Subaru Forester 2004 Service Manual page 99

Diagnostic Procedure with Diagnostic Trouble Code (DTC)
ENGINE (DIAGNOSTIC)
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? Replace the
EN(H4DOTC 2.5)-98
Yes
Repair the harness
engine coolant and connector.
temperature sen-
NOTE:
sor. <Ref. to
In this case repair
FU(H4DOTC 2.5)-
the following:
26, Engine Cool-
• Open circuit in
ant Temperature
harness between
Sensor.>
ECM and engine
coolant tempera-
ture sensor con-
nector
• Poor contact in
engine coolant
temperature sen-
sor connector
• Poor contact in
ECM connector.
• Poor contact in
coupling connector
• Poor contact in
joint connector
No