Subaru Legacy 2004 Service Manual page 3035

Diagnostic Procedure with Diagnostic Trouble Code (DTC)
ABS (DIAGNOSTICS)
T: DTC C0140 CAN COMMUNICATION MALFUNCTION
DTC DETECTING CONDITION:
Defective CAN communication
TROUBLE SYMPTOM:
Possibly the vehicle speed cannot output on CAN.
Step
1 CHECK LAN SYSTEM.
Perform the diagnosis for LAN system. <Ref. to
LAN(diag)-24, OPERATION, Read Diagnostic
Trouble Code (DTC).>
Check
Is there any fault in LAN sys-
tem?
ABS(diag)-68
Yes
Repair it according Replace the
to DTC of LAN ABSCM only.
system. <Ref. to ABS-8,
REPLACEMENT,
ABS Control Mod-
ule and Hydraulic
Control Unit
(ABSCM&H/U).>
No