Subaru Legacy 2004 Service Manual page 621

Diagnostic Procedure with Diagnostic Trouble Code (DTC)
BP:DTC P1521 BRAKE SWITCH CIRCUIT RANGE/PERFORMANCE PROBLEM
(HIGH INPUT)
DTC DETECTING CONDITION:
Immediately at fault recognition
CAUTION:
After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(H4SO 2.0)(diag)-
38, OPERATION, Clear Memory Mode.> and Inspection Mode <Ref. to EN(H4SO 2.0)(diag)-32, OPER-
ATION, Inspection Mode.>.
WIRING DIAGRAM:
B65
1 2
3 4
18 19 20 21
No.4
BREKE SWITCH
B65
B137
ECM
B137
1 2 3 4 5 6 7
8 9 10 11 12 13 14 15 16 17
22 23 24 25
26 27 28 29 30 31
EN(H4SO 2.0)(diag)-189
BATTERY
SBF-9 SBF-1
ENGINE (DIAGNOSTICS)
E
EN-02545