Subaru 2002 IMPREZA Service Manual page 379

DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)
ENGINE (DIAGNOSTICS)
~~
Check
s value obtained when ambi-
?nt temperature is subtracted
rom intake air temperature
jreater than -10°C (14°F) and
ess than 50°C (122"F)?
Step
CHECK INTAKE AIR TEMPERATURE SEN-
SOR.
1)Start the engine and warm-up engine until
coolant temperature is greater than 60°C
(1
40°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 pressure sensor signal
using Subaru Select Monitor or OBD-ll general
scan tool.
NOTE:
*Subaru Select Monitor
For detailed operation procedure, refer to the
"READ CURRENT DATA FOR ENGINE". <Ref.
to EN(D0HC TURBO)-38, Subaru Select Mon-
itor.>
*OBD-I1 general scan tool
For detailed operation procedure, refer to the
OBD-I1 General Scan Tool Instruction Manual.
Yes No
Contact with SOA Check mass air
(distributor) ser- flow and intake air
vice. temperature sen-
NOTE: sor. <Ref. to
Inspection by DTM FU(D0HC
is required, be- TURBO)-34, Mass
cause probable Air Flow and
cause is deteriora- Intake Air Temper-
tion of multiple ature Sensor.>
parts,
I
I
EN(D0HC TURBO)-I55