Subaru 2002 IMPREZA Service Manual page 506

DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)
ENGINE (DIAGNOSTICS)
Step Check
resistance less than 1
SENSOR CONNECTOR.
1)Turn the ignition switch to OFF.
2)Measure the resistance of harness between
ECM connector and tumble generator valve
position sensor connector.
Connector & terminal
(8135) NO. 23
-
(E54) NO.
3 :
Yes
30 to step 7.
20 to step 8.
3epair ground
;hort circuit in har-
less between tum-
ile generator valve
iosition sensor
and ECM connec-
or.
No
Repair harness
and connector.
NOTE:
In this case, repai
the following:
Open circuit in
harness between
tumble generator
valve position sen-
sor and ECM con-
nector
Poor contact in
tumble generator
valve position sen-
sor connector
Poor contact in
ECM connector
Poor contact in
coupling connect0
Poor contact in
joint connector
Repair harness
and connector.
NOTE:
In this case, repai
the following:
Open circuit in
harness between
tumble generator
valve position sen-
sor and ECM con-
nector
Poor contact in
ECM connector
Poor contact in
tumble generator
valve position sen-
sor connector
Poor contact in
coupling connectoi
Go to step 9.
CHECK HARNESS BETWEEN ECM AND
TUMBLE GENERATOR VALVE POSITION
SENSOR CONNECTOR.
1)Turn the ignition switch to OFF.
2)Disconnect the connectors from tumble gen-
erator valve position sensor.
3)Turn the ignition switch to ON.
4)Measure the voltage between throttle posi-
tion sensor connector and engine ground.
(E54) No. 1 (+)
-
Engine ground ( - ) :
Connector & terminal
3epair poor con-
act in tumble gen-
?rator valve
iosition sensor
:onnector.
I
Is the voltage more than 4.5 VI;
Replace the tum-
ble generator valve
assembly. <Ref. to
FU(D0HC
TURBO)-40, Tum-
ble Generator
Valve Assembly.>
CHECK HARNESS BETWEEN ECM AND
TOR.
Measure the resistance of harness between
tumble generator valve position sensor con-
nector and engine ground.
Connector & terminal
CHECK POOR CONTACT.
Check poor contact in tumble generator valve
position sensor connector.
THROlTLE POSITION SENSOR CONNEC-
(E54)
No.
3
-
Engine ground:
EN(D0HC TURBO)-282
IS
the resistance less than 10
Q?
Is there poor contact in tumble
generator valve position sensor
connector?