Subaru Legacy 2005 Service Manual page 4196

Diagnostic Procedure with Diagnostic Trouble Code (DTC)
LAN SYSTEM (DIAGNOSTICS)
Step
2 CHECK HARNESS.
1) Disconnect the body integrated module
connector.
2) Measure the resistance between body inte-
grated module connector terminals.
Connector & terminal
(B280) No. 20 — No. 30:
3 CHECK HARNESS.
1) Disconnect the body integrated module
connector.
2) Measure the resistance between body inte-
grated module connector and chassis ground.
Connector & terminal
(B280) No. 20 — Chassis ground:
(B280) No. 30 — Chassis ground:
4 CHECK HARNESS.
1) Disconnect the body integrated module
connector.
2) Measure the voltage between body inte-
grated module connector and chassis ground.
(Ignition switch ON)
Connector & terminal
(B280) No. 20 (+) — Chassis ground (
(B280) No. 30 (+) — Chassis ground (
5 CHECK END RESISTANCE.
1) Disconnect the VDC/ABSCM harness con-
nector.
2) Measure the resistance between VDC/
ABSCM connector terminals.
Connector & terminal
ABS
(B301) No. 11 — No. 26:
VDC
(B310) No. 13 — No. 29:
6 CHECK HARNESS.
1) Disconnect the body integrated module
connector and VDC/ABSCM connector.
2) Measure the resistance between body inte-
grated module connector and VDC/ABSCM
connector terminals.
Connector & terminal
ABS
(B301) No. 11 — (B280) No. 30:
(B301) No. 26 — (B280) No. 20:
VDC
(B310) No. 13 — (B280) No. 20:
(B310) No. 29 — (B280) No. 30:
7 CHECK ABS/VDC CM.
1) Connect all the connectors.
2) Read the DTC of VDC/ABSCM using Sub-
aru Select Monitor.
Check
Is the resistance 115 — 125
Ω?
Is the resistance ∞ Ω?
Is the voltage more than 6 V?
−
):
−
):
Is the resistance 115 — 125
Ω?
Is the resistance less than 10
Ω?
Is DTC other than "CAN com-
munication" displayed on Sub-
aru Select Monitor?
LAN(diag)-66
Yes
Go to step 5. Go to step 3.
Open harness on Go to step 4.
related line of body
integrated mod-
ule. Repair or
replace the open
circuit of harness.
Repair or replace Go to step 5.
the short circuit of
harness.
Go to step 6. End resistance is
open. Replace the
VDC/ABSCM.
<Ref. to ABS-6,
ABS Control Mod-
ule and Hydraulic
Control Unit
(ABSCM&H/U).>
<Ref. to VDC-7,
VDC Control Mod-
ule and Hydraulic
Control Unit
(VDCCM&H/U).>
Go to step 7. Main wiring har-
ness is open.
Repair or replace
the open circuit of
harness.
Perform the diag- Temporary poor
nosis according to contact occurs.
DTC concerning Check the con-
VDC/ABSCM. necting condition
of connector and
terminals.
No