Subaru Impreza 2003 Service Manual page 2898

DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)
AIRBAG SYSTEM (DIAGNOSTICS)
Step
1 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 connector (AB19) from the
seat belt pretensioner (LH). <Ref. to SB-12,
Front Seat Belt.>
3)Disconnect the connector (AB29) from
(AB9).
4)Disconnect the connector (AB7) from the air-
bag control module. <Ref. to AB-16, Airbag
Control Module.>
5)Connect the connector (1R) in test harness
R to connector (AB7).
6)Disconnect the connector (AB10) from the
side airbag sensor (LH), and connect the con-
nector (1G) in test harness G to connector
(AB10).
7)Measure the resistance between connector
(4R) in test harness R and connector (3G) in
test harness G.
Connector & terminal
(4R) No. 3 — (3G) No. 4:
(4R) No. 1 — (3G) No. 5:
(4R) No. 2 — (3G) No. 1:
(4R) No. 4 — (3G) No. 2:
2 CHECK SIDE AIRBAG HARNESS (RH).
Measure the resistance between connector
(4R) in test harness R and the chassis ground.
Connector & terminal
(4R) No. 3 — Chassis ground:
(4R) No. 1 — Chassis ground:
(4R) No. 2 — Chassis ground:
(4R) No. 4 — Chassis ground:
R: DTC 53
DIAGNOSIS:
• Side airbag sensor (RH) is faulty.
When Code 53 is displayed, the circuit within the side airbag sensor (RH) is faulty. Replace the side airbag
sensor (RH).
<Ref. to AB-17, Side Airbag Sensor.>
S: DTC 54
DIAGNOSIS:
• Side airbag sensor (LH) is faulty.
When Code 53 is displayed, the circuit within the side airbag sensor (LH) is faulty. Replace the side airbag
sensor (LH).
<Ref. to AB-17, Side Airbag Sensor.>
Check
Is the resistance less than 10
Ω?
Is the resistance more than 1
MΩ?
AB-72
Yes
Go to step 2. Replace the body
harness with side
airbag harness.
Replace the side Replace the body
airbag sensor harness with side
(LH). <Ref. to AB- airbag harness.
17, Side Airbag
Sensor.> When
sensor replace-
ment is not OK,
replace the airbag
control module.
<Ref. to AB-16,
Airbag Control
Module.>
No