Subaru Impreza 2003 Service Manual page 1349

DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)
Step
1 CHECK ANY OTHER DTC ON DISPLAY.
2 CHECK CONDITION OF CRANKSHAFT PO-
SITION SENSOR.
Turn the ignition switch to OFF.
3 CHECK CRANKSHAFT SPROCKET.
Remove the front belt cover.
4 CHECK INSTALLATION CONDITION OF
TIMING BELT.
Turn the crankshaft, and align alignment mark
on crankshaft sprocket with alignment mark on
cylinder block.
Check
Is any other DTC displayed?
Is the crankshaft position sen-
sor installation bolt tightened
securely?
Are the crankshaft sprocket
teeth cracked or damaged?
Is the timing belt dislocated
from its proper position?
EN(H4DOTC)-173
ENGINE (DIAGNOSTICS)
Yes
Inspect the rele- Go to step 2.
vant DTC using
"List of Diagnostic
Trouble Code
(DTC)". <Ref. to
EN(H4DOTC)-75,
List of Diagnostic
Trouble Code
(DTC).>
Go to step 3. Tighten the crank-
shaft position sen-
sor installation bolt
securely.
Replace the crank- Go to step 4.
shaft sprocket.
<Ref. to
FU(H4DOTC)-29,
Crankshaft Posi-
tion Sensor.>
Repair the installa- Replace the crank-
tion condition of shaft position sen-
timing belt. <Ref. sor. <Ref. to
to ME(H4DOTC)- FU(H4DOTC)-29,
60, Timing Belt Crankshaft Posi-
Assembly.> tion Sensor.>
No