Subaru 2009 IMPREZA Service Manual page 2911

AIRBAG SYSTEM (DIAGNOSTICS)
Step
2 CHECK AIRBAG REAR HARNESS (BE-
TWEEN AIRBAG CONTROL MODULE AND
SATELLITE SAFING SENSOR).
1) Turn the ignition switch to OFF, disconnect
the ground cable from battery, and wait for 20
seconds or more.
2) Disconnect the connectors (AB21, AB26)
from seat belt pretensioner.
3) Disconnect the connectors (AB31, AB33)
from curtain airbag module.
4) Disconnect the connectors (AB19), (AB20),
(AB24) and (AB25) from the side airbag mod-
ule.
5) Disconnect the connectors (AB17, AB6,
AB18) from airbag control module.
6) Connect the connector (1AG) in the test har-
ness AG to the connectors (AB17, AB6, AB18).
7) Disconnect the connector (AB41) from sat-
ellite safing sensor, and then connect the con-
nector (1H) in the test harness H to connector
(AB41).
8) Measure the resistance between connector
(5AG) in the test harness AG and connector
(3H) in the test harness H.
Connector & terminal
(5AG) No. 9 — (3H) No. 5:
(5AG) No. 11 — (3H) No. 6:
3 CHECK AIRBAG REAR HARNESS (BE-
TWEEN AIRBAG CONTROL MODULE AND
SATELLITE SAFING SENSOR).
Measure the resistance between connector
(5AG) in the test harness AG and chassis
ground, and the resistance between connector
(5AG) terminals in the test harness AG.
Connector & terminal
(5AG) No. 9 — Chassis ground:
(5AG) No. 11 — Chassis ground:
(5AG) No. 9 — (5AG) No. 11:
4 CHECK AIRBAG CONTROL MODULE.
1) Connect all connectors.
2) Clear the memory.
3) Perform the Inspection Mode.
4) Read the DTC.
5 CHECK FOR ANY OTHER DTC ON DISPLAY. Is any other DTC displayed?
Diagnostic Chart with Trouble Code
Is the resistance less than 10 ? Go to step 3.
Is the resistance 1 M or
more?
Is the same DTC displayed?
AB(diag)-122
Check Yes
Go to step 4.
Replace the satel-
lite safing sensor.
<Ref. to AB-25,
REMOVAL, Satel-
lite Safing Sen-
sor.> Replace the
airbag control
module if not oper-
ating normally
even after replac-
ing the sensor.
<Ref. to AB-21,
REMOVAL, Airbag
Control Module.>
Check DTC using
"List of Diagnostic
Trouble Code
(DTC)". <Ref. to
AB(diag)-38, List
of Diagnostic Trou-
ble Code (DTC).>
No
Replace the airbag
rear harness along
with body harness.
Replace the airbag
rear harness along
with body harness.
Go to step 5.
Finish the diagno-
sis.