Subaru Legacy 2002 Service Manual page 2629

DIAGNOSTICS CHART WITH SELECT MONITOR
VDC (Diagnostics)
Y: DTC 43 AET COMMUNICATION LINE MALFUNCTION
S005504J60
DIAGNOSIS:
¼ AET communication line is broken or short circuited.
TROUBLE SYMPTOM:
¼ VDC does not operate.
WIRING DIAGRAM:
B4M2522
VDC-170