Subaru IMPREZA 2002 Service Manual page 155

I
DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)
I
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
Step
I CHECK TORQUE CONVERTER TURBINE
SPEED SENSOR.
1)Turn the ignition switch to OFF.
2)Disconnect the connector from transmission.
3)Measure the resistance between transmis-
sion connector receptacle's terminals.
Connector & terminal
(T4) NO.
14
-
NO.
15:
!
CHECK HARNESS CONNECTOR BETWEEN
TCM AND TRANSMISSION.
1)Disconnect the connector from TCM.
2)Measure the resistance of harness between
TCM and transmission connector.
Connector & terminal
Non-turbo model
Turbo model
(B55) NO. 1 2
-
(Bll) NO. 14:
(B55)
NO. 8
-
(Bll)
NO. 14:
t
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 5 :
(B55)
NO. 9
-
(B1 1) NO. 1 5 :
I 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. 21
-
Chassis ground:
(B55) No. 9
-
Chassis ground:
I
CHECK HARNESS CONNECTOR BETWEEN
TCM AND TRANSMISSION.
Measure the resistance of harness between
TCM and chassis ground.
Connector & terminal
Non-turbo model
Turbo model
5 PREPARE OSCILLOSCOPE.
7 PREPARE SUBARU SELECT MONITOR.
(B55) No.
1 2
-
Chassis ground:
(B55) No. 8
-
Chassis ground:
Check
Is the resistance between 450
and 650 Q?
Is the resistance less than 1
Q?
Is the resistance less than 1
Q?
Is the resistance more than 1
MQ?
Is the resistance more than 1
MQ?
Do you have an oscilloscope?
Do you have a Subaru Select
Monitor?
Yes
;o to step 2.
; o to step
3.
$0
to step 4.
;o
to step 5.
20 to step 6.
;o to step 10.
; o to step
9.
No
Replace the tur-
bine speed sensor.
<Ref. to AT-36,
Torque Converter
Turbine Speed
Sensor.>
Repair open circuit
in harness
between TCM and
transmission con-
nector.
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-
nector.
Repair short circuit
in harness
between TCM and
transmission con-
nector, and poor
contact in cou-
pling connector.
Go to step 7.
Go to step
8.
AT-63