Subaru Legacy IV (2008 year). Manual — part 451
FU(H6DO)-23
Knock Sensor
FUEL INJECTION (FUEL SYSTEMS)
7. Knock Sensor
A: REMOVAL
1) Remove the collector cover.
2) Disconnect the ground cable from battery.
3) Remove the intake manifold. <Ref. to
FU(H6DO)-14, REMOVAL, Intake Manifold.>
4) Disconnect the knock sensor connector.
5) Remove the knock sensor from the cylinder
block.
B: INSTALLATION
1) Install the knock sensor to cylinder block.
Tightening torque:
25 N·m (2.5 kgf-m, 18.4 ft-lb)
NOTE:
For the knock sensor installation angle, refer to the
figure below.
2) Connect the knock sensor connector.
3) Install the intake manifold. <Ref. to FU(H6DO)-
16, INSTALLATION, Intake Manifold.>
4) Connect the ground cable to battery.
5) Install the collector cover.
IN-00203
FU-00577
(A) Front side of vehicle
45˚
30˚
10˚
(A)
FU-00578
IN-00203
FU(H6DO)-24
Throttle Position Sensor
FUEL INJECTION (FUEL SYSTEMS)
8. Throttle Position Sensor
A: SPECIFICATION
Throttle body is a non-disassembled part, so do not
remove the throttle position sensor from throttle
body.
Refer to “Throttle Body” for removal and installation
procedure. <Ref. to FU(H6DO)-13, REMOVAL,
Throttle Body.> <Ref. to FU(H6DO)-13, INSTAL-
LATION, Throttle Body.>
FU(H6DO)-25
Manifold Absolute Pressure Sensor
FUEL INJECTION (FUEL SYSTEMS)
9. Manifold Absolute Pressure
Sensor
A: REMOVAL
1) Remove the collector cover.
2) Disconnect the ground cable from the battery.
3) Disconnect the connector from the manifold ab-
solute pressure sensor (A), and remove the filter
assembly (B) from the intake manifold.
4) Remove the manifold absolute pressure sensor
from intake manifold.
B: INSTALLATION
Install in the reverse order of removal.
Tightening torque:
6.4 N·m (0.7 kgf-m, 4.7 ft-lb)
IN-00203
FU-02131
(B)
(A)
FU(H6DO)-26
Mass Air Flow and Intake Air Temperature Sensor
FUEL INJECTION (FUEL SYSTEMS)
10.Mass Air Flow and Intake Air
Temperature Sensor
A: REMOVAL
1) Disconnect the ground cable from the battery.
2) Disconnect the connectors from the mass air
flow and intake air temperature sensor.
3) Remove the mass air flow and intake air temper-
ature sensor.
B: INSTALLATION
Install in the reverse order of removal.
Tightening torque:
1 N·m (0.1 kgf-m, 0.7 ft-lb)
IN-00203
IN-02009
FU-03236
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