Subaru IMPREZA GD 2007 Series Manual page 3621

asieps_tobira_IM_US.book 78 ページ ２０１２年１月１７日 火曜日 午後３時４８分
AIRBAG SYSTEM (DIAGNOSTICS)
Step
1 CHECK POOR CONTACT OF CONNECTORS.
Check for poor contact of the connectors
between the airbag control module and the
driver's airbag module.
2 CHECK SEAT BELT BUCKLE SWITCH (LH).
1) Turn the ignition switch to OFF, disconnect
the battery ground cable, and wait for 20 sec-
onds or more.
2) Disconnect connector (AB51) from the
buckle switch (LH).
3) Connect the connector (1Y) in the test har-
ness Y to connector (AB51).
4) Connect the battery ground terminal and
turn the ignition switch to ON.
3 CHECK AIRBAG REAR HARNESS (BUCKLE
SWITCH HARNESS LH).
1) Turn the ignition switch to OFF, disconnect
the battery ground cable, and wait for 20 sec-
onds or more.
2) Disconnect the connector (AB7) from airbag
control module.
3) Connect the connector (1R) in the test har-
ness R to connector (AB7).
4) Disconnect the seat belt buckle switch (LH),
and then connect the connector (1D) in the test
harness D to connector (AB51).
5) Measure the resistance between connector
(4R) in the test harness R and connector (3D) in
the test harness D.
Connector & terminal
(4R) No. 11 — (3D) No. 3:
(4R) No. 9 — (3D) No. 4:
4 CHECK AIRBAG REAR HARNESS.
Measure resistance between connector (4R) in
the test harness R and chassis ground.
Connector & terminal
(4R) No. 9 — Chassis ground:
(4R) No. 11 — Chassis ground:
5 CHECK AIRBAG CONTROL MODULE.
1) Connect all connectors.
2) Erase the memory.
3) Perform the Inspection Mode.
4) Read the DTC.
6 CHECK FOR ANY OTHER DTC ON DISPLAY. Is any other DTC displayed?
Diagnostic Chart with Trouble Code
Is there poor contact?
Does the airbag warning light
illuminate for 6 seconds and go
off?
Is the resistance less than 10
Ω?
Is the resistance less than 10
Ω?
Is the same DTC displayed?
AB(diag)-78
Check Yes
Replace the airbag
main harness.
Replace the seat
belt buckle switch
(LH). <Ref. to SB-
10, Front Seat
Belt.>
Go to step 4.
Replace the airbag
rear harness (LH)
along with body
harness.
Replace the airbag
control module.
<Ref. to AB-17,
Airbag Control
Module.>
Check DTC using
"List of Diagnostic
Trouble Code
(DTC)". <Ref. to
AB(diag)-43, List
of Diagnostic Trou-
ble Code (DTC).>
No
Go to step 2.
Go to step 3.
Replace the airbag
rear harness (LH)
along with body
harness.
Go to step 5.
Go to step 6.
Finish the diagno-
sis.