Subaru Impreza 2003 Service Manual page 1274

DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)
ENGINE (DIAGNOSTICS)
Step
1 CHECK IDLE SWITCH SIGNAL.
1)Turn the ignition switch to ON.
2)Operate the LED operation mode for engine
using Subaru Select Monitor.
NOTE:
•Subaru Select Monitor
For detailed operation procedure, refer to the
"LED OPERATION MODE FOR ENGINE".
<Ref. to EN(H4DOTC)-32, Subaru Select Mon-
itor.>
2 CHECK ANY OTHER DTC ON DISPLAY.
3 CHECK CONDITION OF MANIFOLD ABSO-
LUTE PRESSURE SENSOR.
4 CHECK CONDITION OF THROTTLE BODY. Is the throttle body installation
Check
Does the LED of {Idle Switch
Signal} come on?
Is any other DTC displayed?
Is the manifold absolute pres-
sure sensor installation bolt
tightened securely?
bolt tightened securely?
EN(H4DOTC)-98
Yes
Go to step 2. Check the throttle
position sensor cir-
cuit. <Ref. to
EN(H4DOTC)-
124, DTC P0121
— THROTTLE/
PEDAL POSI-
TION SENSOR/
SWITCH "A" CIR-
CUIT RANGE/
PERFORMANCE
—, Diagnostic Pro-
cedure with Diag-
nostic Trouble
Code (DTC).>
NOTE:
In this case, it is
not necessary to
inspect
P0106.
Inspect the rele- Go to step 3.
vant DTC. "List of
Diagnostic Trou-
ble Code (DTC)".
<Ref. to
EN(H4DOTC)-75,
List of Diagnostic
Trouble Code
(DTC).>
NOTE:
In this case, it is
not necessary to
inspect DTC
P0106.
Go to step 4. Tighten the mani-
fold absolute pres-
sure sensor
installation bolt
securely.
Replace the mani- Tighten the throttle
fold absolute pres- body installation
sure sensor. <Ref. bolt securely.
to FU(H4DOTC)-
35, Manifold Abso-
lute Pressure Sen-
sor.>
No
DTC