Subaru LEGACY 2006 Manual page 157

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Diagnostic Procedure with Diagnostic Trouble Code (DTC)
ENGINE (DIAGNOSTICS)
Step
5 CHECK HARNESS BETWEEN INTAKE AIR
TEMPERATURE SENSOR AND ECM CON-
NECTOR.
1) Turn the ignition switch to OFF.
2) Measure the resistance of harness
between intake air temperature sensor con-
nector and engine ground.
Connector & terminal
(B3) No. 5 — Engine ground:
Check
Is the resistance less than 5
Ω?
EN(H4SO)(diag)-120
Yes No
Replace the intake Repair the har-
air temperature ness and connec-
sensor. <Ref. to tor.
FU(H4SO)-25,
NOTE:
Mass Air Flow and
In this case, repair
Intake Air Temper-
the following item:
ature Sensor.>
• Open circuit in
harness between
intake air tempera-
ture sensor and
ECM connector
• Poor contact in
intake air tempera-
ture sensor
• Poor contact in
ECM
• Poor contact of
coupling connector
• Poor contact of
joint connector