Subaru 2002 IMPREZA Service Manual page 433

DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)
ENGINE (DIAGNOSTICS)
s there poor contact in ECM
:onnector?
s the voltage more than 10 V?
s the resistance less than 1
n?
s there poor contact in ECM
:onnector?
Step
CHECK OUTPUT SIGNAL FROM ECM.
1)Turn the ignition switch to OFF.
2)Connect the test mode connector at the
lower portion of instrument panel (on the
driver's side), to the side of the center console
box.
3)Turn the ignition switch to ON.
4)While operating the purge control solenoid
valve, measure voltage between ECM and
chassis ground.
NOTE:
Purge control solenoid valve operation can be
executed using Subaru Select Monitor. For pro-
cedure, refer to "Compulsory Valve Operation
Check Mode". <Ref. to EN(D0HC TURBO)-50,
Compulsory Valve Operation Check Mode.>
Connector & terminal
(6137) No. 16 (+)
-
Chassis ground (-):
CHECK OUTPUT SIGNAL FROM ECM.
1)Turn the ignition switch to ON.
2)Measure the voltage between ECM and
chassis ground.
Connector & terminal
CHECK
POOR
CONTACT.
Check poor contact in ECM connector.
(6137) No. 16 (+)
-
Chassis ground (-):
Repair poor con-
tact in ECM con-
nector.
Repair battery
short circuit in har,
ness between
ECM and purge
control solenoid
valve connector.
After repair,
replace the ECM.
<Ref. to FU(D0HC
Engine Control
Module.>
Replace the purge
control solenoid
valve <Ref. to
EC(D0HC
TURBO)-7, Purge
Control Solenoid
Valve.> and ECM
<Ref. to FU(D0HC
Engine Control
Module.>
Repair poor con-
tact in ECM con-
nector.
TURBO)-47,
TURBO)-47,
CHECK HARNESS BETWEEN PURGE CON-
TROL SOLENOID VALVE AND ECM CON-
N ECTO R.
1)Turn the ignition switch to OFF.
2)Disconnect the connector from purge control
solenoid valve.
3)Turn the ignition switch to ON.
4)Measure the voltage between ECM and
chassis ground.
Connector & terminal
(6137) No. 16 (+)
-
Chassis ground (-):
CHECK PURGE CONTROL SOLENOID
VALVE.
1)Turn the ignition switch to OFF.
2)Measure the resistance between purge con-
trol solenoid valve terminals.
Terminals
NO. 1 -NO. 2:
CHECK POOR CONTACT.
Check poor contact in ECM connector.
Check
)etween 0 and 10 V?
s
-----I-
the voltage more than 10 V? Go to step 4.
No
Even if MIL light
up, the circuit has
returned to a nor-
mal condition at
this time. In this
case, repair poor
:ontact in ECM
sonnector.
Go to step
3 .
Replace the ECM.
<Ref. to FU(D0HC
Engine Control
Module.>
Go
to step 5.
TURBO)-47,
Go to step 6 .
Replace the ECM.
<Ref. to FU(D0HC
Engine Control
Module.>
TURBO)-47,
EN(D0HC TURBO)-209