Subaru 2002 IMPREZA Service Manual page 359

DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)
ENGINE IDIAGNOSTICS)
Yes
30 to step 2.
30
to step 4.
3epair poor con-
act in ECM con-
lector.
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-II 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, repar
the following:
Poor contact in
throttle position
sensor connector
Poor contact in
ECM connector
Poor contact in
coupling connectc
Go to step
3 .
Contact with SOA
(distributor) ser-
vice.
NOTE:
Inspection by DTL
is required, be
cause probabll
cause is deteriora
tion
of
multipll
parts.
!
CHECK INPUT SIGNAL FOR ECM.
Measure the voltage between ECM connector
and chassis ground while throttle valve is fully
closed.
Connector & terminal
(6135) No. 9 (+)
-
Chassis ground ( - ) :
CHECK JNPUT SIGNAL FOR ECM.
Measure the voltage between ECM connector
and chassis ground.
I
Connector & terminal
(6135) No. 9 (+)
-
Chassis ground ( - ) :
I
CHECK INPUT SIGNAL FOR ECM.
Measure the voltage between ECM connector
and chassis ground.
Connector & terminal
(8135) No. 7 (+)
-
Chassis ground ( - ) :
1
CHECK INPUT SIGNAL FOR ECM. (USING
SUBARU SELECT MONITOR.)
Measure the voltage between ECM connector
and chassis ground.
Check
s
the value less than 0.1
V?
s the voltage more than 4.5 V'
Ioes the voltage change more
han 4.5 V by shaking harness
ind connector of ECM while
nonitoring the value with volt-
ige meter?
s
the voltage less than 0.1 V?
joes the voltage change more
han 0.1 V by shaking harness
md connector of ECM while
nonitoring the value with Sub-
kru Select Monitor?
act in ECM con-
lector.
EN(D0HC TURB0)-135