Subaru Legacy 2004 Service Manual page 3567

1. MODEL WITH CURTAIN AIRBAG
Step
1 CHECK AIRBAG REAR HARNESS (SIDE
AIRBAG SENSOR HARNESS RH).
1) Turn the ignition switch OFF, disconnect the
battery ground terminal, and wait more than 20
seconds.
2) Disconnect the connector (AB26) from seat
belt pretensioner (RH). <Ref. to SB-12, Front
Seat Belt.>
3) Disconnect the connector (AB33) from cur-
tain airbag module (RH).
4) Disconnect the connector (AB25) from
(AB24).
5) Disconnect the connector (AB18) from air-
bag control module. <Ref. to AB-20, Airbag
Control Module.>
6) Connect the connector (1U) in the test har-
ness U to connector (AB18).
7) Disconnect the connector (AB28) from side
airbag sensor (RH), and connect the connector
(2V) in the test harness V to connector (AB28).
8) Measure the resistance between connector
(4U) in the test harness U and connector (3V)
in the test harness V.
Connector & terminal
(4U) No. 5 — (3V) No. 2:
(4U) No. 7 — (3V) No. 1:
(4U) No. 8 — (3V) No. 5:
(4U) No. 6 — (3V) No. 4:
2 CHECK AIRBAG REAR HARNESS (SIDE
AIRBAG SENSOR HARNESS RH).
Measure the resistance between connector
(4U) in the test harness U and chassis ground.
Connector & terminal
(4U) No. 5 — Chassis ground:
(4U) No. 7 — Chassis ground:
(4U) No. 8 — Chassis ground:
(4U) No. 6 — Chassis ground:
Diagnostic Chart with Trouble Code
Is the resistance less than 10
"?
Is the resistance more than 1
M"?
AB(diag)-77
AIRBAG SYSTEM (DIAGNOSTICS)
Check Yes
Go to step 2.
Replace the side
airbag sensor
(RH). <Ref. to AB-
21, Side Airbag
Sensor.> When
the sensor is not
OK, though the
sensor is replaced,
replace the airbag
control module.
<Ref. to AB-20,
Airbag Control
Module.>
No
Replace the airbag
rear harness with
body harness.
Replace the airbag
rear harness with
body harness.