYSTEM (DIAGNOSTICS)
Step
1 CHECK PASSENGER'S AIRBAG MODULE.
1)Turn the ignition switch to OFF, disconnect
the battery ground cable, and wait more than
20 seconds.
2)Remove the glove box.
3)Disconnect the connector (AB27) from
(AB4).
4)Connect the connector (1F) in test harness F
to connector (AB4).
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.
2 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 instrument panel lower cover
and disconnect the connector (AB26) from
(AB21).
4)Disconnect the connector (AB3) from the air-
bag control module, and connect the connector
(1R) in test harness R. <Ref. to AB-16, Airbag
Control Module.>
5)Measure the resistance between connector
(2R) in test harness R and the connector (3F)
in test harness F.
Connector & terminal
(2R) No. 3 — (3F) No. 3:
(2R) No. 5 — (3F) No. 4:
3 CHECK AIRBAG MAIN HARNESS.
Measure the resistance of the connector (2R)
in test harness R.
Connector & terminal
(2R) No. 3 — (2R) No. 5:
(2R) No. 3 — Chassis ground:
(2R) No. 5 — Chassis ground:
Check
Does the airbag warning light
operate properly?
Is the resistance less than 10
Ω?
Is the resistance more than 1
MΩ?
AB-44
Yes
Replace the pas- Go to step 2.
senger airbag
module. <Ref. to
AB-13, Passen-
ger's Airbag Mod-
ule.>
Go to step 3. Replace the body
harness with air-
bag main harness.
Replace the airbag Replace the body
control module. harness with air-
<Ref. to AB-16, bag main harness.
Airbag Control
Module.>
No