Subaru 2002 IMPREZA Service Manual page 429

DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)
E NG I N E ( D I AG NOSTl
CS)
Step
CHECK OUTPUT SIGNAL FROM ECM.
1)Turn the ignition switch to ON.
2)Measure the voltage between ECM and
chassis ground.
Connector & terminal
(B 137) No. 16 (+)
-
Chassis ground ( - ) :
!
CHECK HARNESS BETWEEN PURGE CON.
TROL SOLENOID VALVE AND ECM CON-
NECTOR.
1)Turn the ignition switch to OFF.
2)Disconnect the connectors from purge con-
trol solenoid valve and ECM.
3)Measure the resistance of harness between
purge control solenoid valve connector and
engine ground.
Connector & terminal
(E4) No. 2
-
Engine ground:
1
CHECK HARNESS BETWEEN PURGE CON,
TROL SOLENOID VALVE AND ECM CON-
NECTOR.
Measure the resistance of harness between
ECM and purge control solenoid valve of har-
ness connector.
Connector & terminal
(6137) NO. 16
-
(E4)
NO.
2:
I CHECK PURGE CONTROL SOLENOID
VALVE.
1)Remove the purge control solenoid valve.
2)Measure the resistance between purge con-
trol solenoid valve terminals.
Terminals
NO. 1 -NO. 2 :
> CHECK POWER SUPPLY TO PURGE CON-
TROL SOLENOID VALVE.
1)Turn the ignition switch to ON.
2)Measure the voltage between purge control
solenoid valve and engine ground.
Connector & terminal
(E4) No.
1
(+)
-
Engine ground (-):
Check
5
the voltage more than 10 V?
s the resistance less than 10
2?
s the resistance less than
1
2?
s
the resistance between 10
2nd 100 Q?
s the voltage more than 10 V?
Yes
Even if MIL lights
up, the circuit has
returned to a nor-
mal condition at
this time. Contact
with SOA (distribu-
tor) service.
NOTE:
Inspection by DTW
is required, be.
cause probable
cause is deteriora,
tion of multiple
parts.
Repair ground
short circuit in har-
ness between
ECM and purge
control solenoid
valve connector.
Go to step 4.
20 to step 5.
; o to step
6.
No
S o to step 2.
20 to step 3 .
3epair open circuit
n harness
letween ECM and
)urge control sole-
ioid valve connec-
or.
rlOTE:
n this case, repair
he following:
Open circuit in
iarness between
X M and purge
:ontrol solenoid
ialve connector
Poor contact in
:oupling connectoi
3eplace the purge
:ontrol solenoid
ialve. <Ref. to
IC(D0HC
TURBO)--/, Purge
2ontrol Solenoid
Jake.>
3epair open circuit
n harness
letween main
'elay and purge
:ontrol solenoid
ialve connector.
EN(D0HC TURBO)-205