Subaru IMPREZA 2002 Service Manual page 147

I
DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
No
Repair short circuit
n harness
Detween TCM and
throttle position
sensor connector.
Step
CHECK HARNESS CONNECTOR BETWEEN
TCM AND THROTTLE POSITION SENSOR.
Measure the resistance of harness between
TCM connector and chassis ground.
Connector & terminal
Non-turbo model
Turbo model
(655) No. 2
-
Chassis ground:
(654) No. 3
-
Chassis ground:
CHECK HARNESS CONNECTOR BETWEEN
TCM AND THROTTLE POSITION SENSOR.
Measure the resistance of harness between
TCM connector and chassis ground.
Connector & terminal
Non-turbo model
Turbo model
(655) No. 1
-
Chassis ground:
(654) No. 2
-
Chassis ground:
I
CHECK HARNESS CONNECTOR BETWEEN
TCM AND ECM.
Measure the resistance of harness between
TCM and ECM connector.
Connector & terminal
Non-turbo model
Turbo model
(655) NO. 2
-
(6136) NO. 17:
(654) NO. 3
-
(6135) NO. 7:
0 CHECK HARNESS CONNECTOR BETWEEN
TCM AND ECM.
Measure the resistance of harness between
TCM and ECM connector.
Connector & terminal
Non-turbo model
Turbo model
(655) NO. 1
-
(6136) NO. 15:
(654) NO. 2
-
(6135) NO. 9:
I1 PREPARE SUBARU SELECT MONITOR.
Repair short circuit
in harness
between TCM and
throttle position
sensor connector.
1 2
CHECK INPUT SIGNAL FOR TCM.
1)Connect the connectors to TCM, throttle
position sensor and ECM.
2)Turn the ignition switch to ON (engine OFF)
3)Close the throttle completely.
4)Measure the voltage between TCM connec-
tor and chassis ground.
Connector & terminal
Non-turbo model
Turbo model
(655) No. 2 (+)
-
Chassis ground ( - ) :
(654) No. 3 (+)
-
Chassis ground (-):
13
CHECK INPUT SIGNAL FOR TCM.
1)Open the throttle completely.
2)Measure the voltage between TCM connec-
tor and chassis ground.
Connector & terminal
Non-turbo model
Turbo model
(655) No. 2 (+)
-
Chassis ground (-):
(654) No. 3 (+)
-
Chassis ground ( - ) :
Check
s the resistance more than 1
A n ?
s the resistance more than 1
dR?
s the resistance less than 1
2?
Is the resistance less than 1
n?
Do you have a Subaru Select
Monitor?
Is the voltage between approx.
0.5 V in throttle fully closed?
Is the voltage between approx.
4.3 V with throttle fully open?
Yes
o step 8.
o
step 9.
o step 10.
to step 11.
to step 14.
to step 13.
to step 16.
Repair open circuit
in harness
between TCM and
ECM connector.
Repair open circuit
in harness
between TCM and
ECM connector.
Go to step 12.
Go to step 18.
AT-55