Subaru Legacy 2002 Service Manual page 3298

DIAGNOSTIC CHART WITH DIAGNOSTIC TROUBLE CODE (DTC)
No.
1 CHECK SIDE AIRBAG HARNESS (LH).
1) Turn the ignition switch OFF, disconnect
the battery ground cable, and wait more than
20 seconds.
2) Disconnect the connector (AB21) from the
seat belt pretensioner (LH). <Ref. to SB-8,
Front Seat Belt.>
3) Disconnect connector (AB20) from (AB19).
4) Disconnect connector (AB17) from the air-
bag control module. <Ref. to AB-17, Airbag
Control Module.>
5) Connect connector (1I) in test harness I or
I2 to connector (AB17).
6) Disconnect connector (AB23) from the side
airbag sensor (LH), and connect connector
(1G) in test harness G to connector (AB23).
7) Measure the resistance between connector
(3I) in test harness I or I2 and connector (3G)
in test harness G.
Connector & terminal
(3I) No. 5 — (3G) No. 5:
(3I) No. 14 — (3G) No. 1:
(3I) No. 15 — (3G) No. 4:
(3I) No. 16 — (3G) No. 2:
2 CHECK SIDE AIRBAG HARNESS (RH).
Measure the resistance between connector
(3I) in test harness I or I2 and the chassis
ground.
Connector & terminal
(3I) No. 5 — Chassis ground:
(3I) No. 14 — Chassis ground:
(3I) No. 15 — Chassis ground:
(3I) No. 16 — Chassis ground:
R: DTC 53
S002811J04
DIAGNOSIS:
¼ 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-18, Side Airbag Sensor.>
S: DTC 54
S002811J05
DIAGNOSIS:
¼ 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-18, Side Airbag Sensor.>
T: DTC 55
S002811J06
This code is displayed when the side airbag is deployed.
When this code is displayed, the memory cannot be erased. Replace the following parts.
¼ Airbag control module. <Ref. to AB-17, Airbag Control Module.>
¼ Front seat with side airbag module. (Operating side) <Ref. to SE-7, Front Seat.>
¼ Side airbag sensor. (Operating side) <Ref. to AB-18, Side Airbag Sensor.>
Step
Is the resistance less than
10 Ω?
Is the resistance more than
1 MΩ?
AB-69
Airbag System (Diagnostics)
Check Yes
Go to step 2.
Replace side air-
bag sensor (LH).
<Ref. to AB-18,
Side Airbag Sen-
sor.> When sen-
sor replacement is
not OK, replace
the airbag control
module. <Ref. to
AB-17, Airbag
Control Module.>
No
Replace side air-
bag harness.
<Ref. to AB-16,
Side Airbag Har-
ness.>
Replace side air-
bag harness.
<Ref. to AB-16,
Side Airbag Har-
ness.>