Subaru 2002 IMPREZA Service Manual page 583

DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)
ENG I NE (D I AG NOSTl CS)
Step
CHECK HARNESS BETWEEN ECM AND
TCM CONNECTOR.
1)Turn the ignition switch to ON.
2)Measure the voltage between ECM and
chassis ground.
Connector & terminal
(6135)
No.
20 (+)
-
Chassis ground ( - ) :
!
CHECK HARNESS BETWEEN ECM AND
TCM CONNECTOR.
1)Turn the ignition switch to OFF.
2)Disconnect the connector from ECM and
TCM.
3)Measure the resistance of harness between
ECM and chassis ground.
Connector & terminal
(6135)
No.
20
-
Chassis ground:
CHECK OUTPUT SIGNAL FOR ECM.
1)Connect the connector to ECM.
2)Turn the ignition switch to ON.
3)Measure the voltage between ECM and
chassis ground.
I
Connector & terminal
(6135) No. 20 (+)
-
Chassis ground ( - ) :
CHECK TROUBLE CODE FOR AUTOMATIC
TRANSMISSION.
Read the trouble code for automatic transmis-
sion. <Ref. to AT-24, Read Diagnostic Trouble
Code (DTC).>
I
Check
Is the voltage less than 1 V?
Is the resistance less than
10
R?
Is the voltage more than 5 V?
Does the trouble code appear
for automatic transmission?
Yes
30 to step 2.
3epair ground
;hort circuit in har-
less between
ICM and TCM
:onnector.
i o
to step 4.
nspect trouble
:ode for automatic
ransmission.
:Ref. to AT-44,
liagnostic Proce-
jure with Diagnos-
ic Trouble Code
DTC).>
No
Even if MIL lights
~ p , the circuit has
eturned to a nor-
nal condition at
his time.
\IOTE:
n this case, repaii
he following:
'
Poor contact in
X M connector
'
Poor contact in
TCM connector
30 to step 3 .
3epair poor con-
act in ECM con-
lector.
3eplace the TCM.
:Ref. to AT-45,
rransmission Con-
rol Module
TCM).>
EN(D0HC TURBO)-359