Subaru Legacy 2003 Service Manual page 563

DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)
ENGINE (DIAGNOSTICS)
9 CHECK ENGINE COOLANT TEMPERATURE
SENSOR.
1) Start the engine and warm-up completely.
2) Read data of engine coolant temperature
sensor signal using Subaru Select Monitor
or OBD-II general scan tool.
Is the measured value within the specified
range?
NOTE:
•Subaru Select Monitor
For detailed operation procedure, refer to the
"READ CURRENT DATA FOR ENGINE".
<Ref. to EN(H4SO)-32, Subaru Select Moni-
tor.>
•OBD-II general scan tool
For detailed operation procedures, refer to the
OBD-II General Scan Tool Instruction Manual.
10 CHECK INTAKE MANIFOLD PRESSURE
SENSOR SIGNAL.
1) Start the engine and warm-up engine until
coolant temperature is greater than 60°C
(140°F).
2) Place the selector lever in "N" or "P" posi-
tion.
3) Turn A/C switch to OFF.
4) Turn all accessory switches to OFF.
5) Read data of intake manifold pressure sen-
sor signal using Subaru Select Monitor or
OBD-II general scan tool.
Is the measured value within the specified
range?
NOTE:
•Subaru Select Monitor
For detailed operation procedure, refer to the
"READ CURRENT DATA FOR ENGINE".
<Ref. to EN(H4SO)-32, Subaru Select Moni-
tor.>
•OBD-II general scan tool
For detailed operation procedures, refer to the
OBD-II General Scan Tool Instruction Manual.
Step
EN(H4SO)-166
Value
70 - 100°C (158 - 212°F)
Idling 24.0 - 41.3 kPa (180 -
310 mmHg, 7.09 - 12.20 inHg),
Ignition ON 73.3 - 106.6 kPa
(550 - 800 mmHg, 21.65 -
31.50 inHg)
Yes
Go to step 10. Replace engine
coolant tempera-
ture sensor. <Ref.
to FU(H4SO)-26,
Engine Coolant
Temperature Sen-
sor.>
Contact SUBARU Replace intake air
distributor service. temperature and
pressure sensor.
NOTE:
<Ref. to
Inspection by DTM
FU(H4SO)-32,
is required, be-
Pressure Sensor.>
cause probable
cause is deteriora-
tion of multiple
parts.
No