Subaru Legacy 2003 Service Manual page 517

DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)
ENGINE (DIAGNOSTICS)
5 CHECK HARNESS BETWEEN INTAKE AIR
TEMPERATURE SENSOR AND ECM CON-
NECTOR.
1) Turn ignition switch to OFF.
2) Measure resistance of harness between
intake air temperature and pressure sensor
connector and engine ground.
Connector & terminal
(E20) No. 2 — Engine ground:
Is the measured value less than the speci-
fied value?
Step
EN(H4SO)-120
Value
5 Ω
Yes
Replace intake air Repair harness
temperature sen- and connector.
sor. <Ref. to
NOTE:
FU(H4SO)-33,
In this case, repair
REMOVAL, Intake
the following:
Air Temperature
• Open circuit in
Sensor.>
harness between
intake air tempera-
ture sensor and
ECM connector
• Poor contact in
intake air tempera-
ture sensor
• Poor contact in
ECM
• Poor contact in
coupling connector
• Poor contact in
joint connector
No