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2006
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Impreza WRX STI F4-2.5L DOHC Turbo
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Repair and Diagnosis
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A L L Diagnostic Trouble Codes ( DTC )
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Testing and Inspection
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P Code Charts
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P1521
P1521
DTC P1521 BRAKE SWITCH CIRCUIT RANGE
DIAGNOSIS:
Open or short circuit in stop light switch circuit
TROUBLE SYMPTOM:
Wheels are locked while the ABS operates.
WIRING DIAGRAM:
Step 1:
Step 1 - Step 7: