Subaru Impreza 2002 Service Manual page 3352

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 (AB21) from the
seat belt pretensioner (LH). <Ref. to SB-8,
Front Seat Belt.>
3)Disconnect the connector (AB20) from
(AB19).
4)Disconnect the connector (AB17) from the
airbag control module. <Ref. to AB-15, Airbag
Control Module.>
5)Connect the connector (1I) in test harness I
or I2 to connector (AB17).
6)Disconnect the connector (AB23) from the
side airbag sensor (LH), and connect the con-
nector (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. 4:
(3I) No. 14 — (3G) No. 5:
(3I) No. 15 — (3G) No. 1:
(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
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-16, 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-16, Side Airbag Sensor.>
T: DTC 55
This code is displayed when the side airbag is deployed.
When this code is displayed, the memory cannot be erased. Replace the following parts.
• Airbag control module. <Ref. to AB-15, Airbag Control Module.>
• Front seat with side airbag module. (Operating side) <Ref. to SE-6, Front Seat.>
• Side airbag sensor. (Operating side) <Ref. to AB-16, Side Airbag Sensor.>
DIAGNOSTIC CHART WITH TROUBLE CODE
Check
Is the resistance less than 10
Ω?
Is the resistance more than 1
MΩ?
AB-73
AIRBAG SYSTEM (DIAGNOSTICS)
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.
16, Side Airbag
Sensor.> When
sensor replace-
ment is not OK,
replace the airbag
control module.
<Ref. to AB-15,
Airbag Control
Module.>
No