Subaru 2002 Impreza - Page 385

DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)
ENGINE (DIAGNOSTICS)
Step Check
Yes
1)Start the engine.
2)Read the data
of fuel temperature sensor
signal using Subaru Select Monitor or OBD-II
general scan
tool.
NOTE:
*Subaru Select Monitor
For detailed operation procedure, refer
to the
"READ CURRENT DATA
FOR ENGINE". <Ref.
to EN(D0HC TURBO)-38, Subaru Select Mom
itor.>
*OBD-II general scan tool
For detailed operation procedures, refer to the
OBD-ll General Scan Tool Instruction Manual.
CHECK CURRENT DATA.
(-40" F)?
Is the value less than -40°C
\Go to step 2.
CHECK HARNESS BETWEEN FUEL TEM-
I Is the voltage more than 10 V?
PERATURE SENSOR AND ECM CONNEC-
TOR.
1)Turn the ignition switch to OFF.
2)Remove the access hole lid.
3)Disconnect the connector from fuel pump.
4)Measure the voltage between fuel pump
tonnector and chassis ground.
Connector & terminal
(R58)
No. 5 (+) - Chassis ground (-):
CHECK HARNESS BETWEEN FUEL TEM-
PERATURE SENSOR AND ECM CONNEC-
TOR.
1)Turn the ignition switch
to ON.
2)Measure the voltage between fuel pump
connector and chassis ground.
Connector & terminal
(R58) No. 5 (+) - Chassis ground (-):
I
CHECK HARNESS BETWEEN FUEL TEM-
PERATURE SENSOR AND ECM CONNEC-
TOR.
Measure the voltage between fuel pump con-
nector and chassis ground.
Connector & terminal
(R58) No. 5 (+) - Chassis ground (-):
I fiepair battery
Is the voltage more than 10 V?
Is the voltage more than 4 V?
short circuit in har.
ness between
ECM and fuel
pump connector.
short circuit in har,
ness between
ECM and fuel
pump connector.
No
3epair poor con-
act.
4OTE:
n this case, repaii
he following:
Poor contact in
uel pump connec-
or
Poor contact in
ICM connector
' Poor contact in
:oupling connec-
ors
Poor contact in
oint connector
30 to step 3.
30 to step 4.
3epair harness
ind connector.
\IOTE:
n this case, repaii
:he following:
1 Open circuit in
iarness between
ECM and fuel
xmp connector
1 Poor contact in
'uel pump connec-
:or
1 Poor contact in
XM connector
1 Poor contact in
:oupling connec-
:ors
EN(D0HC TURBO)-I61