Subaru Legacy 2005 Service Manual page 1331

Hide thumbs Also See for Legacy 2005:
Table of Contents

Advertisement

Diagnostic Procedure with Diagnostic Trouble Code (DTC)
Step
1
CHECK CURRENT DATA.
1) Start the engine.
2) Read the data of engine coolant tempera-
ture sensor signal using Subaru Select Monitor
or general scan tool.
NOTE:
• Subaru Select Monitor
For detailed operation procedure, refer to
"READ CURRENT DATA FOR ENGINE". <Ref.
to EN(H4DOTC)(diag)-24, Subaru Select Mon-
itor.>
• General scan tool
For detailed operation procedure, refer to the
general scan tool operation manual.
2
CHECK HARNESS BETWEEN ENGINE
COOLANT TEMPERATURE SENSOR AND
ECM CONNECTOR.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from engine cool-
ant temperature sensor.
3) Turn the ignition switch to ON.
4) Read the data of engine coolant tempera-
ture sensor signal using Subaru Select Monitor
or general scan tool.
NOTE:
• Subaru Select Monitor
For detailed operation procedure, refer to
"READ CURRENT DATA FOR ENGINE". <Ref.
to EN(H4DOTC)(diag)-24, Subaru Select Mon-
itor.>
• General scan tool
For detailed operation procedure, refer to the
general scan tool operation manual.
Check
Is the engine coolant tempera-
ture more than 120°C (248°F)?
Is the engine coolant tempera-
ture less than −40°C (−40°F)?
EN(H4DOTC)(diag)-91
ENGINE (DIAGNOSTICS)
Yes
Go to step 2.
Repair the poor
contact.
NOTE:
In this case, repair
the following:
• Poor contact in
engine coolant
temperature sen-
sor
• Poor contact in
ECM
• Poor contact in
coupling connector
• Poor contact in
joint connector
Replace the
Repair the ground
engine coolant
short circuit of har-
temperature sen-
ness between
sor. <Ref. to
engine coolant
FU(H4DOTC)-22,
temperature sen-
Engine Coolant
sor and ECM con-
Temperature Sen-
nector.
sor.>
No

Advertisement

Table of Contents
loading

Table of Contents