Subaru IMPREZA 2002 Service Manual page 617

DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)
ENGINE (DIAGNOSTICS)
Yes
io to step 2.
$0
to step
3.
Go to step 4.
Step
CHECK POWER SUPPLY TO IDLE AIR CON-
TROL SOLENOID VALVE.
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 idle air control
solenoid valve connector and engine ground.
(E7) No.
2
(+)
-
Engine ground (-):
Connector & terminal
No
Repair harness
and connector.
NOTE:
In this case, repair
the following:
Open circuit in
harness between
idle air control
solenoid valve and
main relay connec-
tor
Poor contact in
coupling connector
Repair harness
and connector.
NOTE:
In this case, repai
the following:
Open circuit in
harness between
idle air control
solenoid valve and
main relay connec
tor
Poor contact in
coupling connect0
(822)
Repair harness
and connector.
NOTE:
In this case, repal
the following:
Open circuit in
harness between
ECM and idle air
control solenoid
valve connector
Poor contact in
coupling connectc
(821)
(822)
CHECK POWER SUPPLY TO IDLE AIR CON-
TROL SOLENOID VALVE.
Measure the voltage between idle air control
solenoid valve connector and engine ground.
(E7) No. 5 (+)
-
Engine ground
( - ) I
Connector & terminal
Check
s the voltage more than 10 V?
CHECK HARNESS BETWEEN ECM AND
IDLE AIR CONTROL SOLENOID VALVE
CONNECTOR.
1)Turn the ignition switch to OFF.
2)Measure the resistance between ECM and
idle air control solenoid valve connector.
Connector & terminal
DTC
P1510; (8134)
NO.
5
-
(E7)
NO.
4:
DTC
P1512; (8134)
NO.
6
-
(E7)
NO.
1:
DTC
P1514; (8134)
NO. 19
-
(E7)
NO. 6:
DTC
P1516; (8134)
NO.
20
-
(E7)
NO. 3:
s the voltage more than 10 V?
CHECK HARNESS BETWEEN ECM AND
IDLE AIR CONTROL SOLENOID VALVE
CONNECTOR.
1)Disconnect the connector from ECM.
2)Measure the resistance between ECM con-
nector and chassis ground.
Connector & terminal
DTC
P1510; (8134)
No.
5
-
Chassis
ground:
DTC P1512; (8134) No. 6
-
Chassis
ground:
DTC
P1514; (8134)
No.
19
-
Chassis
ground:
DTC P1516; (8134) No. 20
-
Chassis
ground:
Is the resistance less than 10
a?
. .
Repair ground
short circuit in har-
ness between
ECM and idle air
control solenoid
valve connector.
Go to step
5.
s the resistance less than 1
I?
EN(S0HC)-293