Subaru Legacy III (2000-2003 year). Manual - part 567
AT-2
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
BASIC DIAGNOSTIC PROCEDURE
1. Basic Diagnostic Procedure
A: PROCEDURE
Step
Value
Yes
No
1
CHECK PRE-INSPECTION.
1) Ask the customer when and how the trou-
ble occurred using interview checklist.
<Ref. to AT-5, Check List for Interview.>
2) Before performing diagnosis, inspect the
following items which might influence the
AT problems.
•General inspection <Ref. to AT-6, INSPEC-
TION, General Description.>
•Oil leak
•Stall speed test <Ref. to AT-33, Stall Test.>
•Line pressure test <Ref. to AT-36, Line Pres-
sure Test.>
•Transfer clutch pressure test <Ref. to AT-38,
Transfer Clutch Pressure Test.>
•Time lag test <Ref. to AT-35, Time Lag Test.>
•Road test <Ref. to AT-32, Road Test.>
•Inhibitor switch <Ref. to AT-47, INSTALLA-
TION, Transmission Mounting System.>
Is unit that might influence the AT problem
normal?
Unit is normal.
Repair or replace
each item.
2
CHECK POWER INDICATOR LIGHT.
Turn ignition switch to ON.
Does not the POWER indicator light light up?
Indicator light flashes.
3
CHECK POWER INDICATOR LIGHT.
1) Turn ignition switch to OFF.
2) Repair POWER indicator light circuit or
power supply and ground line circuit.
<Ref. to AT-30, Diagnostic Procedure for
POWER Indicator Light.>
3) Turn ignition switch to ON.
Is the POWER indicator light flashing?
Indicator light flashes.
4
CHECK INDICATION OF DTC.
Calling up the DTC.
Without Subaru Select Monitor
<Ref. to AT-24, WITHOUT SUBARU SELECT
MONITOR, OPERATION, Read Diagnostic
Trouble Code (DTC).>
With Subaru Select Monitor
<Ref. to AT-25, WITH SUBARU SELECT
MONITOR, OPERATION, Read Diagnostic
Trouble Code (DTC).>
NOTE:
If the communication function of the select
monitor cannot be executed normally, check
the communication circuit. <Ref. to AT-38,
COMMUNICATION FOR INITIALIZING IM-
POSSIBLE, Diagnostic Procedure for Select
Monitor Communication.>
Is the DTC displayed?
DTC is displayed.
NOTE:
Record all DTCs.