Subaru IMPREZA 2002 Service Manual page 197

I
DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
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. 3
-
(B11) NO. 19:
(B55) NO. 24
-
(B11) NO. 19:
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
-
(B11) NO. 20:
(B54)
NO.
19
-
( 6 1 1) NO.
20:
CHECK HARNESS CONNECTOR BETWEEN
TCM AND TRANSMISSION.
Measure the resistance of harness between
TCM and chassis ground.
Connector & terminal
Non-turbo model
Turbo model
(B55)
No. 3
-
Chassis ground:
(655)
No.
24
-
Chassis ground:
CHECK HARNESS CONNECTOR BETWEEN
TCM AND TRANSMISSION.
Measure the resistance of harness between
TCM and chassis ground.
Connector & terminal
Non-turbo model
Turbo model
(655) No. 21
-
Chassis ground:
(B54) No. 19
-
Chassis ground:
CHECK REAR VEHICLE SPEED SENSOR.
Measure the resistance between transmission
connector receptacle's terminals.
Connector & terminal
(T4) NO. 19
-
NO. 20:
PREPARE OSCILLOSCOPE.
PREPARE SUBARU SELECT MONITOR.
Check
s the resistance less than 1
2?
s the resistance less than
1
2?
s the resistance more than 1
Uln?
s
the resistance more than 1
w n ?
s the resistance between
450
and 650 Q?
l o
you have an oscilloscope?
30 you have a Subaru Select
Monitor?
Yes
20 to step 2.
; o to step 3 .
30 to step 4.
30 to step 5.
30 to step 6.
30 to step 10.
30 to step 9.
No
Repair open circuit
in harness
between TCM and
transmission con-
nector.
Repair open circuit
in harness
between TCM and
transmission, and
poor contact in
coupling connec-
tor.
Repair short circuit
in harness
between TCM and
transmission con-
nector.
Repair short circuit
in harness
between TCM and
transmission con-
nector.
Replace the rear
vehicle speed sen.
sor. <Ref. to AT-
35, Rear Vehicle
Speed Sensor.>
Go to step 7.
Go to step 8.
AT-I 05