Subaru Legacy 2002 Service Manual page 632

DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)
No.
1 CHECK ANY OTHER DTC ON DISPLAY.
2 CHECK ENGINE COOLANT TEMPERA-
TURE.
1) Start the engine and warm it up completely.
2) Measure engine coolant temperature using
Subaru Select Monitor or OBD-II general scan
tool.
NOTE:
¼ Subaru Select Monitor
For detailed operation procedure, refer to the
"READ CURRENT DATA FOR ENGINE".
<Ref. to EN-34, Subaru Select Monitor.>
¼ OBD-II general scan tool
For detailed operation procedures, refer to the
OBD-II General Scan Tool Instruction Manual.
Step
Does the Subaru Select
Monitor or OBD-II general
scan tool indicate DTC
P0112, P0113, P0117,
P0118 or P0125?
Is the engine coolant tem-
perature between 75°C
(167°F) and 95°C (203°F)?
EN-115
Check Yes
Inspect DTC
P0112, P0113,
P0117, P0118 or
P0125 using "17.
List of Diagnostic
Trouble Code
(DTC)". <Ref. to
EN-82, List of
Diagnostic
Trouble Code
(DTC).>
NOTE:
In this case, it is
not necessary to
inspect DTC
P0111.
Replace intake air
temperature and
pressure sensor.
<Ref. to FU-37,
Intake Air Tem-
perature and
Pressure Sensor.>
Engine (Diagnostics)
No
Go to step 2.
Inspect DTC
P0125 using "17.
List of Diagnostic
Trouble Code
(DTC)". <Ref. to
EN-82, List of
Diagnostic
Trouble Code
(DTC).>