Subaru Legacy 2004 Service Manual page 4128

Diagnostic Procedure with Diagnostic Trouble Code (DTC)
LAN SYSTEM (DIAGNOSTICS)
Step
1 CHECK ECM.
Read the DTC of ECM using Subaru Select
Monitor.
Check
Is DTC other than "CAN com-
munication" displayed?
LAN(diag)-52
Yes
Perform the diag- Replace the ECM.
nosis according to <Ref. to FU(H4SO
DTC. 2.0)-34, Engine
Control Module
(ECM).> <Ref. to
FU(H4SO 2.5)-36,
Engine Control
Module (ECM).>
<Ref. to
FU(H4DOTC)-35,
Engine Control
Module (ECM).>
<Ref. to
FU(H6DO)-34,
Engine Control
Module (ECM).>
No