Subaru Legacy 2004 Service Manual page 2461

AUTOMATIC TRANSMISSION (DIAGNOSTICS)
1. Basic Diagnostics Procedure
A: PROCEDURE
Step
1 CHECK PRE-INSPECTION.
1) Ask the customer when and how the trou-
ble occurred using the interview checklist.
<Ref. to 5AT(diag)-4, Check List for Interview.>
2) Before performing diagnosis, inspect the
following items which might influence the AT
problems.
• General inspection <Ref. to 5AT(diag)-5,
INSPECTION, General Description.>
• Oil Leakage
• Stall speed test <Ref. to 5AT-31, Stall Test.>
• Line Pressure Test <Ref. to 5AT-34, Line
Pressure Test.>
• Transfer Clutch Pressure Test <Ref. to 5AT-
36, Transfer Clutch Pressure Test.>
• Time Lag Test <Ref. to 5AT-33, Time Lag
Test.>
• Road Test <Ref. to 5AT-30, Road Test.>
• Inhibitor Switch <Ref. to 5AT-51, Inhibitor
Switch.>
2 CHECK SPORT INDICATOR LIGHT.
After the ignition switch is turned to "ON", wait
for at least 2 seconds.
3 CHECK SPORT INDICATOR LIGHT.
1) Turn the ignition switch to OFF.
2) Check the SPORT indicator light. <Ref. to
5AT(diag)-24, INSPECTION, SPORT Indicator
Light Display.>
3) After the ignition switch is turned to ON,
wait for at least 2 seconds.
4 CHECK DTC.
Read the DTC. <Ref. to 5AT(diag)-19, OPERA-
TION, Read Diagnostic Trouble Code (DTC).>
NOTE:
If the communication function of the Subaru Se-
lect Monitor cannot be executed normally,
check the communication circuit. <Ref. to
5AT(diag)-26, COMMUNICATION FOR INI-
TIALIZING IMPOSSIBLE, Diagnostic Proce-
dure for Select Monitor Communication.>
5 PERFORM THE GENERAL DIAGNOSTICS.
1) Inspect using "Diagnostic Procedure with-
out Diagnostic Trouble Code (DTC)". <Ref. to
5AT(diag)-138, Diagnostic Procedure without
Diagnostic Trouble Code (DTC).>
2) Perform clear memory mode.
3) Perform the inspection mode. <Ref. to
5AT(diag)-20, Inspection Mode.>
4) Display DTC.
Basic Diagnostics Procedure
Is the unit that might influence
the AT problem normal?
Does the SPORT indicator
light illuminate?
Does the SPORT indicator
light blink?
Is DTC displayed?
Is DTC displayed?
5AT(diag)-2
Check Yes
Go to step 2.
Go to step 4.
Go to step 4.
Go to step 6.
NOTE:
Record all DTC.
Go to step 6.
No
Repair or replace
each item.
Go to step 3.
Go to step 5.
Go to step 5.
Inspect using
"General Diagnos-
tic Table". <Ref. to
5AT(diag)-147,
General Diagnos-
tic Table.>