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Subaru
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2009
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Impreza WRX, 4D Sedan
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Repair and Diagnosis
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Engine Performance
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Engine Control Systems
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Fuel Injection System (H4DOTC)
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Knock Sensor
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Removal
Knock Sensor: Removal
Disconnect the ground cable from battery.
Fig 1: Identifying Battery Ground Cable
Courtesy of SUBARU OF AMERICA, INC.
Remove the intercooler. Refer to
REMOVAL
, Intercooler.
Disconnect the knock sensor connector.
Fig 2: Identifying Knock Sensor Connector
Courtesy of SUBARU OF AMERICA, INC.
Remove the knock sensor from cylinder block.
Fig 3: Locating Knock Sensor From Cylinder Block And Bolt
Courtesy of SUBARU OF AMERICA, INC.