Subaru 2009 IMPREZA Service Manual page 1830

Step
1 CHECK DTC OF BODY INTEGRATED UNIT.
Check DTC of body integrated unit.
<Ref. to LAN(diag)-15, OPERATION, Subaru
Select Monitor.>
2 CHECK HARNESS CONNECTOR BETWEEN
BODY INTEGRATED UNIT AND CHASSIS
GROUND.
1) Turn the ignition switch to ON.
2) Measure the voltage between body inte-
grated unit and chassis ground.
Connector & terminal
(B280) No. 1 (+) — Chassis ground (–):
(B280) No. 6 (+) — Chassis ground (–):
(B280) No. 7 (+) — Chassis ground (–):
(B279) No. 22 (+) — Chassis ground (–):
3 CHECK HARNESS CONNECTOR BETWEEN
BODY INTEGRATED UNIT AND CHASSIS
GROUND.
1) Turn the ignition switch to OFF.
2) Measure the harness resistance between
the body integrated unit and chassis ground.
Connector & terminal
(i84) No. 28 — Chassis ground:
(B279) No. 27 — Chassis ground:
(B280) No. 17 — Chassis ground:
(B281) No. 20 — Chassis ground:
4 CHECK POOR CONTACT.
AT Shift Lock Control System
Is the DTC of power line dis-
played on body integrated unit?
Is the voltage 9 — 16 V?
Is the resistance less than 1 ? Go to step 4.
Is there poor contact of connec-
tor?
CS-13
Check Yes
Repair or replace it
according to the
DTC.
Go to step 3.
Repair the poor
contact.
CONTROL SYSTEMS
No
Go to step 2.
Check harness for
open circuit
between the body
integrated unit and
the battery or a
blown fuse.
Repair the open
circuit of harness
between the body
integrated unit and
chassis ground.
Check body inte-
grated unit.