Subaru IMPREZA 2002 Service Manual page 485

DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)
ENGINE (DIAGNOSTICS)
j
the voltage more than 10 V?
5
the voltage more than 10 V?
s the voltage more than 4 V?
Step
CHECK CURRENT DATA.
1)Start the engine.
2)Read the data of fuel temperature sensor
signal using Subaru Select Monitor or OBD-ll
general scan tool.
NOTE:
*Subaru Select Monitor
For detailed operation procedure, refer to the
"READ CURRENT DATA FOR ENGINE. <Ref.
to EN(S0HC)-32, Subaru Select Monitor.>
*OBD-ll general scan tool
For detailed operation procedures, refer to the
OBD-ll General Scan Tool Instruction Manual.
Repair battery
short circuit in har-
ness between
ECM and fuel
pump connector.
Repair battery
short circuit in har-
ness between
ECM and fuel
pump connector.
Go to step 5.
CHECK HARNESS BETWEEN FUEL TEM-
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
connector and chassis ground.
Connector & terminal
(R58) No. 6 (+)
-
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. 6 (+)
-
Chassis ground ( - ) :
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. 6 (+)
-
Chassis ground (-):
Check
;the value less than -40°C (-
O'F)?
Yes
;o to step 2.
No
3epair poor con-
act.
\IOTE:
n this case, repaii
he following:
1
Poor contact in
uel pump connec-
or
1
Poor contact in
X M connector
1
Poor contact in
:oupling connec-
:ors (822, B98 and
Poor contact in
357)
oint connector
:B122)
30
to
step 3 .
Go to step 4.
Repair harness
and connector.
NOTE:
In this case, repai
the following:
Open circuit in
harness between
ECM and fuel
pump connector
Poor contact in
fuel pump connec
tor
Poor contact in
ECM connector
Poor contact in
coupling connec-
tors (898 and R5i
EN(S0HC)-161