Subaru 2006 Legacy, Manual

Page: 3487 / 4302

4AT(diag)-2
Basic Diagnostic Procedure
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
1. Basic Diagnostic Procedure
A: PROCEDURE
Step Check Yes No
1 CHECK PRE-INSPECTION.
1) Ask the customer when and how the trou-
ble occurred using the interview check list.
<Ref. to 4AT(diag)-4, Check List for Interview.>
2) Before performing diagnosis, inspect the
following items which may influence AT prob-
lems.
• General Inspection <Ref. to 4AT(diag)-5,
INSPECTION, General Description.>
• Disconnection of harness connector
• Visual check for harness damage
• Oil leaks
• Stall speed test <Ref. to 4AT-30, Stall Test.>
• Line pressure test <Ref. to 4AT-33, Line
Pressure Test.>
• Transfer clutch pressure test <Ref. to 4AT-
34, Transfer Clutch Pressure Test.>
• Time lag test <Ref. to 4AT-32, Time Lag
Test.>
• Road test <Ref. to 4AT-29, Road Test.>
• Inhibitor switch <Ref. to 4AT-46, Inhibitor
Switch.>
Is the unit that might influence
the AT problem normal? Go to step 2 . Repair or replace
each item.
2 CHECK SPORT INDICATOR LIGHT.
Start the engine and wait for 2 seconds or
more.
Is the SPORT indicator light
blinking? Go to step
4
. Go to step
3
.
3 CHECK SPORT INDICATOR LIGHT.
1) Turn the ignition switch to OFF.
2) Check the SPORT indicator light.
<Ref. to 4AT(diag)-21, INSPECTION, SPORT
Indicator Light Display.>
3) Turn the ignition switch to ON and wait for
at least 2 seconds.
4) Start the engine.
Does the SPORT indicator
light blink? Go to step
4
. Go to step
5
.
4 CHECK DTC.
Display the DTC.
NOTE:
If the communication function of Subaru Select
Monitor cannot be executed normally, check
communication circuit. <Ref. to 4AT(diag)-23,
COMMUNICATION FOR INITIALIZING IM-
POSSIBLE, Diagnostic Procedure for Subaru
Select Monitor Communication.>
Is DTC displayed? Go to step 6 .
NOTE:
Record all DTC.
Go to step 5 .
5 PERFORM GENERAL DIAGNOSTICS.
1) Inspect using “Diagnostic Procedure with-
out Diagnostic Trouble Code (DTC)”. <Ref. to
4AT(diag)-90, Diagnostic Procedure without
Diagnostic Trouble Code (DTC).>
2) Inspect using “General Diagnostic Table”.
<Ref. to 4AT(diag)-101, Diagnostics with Phe-
nomenon.>
3) Perform the Inspection Mode.<Ref. to
4AT(diag)-18, Inspection Mode.>
4) Display the DTC.
Is DTC displayed? Go to step
6
. Finish the diagno-
sis.
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