Subaru Legacy 2002 Service Manual page 1393

DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)
Engine (DIAGNOSTICS)
No.
8 CHECK ENGINE COOLANT TEMPERA-
TURE 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.
NOTE:
¼ Subaru Select Monitor
For detailed operation procedure, refer to the
"READ CURRENT DATA FOR ENGINE".
<Ref. to EN(H6)-38, Subaru Select Monitor.>
¼ OBD-II general scan tool
For detailed operation procedures, refer to the
OBD-II General Scan Tool Instruction Manual.
9 CHECK INTAKE MANIFOLD PRESSURE
SENSOR.
1) Start the engine and warm-up engine until
coolant temperature is greater than 75°C
(167°F).
2) Place the shift lever in neutral position.
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.
NOTE:
¼ Subaru Select Monitor
For detailed operation procedure, refer to the
"READ CURRENT DATA FOR ENGINE".
<Ref. to EN(H6)-38, Subaru Select Monitor.>
¼ OBD-II general scan tool
For detailed operation procedure, refer to the
OBD-II General Scan Tool Instruction Manual.
Specification:
¼ Intake manifold absolute pressure
Ignition ON
73.3 — 106.6 kPa (550 — 800 mmHg,
21.65 — 31.50 inHg)
Idling
24.0 — 41.3 kPa (180 — 310 mmHg,
7.09 — 12.20 inHg)
Step
Is temperature greater than
75°C (167°F)?
Is the value within the
specifications?
EN(H6)-186
Check Yes
Go to step 9.
Go to step 10.
No
Replace engine
coolant tempera-
ture sensor. <Ref.
to FU(H6)-29,
Engine Coolant
Temperature Sen-
sor.>
Replace intake
manifold pressure
sensor. <Ref. to
FU(H6)-34, Intake
Manifold Pressure
Sensor.>