Subaru LEGACY 2004 Service Manual page 272

Diagnostic Procedure with Diagnostic Trouble Code (DTC)
ABS (DIAGNOSTICS)
M: DTC C0126 REAR INLET SOLENOID VALVE RH MALFUNCTION IN ABS
CONTROL MODULE AND HYDRAULIC CONTROL UNIT (ABSCM&H/U)
DTC DETECTING CONDITION:
• Defective harness connector
• Defective inlet solenoid valve in ABSCM&H/U
TROUBLE SYMPTOM:
• ABS does not operate.
• EBD does not operate.
NOTE:
Brake warning light comes on as well as ABS warning light.
ABS(diag)-56