Subaru 2002 IMPREZA Service Manual page 1275

DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)
Step
1 CHECK ANY OTHER DIAGNOSTIC TROU-
BLE CODE (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(TURBO)-34, Subaru Select Moni-
tor.>
•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 between 75°C (167°F)
and 95°C (203°F)?
EN(TURBO)-115
ENGINE (DIAGNOSTICS)
Yes
Inspect the rele- Go to step 2.
vant DTC using
"List of Diagnostic
Trouble Code
(DTC)". <Ref. to
EN(TURBO)-75,
List of Diagnostic
Trouble Code
(DTC).>
NOTE:
In this case, it is
not necessary to
inspect DTC
P0111.
Replace the mass Inspect the DTC
air flow and intake P0125 using "List
air temperature of Diagnostic
sensor. <Ref. to Trouble Code
FU(TURBO)-34, (DTC)". <Ref. to
Mass Air Flow and EN(TURBO)-75,
Intake Air Temper- List of Diagnostic
ature Sensor.> Trouble Code
(DTC).>
No