Subaru IMPREZA 2004 Service Manual page 87

Diagnostic Procedure with Diagnostic Trouble Code (DTC)
ENGINE (DIAGNOSTICS)
Step
7 CHECK CONDITION OF CAMSHAFT POSI-
TION SENSOR.
Turn the ignition switch to OFF.
8 CHECK CAMSHAFT SPROCKET.
Remove the front belt cover. <Ref. to
ME(H4SO)-47, Timing Belt Cover.>
9 CHECK INSTALLATION CONDITION OF
TIMING BELT.
Turn the camshaft using ST, and align align-
ment mark on camshaft sprocket with align-
ment mark on timing belt cover LH.
ST 499987500 CRANKSHAFT SOCKET
Check
Is the camshaft position sensor
installation bolt tightened
securely?
Are camshaft sprocket teeth
cracked or damaged?
Is the timing belt dislocated
from its proper position?
EN(H4SO)(diag)-164
Yes
Go to step 8. Tighten camshaft
position sensor
installation bolt
securely.
Replace the cam- Go to step 9.
shaft sprocket.
<Ref. to
ME(H4SO)-53,
Camshaft
Sprocket.>
Repair installation Replace the cam-
condition of timing shaft position sen-
belt. <Ref. to sor. <Ref. to
ME(H4SO)-48, FU(H4SO)-29,
Timing Belt Camshaft Position
Assembly.> Sensor.>
No