Subaru IMPREZA 2002 Service Manual page 621

DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)
ENGINE (DIAGNOSTICS)
No
Go to step 3.
Step
CHECK ANY OTHER DTC ON DISPLAY.
Repair harness
and connector.
NOTE:
In this case, repai
the following:
Open circuit in
harness between
ECM connector
and engine grounc
terminal
Poor contact in
ECM connector
Poor contact in
coupling connectc
(822)
Replace the ECM
<Ref. to
1
~ o ~ e ~ > C ) - 4 7 ~ Engine Control
CHECK GROUND CIRCUIT FOR ECM.
1)Turn the ignition switch to OFF.
2)Measure the resistance between ECM con-
nector and chassis ground.
Connector & terminal
(8134)
No. 7
-
Chassis ground:
CHECK HARNESS BETWEEN ECM AND
IDLE AIR CONTROL SOLENOID VALVE
CONNECTOR.
1)Turn the ignition switch to OFF.
2)Disconnect the connector from idle air con-
trol solenoid valve.
3)Turn the ignition switch to ON.
4)Measure the voltage between ECM connec-
tor and chassis ground.
Connector & terminal
DTC P1511; (8134) No. 5 (+)
-
Chassis
ground (-):
DTC P1513; (8134)
No.
6 (+)
-
Chassis
ground (-):
DTC P1515; (8134) No.
19
(+)
-
Chassi!
ground (-):
DTC P1517; (8134)
No.
20 (+)
-
Chassi!
ground (-):
~
Check
oes the Subaru Select Moni-
'r or OBD-ll general scan tool
dicate DTC P1511, P1513,
151 5 and P1517 at same
ne?
the resistance less than 5
?
;
the voltage more than 10 V?
Yes
20 to step 2.
30 to step 3.
Repair battery
short circuit in har
ness between
ECM and idle air
control solenoid
valve connector.
After repair,
replace the ECM.
<Ref. to
Engine Control
Module.>
FU(SOHC)-47,
EN(S0HC)-297