Subaru IMPREZA 2004 Service Manual page 26

Diagnostic Procedure with Diagnostic Trouble Code (DTC)
Step
1 CHECK ANY OTHER DTC ON DISPLAY.
2 CHECK ENGINE COOLANT TEMPERA-
TURE.
1)Start the engine and warm it up completely.
2)Measure the engine coolant temperature
using Subaru Select Monitor or OBD-II general
scan tool.
NOTE:
•Subaru Select Monitor
For detailed operation procedure, refer to the
"READ CURRENT DATA FOR ENGINE".
<Ref. to EN(H4SO)(diag)-32, Subaru Select
Monitor.>
•OBD-II general scan tool
For detailed operation procedures, refer to the
OBD-II General Scan Tool Instruction Manual.
Check
Is any other DTC displayed?
Is the engine coolant tempera-
ture 75°C (167°F) — 95°C
(203°F)?
EN(H4SO)(diag)-103
ENGINE (DIAGNOSTICS)
Yes
Inspect DTC using Go to step 2.
"List of Diagnostic
Trouble Code
(DTC)". <Ref. to
EN(H4SO)(diag)-
74, List of Diag-
nostic Trouble
Code (DTC).>
NOTE:
In this case, it is
not necessary to
inspect
DTC P0111.
Replace the intake Inspect DTC
air temperature P0125 using "List
sensor. <Ref. to of Diagnostic
FU(H4SO)-34, Trouble Code
Intake Air Temper- (DTC)". <Ref. to
ature Sensor.> EN(H4SO)(diag)-
74, List of Diag-
nostic Trouble
Code (DTC).>
No