Subaru 2009 IMPREZA Service Manual page 2848

Step
1 CHECK POOR CONTACT.
1) Turn the ignition switch to OFF, disconnect
the ground cable from battery, and wait for 20
seconds or more.
2) Confirm that firm contact is secured for the
connector between the airbag control module
and the clock.
2 CHECK AIRBAG MAIN HARNESS.
1) Disconnect the connectors (AB6, AB17,
AB18) from airbag control module.
2) Connect the battery ground terminal and
turn the ignition switch to ON.
NOTE:
Neither of ON/OFF illuminates when it is nor-
mal.
3 CHECK AIRBAG MAIN HARNESS.
1) Turn the ignition switch to OFF.
2) Remove the clock and disconnect the con-
nector (i59).
3) Connect the test harness AG connector
(1AG) to the connectors (AB6, AB17, AB18).
4) Measure the resistance between connector
(2AG) in the test harness AG and chassis
ground.
Connector & terminal
(2AG) No. 9 — (2AG) No. 8:
(2AG) No. 9 — Chassis ground:
(2AG) No. 8 — Chassis ground:
4 CHECK AIRBAG HARNESS.
1) Connect the connectors (7AG) and (8AG) in
the test harness AG.
2) Connect the battery ground terminal and
turn the ignition switch to ON.
5 CHECK AIRBAG HARNESS.
1) Turn the ignition switch to OFF.
2) Connect the test harness AG connector
(1AG) to the connectors (AB6, AB17, AB18).
3) Measure the resistance between connector
(2AG) in the test harness AG and connector
(i59).
Connector & terminal
(2AG) No. 9 — (i59) No. 4:
(2AG) No. 8 — (i59) No. 3:
6 CHECK BODY HARNESS.
1) Turn the ignition switch to ON.
2) Measure the voltage between connector
(i59) and chassis ground.
Connector & terminal
(i59) No. 8 (+) — Chassis ground (–):
Diagnostic Chart with Trouble Code
Is there poor contact of any
connector?
Does the passenger's airbag
indicator illuminate?
Is the resistance 1 M or
more?
Does the passenger's airbag
indicator illuminate?
Is the resistance less than 10 ? Go to step 6.
Is the voltage 10 V or more?
AB(diag)-59
AIRBAG SYSTEM (DIAGNOSTICS)
Check Yes
Replace the airbag
harness connec-
tor.
Go to step 3.
Replace the clock.
<Ref. to IDI-21,
REMOVAL,
Clock.>
Replace the airbag
control module.
<Ref. to AB-21,
Airbag Control
Module.>
Replace the clock.
<Ref. to IDI-21,
REMOVAL,
Clock.>
No
Go to step 2.
Go to step 4.
Repair the bulk-
head harness. Or
replace the airbag
main harness
along with body
harness.
Go to step 5.
Repair the bulk-
head harness. Or
replace the airbag
main harness
along with body
harness.
Repair the clock
power supply line.