Subaru LEGACY 2004 Service Manual page 216

AIRBAG SYSTEM (DIAGNOSTICS)
Step
1 CHECK AIRBAG REAR HARNESS (CUR-
TAIN AIRBAG SENSOR HARNESS LH).
1) Turn the ignition switch OFF, disconnect the
battery ground terminal, and wait more than 20
seconds.
2) Disconnect the connector (AB21) from seat
belt pretensioner (LH). <Ref. to SB-12, Front
Seat Belt.>
3) Disconnect the connector (AB19) from side
airbag module (LH).
4) Disconnect the connector (AB31) from
(AB39).
5) Disconnect the connector (AB17) 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 (AB17).
7) Disconnect the connector (AB32) from cur-
tain airbag sensor (LH), and connect the con-
nector (2V) in the test harness V to connector
(AB32).
8) Measure the resistance between connector
(5U) in the test harness U and connector (3V)
in the test harness V.
Connector & terminal
(5U) No. 11 — (3V) No. 4:
(5U) No. 9 — (3V) No. 5:
(5U) No. 10 — (3V) No. 1:
(5U) No. 12 — (3V) No. 2:
2 CHECK AIRBAG REAR HARNESS (CUR-
TAIN AIRBAG SENSOR HARNESS LH).
Measure the resistance between connector
(5U) in the test harness U and chassis ground.
Connector & terminal
(5U) No. 11 — Chassis ground:
(5U) No. 9 — Chassis ground:
(5U) No. 10 — Chassis ground:
(5U) No. 12 — Chassis ground:
Y: DTC 58
DTC DETECTING CONDITION:
Curtain airbag sensor (RH) is faulty.
When DTC 58 is displayed, the circuit within the curtain airbag sensor (RH) is faulty. Replace the curtain air-
bag sensor (RH). <Ref. to AB-22, Curtain Airbag Sensor.>
Z: DTC 59
DTC DETECTING CONDITION:
Curtain airbag sensor (LH) is faulty.
When DTC 59 is displayed, the circuit within the curtain airbag sensor (LH) is faulty. Replace the curtain air-
bag sensor (LH). <Ref. to AB-22, Curtain Airbag Sensor.>
Diagnostic Chart with Trouble Code
Is the resistance less than 10
"?
Is the resistance more than 1
M"?
AB(diag)-86
Check Yes
Go to step 2.
Replace the cur-
tain airbag sensor
(LH). <Ref. to AB-
22, Curtain 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.