Subaru 2002 IMPREZA Service Manual page 351

DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)
ENGINE (DIAGNOSTICS)
Check
s the value greater than
i 50°C
302"F)?
s
the value less than -40°C (-
IO'F)?
Step
CHECK CURRENT DATA.
1 )Start the engine.
2)Read the data of engine coolant temperature
sensor signal using Subaru Select Monitor or
OBD-II general scan tool.
NOTE:
*Subaru Select Monitor
For detailed operation procedure, refer to the
"READ CURRENT DATA FOR ENGINE". <Ref.
to EN(D0HC TURBO)-38, Subaru Select Mon-
itor.>
*OBD-ll general scan tool
For detailed operation procedures, refer to the
OBD-ll General Scan Tool Instruction Manual.
Yes No
Go to step 2. Repair poor con-
tact.
NOTE:
In this case, repai
the following:
Poor contact in
engine coolant
temperature sen-
sor
Poor contact in
ECM
Poor contact in
coupling connect0
Poor contact in
joint connector
Replace the Repair ground
engine coolant short circuit in har.
temperature sen- ness between
sor. <Ref. to engine coolant
FU(D0HC temperature sen-
TURBO)-29, sor and ECM con-
Engine Coolant nector.
Temperature Sen-
CHECK HARNESS BETWEEN ENGINE
COOLANT TEMPERATURE SENSOR AND
ECM CONNECTOR.
1)Turn the ignition switch to OFF.
2)Disconnect the connector from engine cocl-
ant temperature sensor.
3)Turn the ignition switch to ON.
4)Read the data of engine coolant temperature
sensor signal using Subaru Select Monitor or
OBD-ll general scan tool.
NOTE:
*Subaru Select Monitor
For detailed operation procedure, refer to the
"READ CURRENT DATA FOR ENGINE. <Ref.
to EN(D0HC TURBO)-38, Subaru Select Mon-
itor.>
*OBD-ll general scan tool
For detailed operation procedures, refer to the
OBD-ll General Scan Tool Instruction Manual.
sor.>
EN(D0HC TURBO)-127