Subaru IMPREZA 2002 Service Manual page 399

DIAGNOSTICS FOR ENGINE STARTING FAILURE
ENGINE (DIAGNOSTICS)
Step
CHECK POWER SUPPLY TO EACH FUEL
INJECTOR.
1)Turn the ignition switch to OFF.
2)Disconnect the connector from #I cylinder
fuel injector.
3)Turn the ignition switch to ON.
4)Measure the power supply voltage between
the fuel injector terminal and engine ground.
#1 (€5) No. 2 (+)
-
Engine ground (-):
#2 (E 16) No. 2 (+)
-
Engine ground ( - ) :
#3 (€6) No. 2 (+)
-
Engine ground ( - ) :
#4 (E17) No. 2 (+)
-
Engine ground ( - ) :
Connector & terminal
,
CHECK HARNESS BETWEEN ECM AND
FUEL INJECTOR CONNECTOR.
1)Disconnect the connector from ECM.
2)Measure the resistance of harness between
ECM and fuel injector connector.
Connector & terminal
(8134) NO. 4
-
(8136) NO. 2:
I
CHECK HARNESS BETWEEN ECM AND
FUEL INJECTOR CONNECTOR.
Measure the resistance of harness between
ECM and fuel injector connector.
Connector & terminal
(8134) No. 4
-
Chassis ground:
1
CHECK HARNESS BETWEEN ECM AND
FUEL INJECTOR CONNECTOR.
Measure the resistance of harness between
ECM and fuel injector connector.
Connector & terminal
( 8 134) NO. 13
-
( 8 136) NO. 2 :
i
CHECK HARNESS BETWEEN ECM AND
FUEL INJECTOR CONNECTOR.
Measure the resistance of harness between
ECM and fuel injector connector.
Connector & terminal
(8134) No. 13
-
Chassis ground:
Check
j
the voltage more than 10 V?
;
the resistance between 5
wd 20
a?
s the resistance less than 1
2?
s the resistance between 5
n d 20
a?
s
the resistance less than 1
;2?
Yes
io to step 3.
;o to
step 4.
iepair ground
;hart
circuit in har-
less between
X M and fuel
ijector connector.
;o
to step 6.
3epair ground
;hort circuit in har-
less between
X M and fuel
njector connector.
No
3epair harness
and connector.
VOTE:
n this case, repair
:he following:
1
Open circuit in
iarness between
nain relay and fuel
njector connector
1
Poor contact in
nain relay connec-
:or
Poor contact in
:oupling connector
lB22)
Poor contact in
bel injector con-
lector
Repair harness
m d connector.
NOTE:
In this case, repait
the following:
Open circuit in
iarness between
ECM and fuel
Injector connector
Poor contact in
2oupling connector
Go to step 5.
Repair harness
and connector.
NOTE:
In this case, repaii
the following:
Open circuit in
harness between
ECM and fuel
injector connector
8
Poor contact in
coupling connector
Go to step 7.
(822)
EN(SOHC)-75