Subaru IMPREZA 2002 Service Manual page 425

DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)
ENGINE IDIAGNOSTICS)
Yes
Go
to
step 2.
Step
I
CHECK OUTPUT SIGNAL FROM ECM.
1)Turn the ignition switch to ON.
2)Measure the voltage between ECM and
chassis ground.
Connector & terminal
(8134) No. 24 (+)
-
Chassis ground (-):
!
CHECK OUTPUT SIGNAL FROM ECM.
1)Turn the ignition switch to OFF.
2)Disconnect the connector from air assist
injector solenoid valve.
3)Turn the ignition switch to ON.
4)Measure the voltage between ECM and
chassis ground.
Connector & terminal
(8134) No. 24 (+)
-
Chassis ground (-):
No
Go to step 3.
3
CHECK OUTPUT SIGNAL FROM ECM.
Measure the voltage between ECM and chas-
sis ground.
Connector & terminal
(8134) No. 24 (+)
-
Chassis ground
( - ) I
Repair battery
short circuit in har-
ness between
ECM and air assist
injector solenoid
valve connector.
After repair,
replace the ECM.
FU(S0HC)-47,
Engine Control
Module.>
Repair battery
short circuit in har-
ness between
ECM and air assist
injector solenoid
valve connector.
After repair,
replace the ECM.
<Ref. to
FU(S0HC)-47,
Engine Control
Module. >
<Ref. to
Check
s
the voltage more than 10 V?
Replace the air
assist injector
solenoid valve
<Ref. to
FU(S0HC)-37, Air
Assist Injector
Solenoid Valve.>
and ECM <Ref. to
Engine Control
Module.>
Contact with SOA
(distributor) ser-
vice.
NOTE:
lnsepction by DTh
is required, be
cause probablc
cause is deteriora
tion of multipli
parts.
FU( S0HC)-47,
s the voltage more than 10 V?
Ioes the voltage change more
han 10 V by shaking harness
md connector of ECM while
nonitoring the value with volt-
3ge meter?
EN(S0HC)-101