Subaru LEGACY 2006 Manual page 162

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Diagnostic Procedure with Diagnostic Trouble Code (DTC)
Step
5 CHECK HARNESS BETWEEN ENGINE
COOLANT TEMPERATURE SENSOR AND
ECM CONNECTOR.
1) Turn the ignition switch to OFF.
2) Measure the resistance of harness
between engine coolant temperature sensor
connector and engine ground.
Connector & terminal
(E8) No. 1 — Engine ground:
Check
Is the resistance less than 5
Ω?
EN(H4SO)(diag)-125
ENGINE (DIAGNOSTICS)
Yes No
Replace the Repair the har-
engine coolant ness and connec-
temperature sen- tor.
sor. <Ref. to
NOTE:
FU(H4SO)-19,
In this case, repair
Engine Coolant
the following item:
Temperature Sen-
• Open circuit of
sor.>
harness between
ECM and engine
coolant tempera-
ture sensor con-
nector
• Poor contact of
engine coolant
temperature sen-
sor connector
• Poor contact in
ECM connector
• Poor contact of
coupling connector
• Poor contact of
joint connector