Subaru Legacy 2004 Service Manual page 2603

Diagnostic Procedure without Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
Step
1 CHECK BODY INTEGRATED UNIT.
Check DTC of body integrated unit.
2 CHECK TCM.
Check DTC of TCM.
3 CHECK TCM.
1) Turn the ignition switch to OFF.
2) Connect the Subaru Select Monitor to data
link connector.
3) Turn the ignition switch to ON. (engine
OFF)
4) Turn the Subaru Select Monitor switch to
ON.
5) Shift the select lever to manual mode side,
and then shift down the select lever.
6) Read the indicator.
4 CHECK TCM.
1) Shift up the select lever.
2) Read the indicator.
5 CHECK BODY INTEGRATED UNIT.
Read the data of gear position using Subaru
Select Monitor.
6 CHECK COMBINATION METER.
Check
Is DTC of AT CAN communica-
tion circuit displayed?
Is DTC of AT CAN communica-
tion circuit displayed?
Is gear position 1 and "L" dis-
played?
Is gear position 2 and "M" dis-
played?
Is SPORT shift gear position
2?
Is the SPORT shift indicator
OK?
5AT(diag)-144
Yes
Perform the diag- Go to step 2.
nosis according to
DTC.
Perform the diag- Go to step 3.
nosis according to
DTC.
Go to step 4. Replace the TCM.
<Ref. to 5AT-61,
Transmission Con-
trol Module
(TCM).>
Go to step 5. Replace the TCM.
<Ref. to 5AT-61,
Transmission Con-
trol Module
(TCM).>
Refer to "General Check the body
Diagnostic Table". integrated unit.
<Ref. to 5AT(diag)- <Ref. to SL-46,
147, General Diag- Body Integrated
nostic Table.> Unit.>
Refer to "General Replace the com-
Diagnostic Table". bination meter
<Ref. to 5AT(diag)- assembly. <Ref. to
147, General Diag- IDI-16, Combina-
nostic Table.> tion Meter Assem-
bly.>
No