Subaru Legacy 2002 Service Manual page 2441

DIAGNOSTICS CHART WITH SUBARU SELECT MONITOR
ABS (Diagnostics)
AD: DTC 54 STOP LIGHT SWITCH SIGNAL CIRCUIT MALFUNCTION
S006583I81
DIAGNOSIS:
¼ Faulty stop light switch
TROUBLE SYMPTOM:
¼ ABS does not operate.
WIRING DIAGRAM:
B4M2518
ABS-140