Subaru 2002 IMPREZA Service Manual page 537

DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)
ENGINE (DIAGNOSTICS)
Check
loes the Subaru Select Moni-
or or OBD-ll general scan tool
ndicate DTC PO1 07, PO108 or
' 1 112?
4re there holes, loose bolts or
lisconnection of hose on air
ntake system?
s the value within the specifi-
Step
CHECK ANY OTHER DTC ON DISPLAY.
NOTE:
In this case, it is not necessary to inspect DTC
PO1 06.
Yes
Inspect DTC
PO107, PO108 or
P1112 using "List
of Diagnostic Trou
ble Code (DTC)".
<Ref. to EN(D0HC
TURBO)-80, List
of Diagnostic Trou
ble Code (DTC).>
Repair air intake
system.
Go to step 4.
CHECK AIR INTAKE SYSTEM.
s the throttle positioning ratio
CHECK PRESSURE SENSOR.
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 the selector lever in
"N" or " P position.
3)Turn the N C switch to OFF.
4)Turn all accessory switches to OFF.
5)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 Mom
itor.>
*OBD-II general scan tool
For detailed operation procedure, refer to the
OBD-II General Scan Tool Instruction Manual.
Specification:
*Intake manifold absolute pressure
Ignition ON
73.3
-
106.6 kPa (550
-
800 mmHg,
21.65
-
31.50 inHg)
20.0
-
46.7 kPa (150
-
350 mmHg,
5.91
-
13.78 inHg)
idling
CHECK THROTTLE POSITION.
Read the data of throttle position 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-ll general scan tool
For detailed operation procedure, refer to the
OBD-ll General Scan Tool Instruction Manual.
CHECK THROTTLE POSITION.
Go to step
5.
s the throttle positioning ratio
?qual to or more than 85%
vhen throttle is fully open?
Replace the pres-
sure sensor. <Ref.
to FU(D0HC
TURBO)-35, Pres-
sure Sensor.>
No
30 to step 2.
30 to step
3.
3eplace the pres-
iure sensor. <Ref.
o FU(D0HC
rURBO)-35, Pres.
;ure Sensor.>
idjust or replace
he throttle posi-
ion sensor. <Ref.
o
FU(D0HC
-hrottle Position
;ensor.>
-URBO)-33,
Ieplace the throt-
le position sen-
;or. <Ref. to
'U(D0HC
-hrottle Position
;ensor.>
-U RB0)-33,
EN(D0HC TURBO)-313