Subaru IMPREZA 2002 Service Manual page 489

DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)
ENGINE (DIAGNOSTICS)
Step
CHECK ANY OTHER DTC ON DISPLAY.
!
CHECK OUTPUT SIGNAL FROM ECM.
1)Turn the ignition switch to ON.
2)Measure the voltage between ECM connec-
tpr and chassis ground on faulty cylinders.
Connector & terminal
#1 (8134) No. 4 (+)
-
Chassis
ground ( - ) :
#2 (B 134) No. 13 (+)
-
Chassis
ground (-):
#3 (8 134) No. 14 (+)
-
Chassis
ground (-):
#4 (8134) No. 15 (+)
-
Chassis
ground
( - ) I
CHECK HARNESS BETWEEN FUEL INJEC-
TOR AND ECM CONNECTOR.
1)Turn the ignition switch to
OFF:
2)Disconnect the connector from fuel injector
on faulty cylinders.
3)Measure the voltage between ECM connec-
tor and engine ground on faulty cylinders.
#1 (€5) No. 1
-
Engine ground:
#2 (€16) No.
1
-
Engine ground:
#3 (€6) No. 1
-
Engine ground:
#4 (€1 7) No. 1
-
Engine ground:
Connector & terminal
I
CHECK HARNESS BETWEEN FUEL INJEC-
TOR AND ECM CONNECTOR.
Measure the resistance of harness connector
between ECM connector and fuel injector on
faulty cylinders.
Connector & terminal
#1(8134) NO. 4
-
(ES)
NO.
1:
#2 (8134) NO. 13
-
(€16) NO. 1:
#3 (B 134) NO. 14
-
(E6) NO. 1:
#4 (8134) NO. 15
-
(E17)
NO.
1:
.
> CHECK FUEL INJECTOR.
Measure the resistance between fuel injector
terminals on faulty cylinder.
Terminals
NO. 1 -NO. 2:
Check
)oes the Subaru Select Moni-
3r
or OBD-II general scan tool
idicate DTC P0106, P0107,
'01 08, PO1 17, PO1 18 or
'01 25?
s
the voltage more than 10 V?
s the resistance less than 10
2?
s the resistance less than
1
3?
s the resistance between 5
md 20
a?
~
Yes
nspect DTC
'01 06, PO1 07,
)0108, PO117,
)0118 or PO1 25
ising "List of Diag-
iostic Trouble
:ode (DTC)".
:Ref. to
.ist of Diagnostic
[rouble Code
DTC) .
>
JOTE:
n this case, it iz
lot necessary tc
nspect DTC
)0301, PO302
)0303 and P0304.
30 to step 7.
!N(SOHC)-77,
3epair ground
short circuit in har-
less between fuel
njector and ECM
:onnector.
30 to step 5.
30 to step 6.
No
i o to step 2.
i o to step
3.
i o to step 4.
3epair harness
ind connector.
JOTE:
n this case, repai
he following:
Open circuit in
iarness between
ICM and fuel
njector connector
Poor contact in
:oupling connecto,
822)
3eplace the faulty
uel injector. <Ref.
%el Injector.>
o FU(S0HC)-38,
EN(SOHC)-165