Subaru 2002 IMPREZA Service Manual page 1406

DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)
ENGINE (DIAGNOSTICS)
Step
5 CHECK HARNESS BETWEEN EXHAUST
GAS TEMPERATURE SENSOR AND ECM
CONNECTOR.
1)Turn the ignition switch to OFF.
2)Measure the resistance of harness between
exhaust gas temperature sensor connector
and engine ground.
Connector & terminal
(B279) No. 2 — Engine ground:
Check
Is the resistance less than 5
Ω?
EN(TURBO)-246
Yes
Replace the Repair the har-
exhaust gas tem- ness and connec-
perature sensor. tor.
<Ref. to
NOTE:
FU(TURBO)-48,
In this case, repair
Exhaust Tempera-
the following:
ture Sensor.>
• Open circuit in
harness between
ECM and exhaust
gas temperature
sensor connector
• Poor contact in
exhaust gas tem-
perature sensor
connector
• Poor contact in
ECM connector
• Poor contact in
joint connector
No