Subaru IMPREZA 2002 Service Manual page 416

DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)
ENG
IN E
(DIAGNOSTICS)
Yes
30 to step 8.
3epair harness
md connector.
UOTE:
n this case, repair
he following:
1
Open circuit in
iarness between
Step
CHECK POWER SUPPLY TO REAR OXY-
GEN SENSOR.
1)Turn the ignition switch to OFF.
2)Disconnect the connector from rear oxygen
sensor.
3)Turn the ignition switch to ON.
4)Measure the voltage between rear oxygen
sensor connector and engine ground or chas-
sis ground.
Connector & terminal
(E25) No. 2 (+)
-
Chassis ground (-):
No
Repair power sup-
ply line.
NOTE:
In this case, repai
the following:
Open circuit in
harness between
main relay and
rear oxygen sen-
sor connector
Poor contact in
rear oxygen sen-
sor connector
Poor contact in
coupling connectoi
(El
1
Replace the rear
oxygen sensor.
<Ref. to
FU(SOHC)-45,
Rear Oxygen Sen
SOT. >
I
CHECK REAR OXYGEN SENSOR.
1)Turn the ignition switch to OFF.
2)Measure the resistance between rear oxy-
gen sensor connector terminals.
Terminals
NO. 1
-
NO. 2:
Check
s the voltage more than 10 V?
s
the resistance less than 30
2?
EN(S0HC)-92