Subaru IMPREZA 2002 Service Manual page 151

I
DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
Yes
20
to step 2.
Step
CHECK HARNESS CONNECTOR BETWEEN
TCM AND TRANSMISSION.
1)Turn the ignition switch to OFF.
2)Disconnect the connector from TCM and
transmission.
3)Measure the resistance of harness between
TCM and transmission connector.
Connector & terminal
Non-turbo model
Turbo model
(B55) NO. 5
-
(B1
1 ) NO. 1 7 :
(B55) NO. 1 8
-
(B1 1 ) NO. 1 7 :
CHECK HARNESS CONNECTOR BETWEEN
TCM AND TRANSMISSION.
Measure the resistance of harness between
TCM and transmission connector.
Connector & terminal
Non-turbo model
Turbo model
(B55) NO. 21
-
(Bll) NO. 1 8 :
(854) NO. 1 0
-
(B 1 1)
NO. 1 8 :
1
CHECK HARNESS CONNECTOR BETWEEN
TCM AND TRANSMISSION.
Measure the resistance of harness between
TCM and transmission connector.
Connector & terminal
Non-turbo model
Turbo model
(B55) No. 21
-
Chassis ground:
(854) No, 1 0
-
Chassis ground:
CHECK HARNESS CONNECTOR BETWEEN
TCM AND TRANSMISSION.
Measure the resistance of harness between
TCM and transmission connector.
Connector & terminal
Non-turbo model
Turbo model
(B55) No. 5
-
Chassis ground:
(B55) No. 1 8
-
Chassis ground:
I
CHECK FRONT VEHICLE SPEED SENSOR.
Measure the resistance between transmission
connector receptacle's terminals.
Connector & terminal
(T4) NO.
17-
NO.
1 8 :
i
PREPARE OSCILLOSCOPE.
I
PREPARE SUBARU SELECT MONITOR.
No
Repair open circuit
in harness
between TCM and
transmission con-
nector.
Check
Is the resistance less than 1
R?
30 to step 3 .
30 to step 4.
Is the resistance less than 1
R?
Repair open circuit
in harness
between TCM and
transmission con-
nector, and poor
contact in cou-
pling connector.
Repair short circuit
in harness
between TCM and
transmission con-
I s
the resistance more than 1
MR?
30 to step 5.
30 to step
6 .
'
30 to step 9.
30
to step 10.
Is the resistance more than 1
MR?
Repair short circuit
in harness
between TCM and
transmission con-
nector, and poor
contact in
cou-
pling connector.
Replace the front
vehicle speed sen.
sor. <Ref. to AT-32,
Front Vehicle
Speed Sensor.>
Go to step 7.
Go to step 8.
Is the resistance between 450
and 650 R?
Do you have an oscilloscope?
Do you have a Subaru Select
Monitor?
nector.
AT-59