Subaru 2002 IMPREZA Service Manual page 551

DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)
ENGINE (DIAGNOSTICS)
Yes
lepair poor con-
act in ECM con-
'ector.
iepair ground
hort circuit in har-
less between
C M and fuel tank
lressure control
olenoid valve
onnector.
; o to step 5.
i o to step 6.
i o to step 7.
Step
CHECK POOR CONTACT.
Check poor contact in ECM connector.
No
Contact with SOA
(distributor) ser-
vice.
NOTE:
Inspection by DTk
is required, be,
cause probable
cause is deteriora,
tion of multiple
parts.
Go to step 4.
Repair harness
and connector.
NOTE:
In this case, repai
the following:
Open circuit in
harness between
ECM and fuel tank
pressure control
solenoid valve
connector
Poor contact in
coupling connec-
tors
Replace the fuel
tank pressure con.
trol solenoid valve.
<Ref. to EC(D0HC
TURBO)-12, Pres.
sure Control Sole-
noid Valve.>
Repair harness
and connector.
NOTE:
In this case, repai
the following:
Open circuit in
harness between
main relay and fuel
tank pressure con,
trol solenoid valve
connector
Poor contact in
coupling connec-
tors
Poor contact in
main relay connec
tor
CHECK HARNESS BETWEEN FUEL TANK
PRESSURE CONTROL SOLENOID VALVE
AND ECM CONNECTOR.
1)Turn the ignition switch to OFF.
2)Disconnect the connectors from fuel tank
pressure control solenoid valve and ECM.
3)Measure the resistance of harness between
fuel tank pressure control solenoid valve con-
nector and chassis ground.
Connector & terminal
(R68) No. 2
-
Chassis ground:
CHECK HARNESS BETWEEN FUEL TANK
PRESSURE CONTROL SOLENOID VALVE
AND ECM CONNECTOR.
Measure the resistance of harness between
ECM and fuel tank pressure control solenoid
valve connector.
Connector & terminal
(8137) NO. 22
-
(R68) NO. 2:
CHECK FUEL TANK PRESSURE CONTROL
SOLENOID VALVE.
Measure the resistance between fuel tank
pressure control solenoid valve terminals.
Terminals
NO. 1 -NO. 2:
CHECK POWER SUPPLY TO FUEL TANK
PRESSURE CONTROL SOLENOID VALVE.
1)Turn the ignition switch to ON.
2)Measure the voltage between fuel tank pres
sure control solenoid valve and chassis
ground.
Connector & terminal
(R68) No. 1 (+)
-
Chassis ground ( - ) :
Check
s there poor contact in ECM
:onnector?
s the resistance less than 10
2?
s the voltage less than 1 R?
s the resistance between 10
md 100
R?
s the voltage more than 10 V?
EN(D0HC TURBO)-327