Subaru IMPREZA 2002 Service Manual page 499

DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)
ENGINE (DIAGNOSTICS)
Step
CHECKHARNESSBETWEENCRANK-
SHAFT POSITION SENSOR AND ECM CON-
NECTOR.
1)Turn the ignition switch to OFF.
2)Disconnect the connector from crankshaft
position sensor.
3)Measure the resistance of harness between
crankshaft position sensor connector and
engine ground.
Connector & terminal
(€10) No. 1
-
Engine ground:
! CHECK HARNESS BETWEEN CRANK-
SHAFT POSITION SENSOR AND ECM CON-
NECTOR.
Measure the resistance of harness between
crankshaft position sensor connector and
engine ground.
.
Connector & terminal
(€10) No. 1
-
Engine ground:
)
CHECK HARNESS BETWEEN CRANK-
SHAFT POSITION SENSOR AND ECM CON.
NECTOR.
Measure the resistance of harness between
crankshaft position sensor connector and
engine ground.
Connector & terminal
(E 10) No. 2
-
Engine ground:
I
CHECK CONDITION OF CRANKSHAFT
PO-
SlTlON SENSOR.
> CHECK CRANKSHAFT POSITION SENSOR
1)Remove the crankshaft position sensor.
2)Measure the resistance between connector
terminals of crankshaft position sensor.
Terminals
NO. 1
-
NO. 2:
Check
3
the resistance more than
00 kR?
3
the resistance less than 10
I?
s the resistance less than 5
2?
s the crankshaft position sen-
ior installation bolt tightened
iecurely?
s the resistance between 1
rnd 4 kQ?
Yes
3epair harness
ind connector.
JOTE:
n this case, repair
he following:
Open circuit in
iarness between
:rankshaft posi-
ion sensor and
ICM connector
Poor contact in
ICM connector
Poor contact in
:oupling connector
821)
3epair ground
;hort circuit in har-
less between
rankshaft posi-
ion sensor and
ICM connector.
IOTE:
-he harness b e
ween both con-
lectors are
ihielded. Repaii
jround short circuii
n harness togeth.
?r with shield.
30 to step 4.
30 to step 5.
3epair poor con-
act in crankshaft
losition sensor
:onnecto r.
No
30 to step 2.
30
to step
3 .
3epair harness
and connector.
\IOTE:
n this case, repai
he following:
1
Open circuit in
iarness between
:rankshaft posi-
ion sensor and
I C M connector
1
Poor contact in
I C M connector
1
Poor contact in
:oupling connect0
:B2 1 )
righten crank-
shaft position sen,
;or installation bo1
securely.
3eplace the crank
shaft position sen
;or. <Ref. to
Srankshaft Posi-
:ion Sensor.>
FU( S0HC)-28,
EN(S0HC)-175