Subaru IMPREZA 2002 Service Manual page 503

DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)
ENGINE (DIAGNOSTICS)
!
Step
CHECK HARNESS BETWEEN CAMSHAFT
TOR.
1)Turn the ignition switch to OFF.
2)Disconnect the connector from camshaft
position sensor.
3)Measure the resistance of harness between
camshaft position sensor connector and
engine ground.
POSITION SENSOR AND ECM CONNEC-
Connector & terminal
(€15) No. 1
-
Engine ground:
CHECK HARNESS BETWEEN CAMSHAFT
TOR.
Measure the resistance of harness between
camshaft position sensor connector and
engine ground.
.
Connector & terminal
POSITION SENSOR AND ECM CONNEC-
(€15)
No.
1
-
Engine ground:
1 CHECK HARNESS BETWEEN CAMSHAFT
POSITION SENSOR AND ECM CONNEC-
TOR.
Measure the resistance of harness between
camshaft position sensor connector and
engine ground.
Connector & terminal
(€15) No. 2
-
Engine ground:
I
CHECK CONDITION OF CAMSHAFT POSI-
TlON SENSOR.
1
CHECK CAMSHAFT POSITION SENSOR.
1)Remove the camshaft position sensor.
2)Measure the resistance between connector
terminals of camshaft position sensor.
Terminals
NO. 1 -NO. 2:
Check
j
the resistance more than
00 kR?
;
the resistance less than 10
2?
3
the resistance less than 5
l?
s
the camshaft position sensor
istallation bolt tightened
,ecu rely?
3
the resistance between 1
md 4 kR?
Yes
3epair harness
md connector.
JOTE:
n this case, repair
he following:
Open circuit in
iarness between
:amshaft position
iensor and ECM
:onnector
Poor contact in
iCM connector
Poor contact in
:oupling connector
821)
3epair ground
;hort circuit in har-
less between
:amshaft position
iensor and ECM
:onnector.
JOTE:
ihe harness be-
ween both con-
lectors are
ihielded. Repaii
lround short circuil
n harness togeth-
?r with shield.
So to step 4.
So to step 5.
3epair poor con-
act in camshaft
)osition sensor
:onnector.
No
30 to step 2.
30 to step 3.
3epair harness
ind connector.
JOTE:
n this case, repai
he following:
'
Open circuit in
iarness between
:amshaft position
Sensor and ECM
:onnector
I
Poor contact in
ECM connector
1
Poor contact in
:oupling connect0
B21)
righten camshaft
iosition sensor
nstallation bolt
;ecurely.
3eplace the cam-
;haft position sen.
;or. <Ref. to
;amshaft Position
Sensor.>
W(SOHC)-29,
EN(S0HC)-179