Subaru 2009 IMPREZA Service Manual page 943

FUEL INJECTION (FUEL SYSTEMS)
26) Disconnect the connectors from the engine
coolant temperature sensor (A), oil pressure switch
(B) and crankshaft position sensor (C).
(B)
27) Disconnect the connector from power steering
pump switch.
28) Disconnect the knock sensor connector.
Intake Manifold
29) Disconnect the connector from the secondary
air combination valve.
(A)
(C)
FU-00027
30) Disconnect the connector from camshaft posi-
tion sensor.
FU-03022
FU-03900
FU(H4DOTC)-18
FU-03901
FU-03902