Subaru Legacy 2003 Service Manual page 1955

DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)
ENGINE (DIAGNOSTICS)
8 CHECK INTAKE AIR TEMPERATURE SEN-
SOR.
1) Start the engine and warm-up engine until
coolant temperature is greater than 60°C
(140°F).
2) Place the shift lever in neutral position.
3) Turn the A/C switch to OFF.
4) Turn all accessory switches to OFF.
5) Open the front hood.
6) Measure the ambient temperature.
7) Read the data of intake manifold pressure
sensor signal using Subaru Select Monitor.
Is the value obtained when ambient tem-
perature is subtracted from intake air tem-
perature within the specified range?
NOTE:
For detailed operation procedure, refer to the
"READ CURRENT DATA FOR ENGINE". <Ref.
to EN(H4DOSTC)-26, Subaru Select Monitor.>
Step
EN(H4DOSTC)-116
Value
−10°C (14°F) — 50°C (122°F) Contact SUBARU
Yes
Check the mass
distributor service. air flow and intake
air temperature
NOTE:
sensor. <Ref. to
Inspection by DTM
FU(H4DOSTC)-
is required, be-
33, Mass Air Flow
cause probable
and Intake Air
cause is deteriora-
Temperature Sen-
tion of multiple
sor.>
parts.
No