Subaru Legacy 2005 Service Manual page 4178

Diagnostic Procedure with Diagnostic Trouble Code (DTC)
LAN SYSTEM (DIAGNOSTICS)
Step
10 CHECK CONTROL MODULE (EXCEPT FOR
AT MODEL, GO TO NEXT).
1) Connect the steering angle sensor connec-
tor.
2) Perform the clear memory mode.
3) Disconnect the TCM connector (B54), and
read the DTC.
11 CHECK CONTROL MODULE.
1) Connect the TCM connector.
2) Perform the clear memory mode.
3) Disconnect the VDC/ABS connector (B310
or B301), and read the DTC.
12 CHECK ECM.
1) Connect all the control module connectors.
2) Check the data of "Integ. unit data
received" on the current data display of ECM.
13 CHECK BODY INTEGRATED MODULE.
Check the data of "body integrated module
counter update" on ECM data display using
Subaru Select Monitor.
14 CHECK HARNESS.
1) Disconnect the body integrated module
connector.
2) Measure the resistance between body inte-
grated module connector terminals.
3) Disconnect the connectors of each control
unit.
Connector & terminal
(B280) No. 20 — No. 30:
Check
Is DTC B0201 displayed on
Subaru Select Monitor?
Is DTC B0201 displayed on
Subaru Select Monitor?
Is the "Yes" displayed?
Is the "Yes" displayed?
Is there any control module
which its resistance changes
from less than 10 Ω?
LAN(diag)-48
Yes
Go to step 11. Replace the TCM.
<Ref. to 5AT-61,
REMOVAL, Trans-
mission Control
Module (TCM).>
Go to step 12. Replace the VDC/
ABSCM. <Ref. to
VDC-7,
REMOVAL, VDC
Control Module
and Hydraulic
Control Unit
(VDCCM&H/U).>
<Ref. to ABS-6,
REMOVAL, ABS
Control Module
and Hydraulic
Control Unit
(ABSCM&H/U).>
Go to step 13. Replace the body
integrated mod-
ule. <Ref. to SL-
44, REMOVAL,
Body Integrated
Module.>
Replace the ECM. Replace the body
<Ref. to FU(H4SO integrated mod-
2.0)-34, ule. <Ref. to SL-
REMOVAL, 44, REMOVAL,
Engine Control Body Integrated
Module (ECM).> Module.>
<Ref. to FU(H4SO
2.5)-37,
REMOVAL,
Engine Control
Module (ECM).>
<Ref. to
FU(H4DOTC)-34,
REMOVAL,
Engine Control
Module (ECM).>
<Ref. to
FU(H6DO)-34,
REMOVAL,
Engine Control
Module (ECM).>
Replace the con- Repair or replace
trol module which the short circuit of
its resistance the harness.
changes.
No