Subaru Legacy 2004 Service Manual page 3549

Step
1 CHECK AIRBAG MAIN HARNESS (FRONT
SUB-SENSOR HARNESS LH).
1) Turn the ignition switch OFF, disconnect the
battery ground terminal, and wait more than 20
seconds.
2) Remove the instrument panel lower cover
and disconnect the connector (AB7) and
(AB2).
3) Remove the instrument panel side cover on
passenger's side and disconnect the connector
(AB10) and (AB9).
4) Disconnect the connector (AB6) from air-
bag control module. <Ref. to AB-20, Airbag
Control Module.>
5) Connect the connector (1U) in the test har-
ness U to connector (AB6).
6) Disconnect the front sub-sensor (LH), and
then connect the connector (1H) in the test
harness H to connector (AB13).
7) Measure the resistance between connector
(3U) in the test harness U and connector (3H)
in the test harness H.
Connector & terminal
(3U) No. 6 — (3H) No. 5:
(3U) No. 8 — (3H) No. 6:
2 CHECK AIRBAG MAIN HARNESS (FRONT
SUB-SENSOR HARNESS LH).
Measure the resistance between connector
(3U) in the test harness U and chassis ground.
Connector & terminal
(3U) No. 6 — Chassis ground:
(3U) No. 8 — Chassis ground:
L: DTC 33
DTC DETECTING CONDITION:
Front sub-sensor (RH) is faulty.
When DTC 33 is displayed, the circuit within the front sub-sensor (RH) is faulty. Replace the front sub-sensor
(RH). <Ref. to AB-24, Front Sub Sensor.>
M: DTC 34
DTC DETECTING CONDITION:
Front sub-sensor (LH) is faulty.
When DTC 34 is displayed, the circuit within the front sub-sensor (LH) is faulty. Replace the front sub-sensor
(LH). <Ref. to AB-24, Front Sub Sensor.>
Diagnostic Chart with Trouble Code
Is the resistance less than 10
"?
Is the resistance more than 1
M"?
AB(diag)-59
AIRBAG SYSTEM (DIAGNOSTICS)
Check Yes
Go to step 2.
Replace the front
sub-sensor (LH).
<Ref. to AB-24,
Front Sub Sen-
sor.> 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
main harness with
body harness.
Replace the airbag
main harness with
body harness.