Subaru Legacy 2002 Service Manual page 2637

DIAGNOSTICS CHART WITH SELECT MONITOR
VDC (Diagnostics)
AA: DTC 43 AEC COMMUNICATION LINE MALFUNCTION
S005504J62
DIAGNOSIS:
¼ AEC communication line is broken or short circuited.
TROUBLE SYMPTOM:
¼ VDC does not operate.
WIRING DIAGRAM:
B4M2522
VDC-178