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Subaru Legacy IV (2008 year). Manual - part 1177
LAN(diag)-42
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
LAN SYSTEM (DIAGNOSTICS)
Step
Check
Yes
No
1
CHECK FUSE.
1) Turn the ignition switch to OFF.
2) Remove the fuse (No. 31).
Is the fuse blown out?
Replace the fuse
(No. 31). If the
replaced fuse has
blown out easily,
repair the short cir-
cuit of harness
between fuse (No.
31) and body inte-
grated unit.
Go to step 2.
2
CONTINUITY CHECK OF WIRING HAR-
NESS.
1) Disconnect the connector (i84) from body
integrated unit.
2) Turn the ignition switch to ON.
3) Measure the voltage between body inte-
grated unit connector and chassis ground.
Connector & terminal
(i84) No. 24 (+) — Chassis ground (–):
Is the voltage 9 — 15 V?
Go to step 3.
Repair the harness
for open or shorted
circuit between
body integrated
unit and fuse.
3
CHECK POOR CONTACT IN CONNECTOR.
Is there poor contact in body
integrated unit connector?
Repair the poor
contact of connec-
tor.
Go to step 4.
4
CHECK BODY INTEGRATED UNIT HAR-
NESS.
1) Connect all connectors.
2) Perform the Clear Memory Mode.
3) Read DTC.
Is DTC displayed?
Replace the body
integrated unit.
<Ref. to SL-56,
Body Integrated
Unit.>
Temporary poor
contact occurs.