Subaru 2002 IMPREZA Service Manual page 363

DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)
ENGINE (DIAGNOSTICS)
Yes
i o to step 2.
G o to step
3 .
~~
Step
CHECK CURRENT DATA.
1)Start the engine.
2)Read the data of throttle position sensor sig.
nal using Subaru Select Monitor or OBD-ll
general scan tool.
NOTE:
*Subaru Select Monitor
For detailed operation procedure, refer to the
"READ CURRENT DATA FOR ENGINE. <Ref.
to EN(D0HC TURBO)-38, Subaru Select Mon
itor.>
*OBD-ll general scan tool
For detailed operation procedures, refer to the
OBD-ll General Scan Tool Instruction Manual.
No
Even if MIL lights
up, the circuit has
returned
to
a nor-
mal condition at
this time. A tempo-
rary poor contact
of the connector
may be the cause.
NOTE:
In this case, repair
the following:
Poor contact in
throttle position
sensor connector
Poor contact in
ECM connector
Poor contact in
coupling connector
Repair harness
and connector.
NOTE:
In this case, repaii
the following:
Open circuit in
harness between
throttle position
sensor and ECM
connector
Poor contact in
coupling connectot
Poor contact in
joint connector
CHECK HARNESS BETWEEN THROlTLE
POSITION SENSOR AND ECM CONNEC-
TOR.
1)Turn the ignition switch to OFF.
2)Disconnect the connector from throttle posi-
tion sensor.
3)Measure the resistance of harness between
throttle position sensor connector and engine
ground.
Connector & terminal
(E 13) No. 2
-
Engine ground:
CHECK HARNESS BETWEEN THROTTLE
POSITION SENSOR AND ECM CONNEC-
TOR.
1)Turn the ignition switch to ON.
2)Measure the voltage between throttle posi-
tion sensor connector and engine ground.
(E13) No. 3 (+) -Engine ground (-):
Connector & terminal
Check
;
the value more than 4.9 V?
5
the resistance less than 5
l?
s h e voltage more than 4.9 b
Aepair battery
short circuit in har-
ness between
throttle position
sensor and ECM
connector. After
repair, replace the
ECM. <Ref. to
FU(D0HC
Engine Control
Module.>
TURBO)-47,
Replace the throt-
tle position sen-
sor. <Ref. to
FU(D0HC
Throttle Position
Sensor.>
TURBO)-33,
EN(D0HC TURBO)-139