Subaru 2002 IMPREZA Service Manual page 283

ENGINE MALFUNCTION INDICATOR LAMP (MIL)
ENGINE (DIAGNOSTICS)
_ _ _ _ _ ~
Step
CHECK STATUS OF CHECK ENGINE MAL-
FUNCTION INDICATOR LAMP (MIL).
1)Turn the ignition switch to OFF.
2)Disconnect the test mode connector.
3)Turn the ignition switch to ON. (engine OFF)
!
CHECK HARNESS BETWEEN COMBINA-
TlON METER AND ECM CONNECTOR.
1)Turn the ignition switch to OFF.
2)Disconnect the connector from ECM.
3)Turn the ignition switch to ON.
I CHECK HARNESS BETWEEN TEST MODE
CONNECTOR AND CHASSIS GROUND.
1)Turn the ignition switch to OFF.
2)Disconnect the connector from ECM.
3)Measure the resistance of harness between
test mode connector and chassis ground.
(876) No. 1
-
Chassis ground:
Connector & terminal
I CHECK POOR CONTACT.
Check poor contact in ECM connector.
i CHECK HARNESS BETWEEN ECM AND
TEST MODE CONNECTOR.
1)Connect the test mode connector.
2)Measure the resistance of harness between
ECM and chassis ground.
Connector & terminal
(8134)
No. 14
-
Chassis ground:
Check poor contact in ECM connector.
i CHECK POOR CONTACT.
Check
loes the MIL come on?
loes the MIL come on?
s
the resistance less than 1
n?
s there poor contact in ECM
:onnector?
s the resistance less than 1
R?
s there poor contact in ECM
:onnector?
Yes
io
to step 2.
3epair ground
;hort circuit in har-
less between
:ombination meter
ind ECM connec-
or.
i o
to step 4.
3epair poor con-
act in ECM con-
lector.
i o
to step 6.
No
Repair the MIL cir-
cuit. <Ref. to
EN(D0HC
CHECK ENGINE
MALFUNCTION
INDICATOR
LAMP (MIL)
DOES NOT
COME ON.,
Engine Malfunc-
tion Indicator
Lamp (MIL).>
Go to step 3.
TURBO)-54,
Repair harness
and connector.
NOTE:
In this case, repaii
the following:
Open circuit in
harness between
test mode connec-
tor and chassis
ground
Go to step 5.
Repair open circuit
in harness
between ECM and
test mode connec-
tor.
lector. TURBO)-47,
Engine Control
Module.>
EN(D0HC TURBO)-59