Subaru Legacy 2005 Service Manual page 2420

AUTOMATIC TRANSMISSION (DIAGNOSTICS)
1. Basic Diagnostic 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-32, Stall Test.>
• Line pressure test <Ref. to 5AT-35, Line
Pressure Test.>
• Transfer clutch pressure test <Ref. to 5AT-
36, Transfer Clutch Pressure Test.>
• Time lag test <Ref. to 5AT-34, Time Lag
Test.>
• Road test <Ref. to 5AT-31, 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)-25, INSPECTION, SPORT Indicator
Light Display.>
3) After the ignition switch is turned to ON,
wait for at least 2 seconds.
4 CHECK DTC.
Display DTC.
NOTE:
If the communication function of the Subaru Se-
lect Monitor cannot be executed normally,
check the communication circuit. <Ref. to
5AT(diag)-27, COMMUNICATION FOR INI-
TIALIZING IMPOSSIBLE, Diagnostic Proce-
dure for
Communication.>
5 PERFORM GENERAL DIAGNOSTICS.
1) Inspect using "Diagnostic Procedure with-
out Diagnostic Trouble Code (DTC)". <Ref. to
5AT(diag)-128, Diagnostic Procedure without
Diagnostic Trouble Code (DTC).>
2) Perform the clear memory mode.
3) Perform the inspection mode. <Ref. to
5AT(diag)-21, Inspection Mode.>
4) Display DTC.
Basic Diagnostic Procedure
Subaru Select Monitor
Check
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 on the Sub-
aru Select Monitor?
Is DTC displayed on the Sub-
aru Select Monitor?
5AT(diag)-2
Yes
Go to step 2. Repair or replace
each item.
Go to step 4. Go to step 3.
Go to step 4. Go to step 5.
Go to step 6. Go to step 5.
NOTE:
Record all DTC.
Go to step 6. Inspect using
"General Diagnos-
tic Table". <Ref. to
5AT(diag)-137,
General Diagnos-
tic Table.>
No