Subaru Legacy 2002 Service Manual page 1394

DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)
No.
10 CHECK INTAKE AIR TEMPERATURE SEN-
SOR.
1) Start the engine and warm-up engine until
coolant temperature is greater than 75°C
(167°F).
2) Place the shift lever in neutral position.
3) Turn A/C switch to OFF.
4) Turn all accessory switches to OFF.
5) Open front hood.
6) Measure ambient temperature.
7) Read data of intake manifold pressure sen-
sor signal using Subaru Select Monitor or
OBD-II general scan tool.
NOTE:
¼ Subaru Select Monitor
For detailed operation procedure, refer to the
"READ CURRENT DATA FOR ENGINE".
<Ref. to EN(H6)-38, Subaru Select Monitor.>
¼ OBD-II general scan tool
For detailed operation procedure, refer to the
OBD-II General Scan Tool Instruction Manual.
Step
Is value obtained when
ambient temperature is
subtracted from intake air
temperature greater than
−10°C (14°F) and less than
50°C (122°F)?
EN(H6)-187
Check Yes
Contact your
Subaru distributor.
NOTE:
Inspection by
DTM is required,
because probable
cause is deterio-
ration of multiple
parts.
Engine (DIAGNOSTICS)
No
Check intake air
temperature sen-
sor. <Ref. to
FU(H6)-35, Intake
Air Temperature
Sensor.>