Subaru IMPREZA 2002 Service Manual page 94

BASIC DIAGNOSTIC PROCEDURE
I
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
1. Basic Diagnostic Procedure
A: PROCEDURE
Step
CHECK PRE-INSPECTION.
1)Ask the customer when and how the trouble
occurred using the interview checklist. <Ref. to
AT-4, Check List for Interview.>
2)Before performing diagnosis, inspect the fol-
lowing items which might influence the AT
problems.
*General inspection <Ref. to AT-5, INSPEC-
TION, General Description.>
*Oil leak
*Stall speed test <Ref. to AT-I 3, Stall Test.>
*Line pressure test <Ref. to AT-16, Line Pres-
sure Test.>
*Transfer clutch pressure test <Ref. to AT-I 8,
Transfer Clutch Pressure Test.>
*Time lag test <Ref. to AT-1 5, Time Lag Test.>
*Road test <Ref. to AT-12, Road Test.>
*Inhibitor switch <Ref. to AT-28, Inhibitor
Switch.>
CHECK AT OIL TEMP WARNING LIGHT.
Turn the ignition switch to ON.
CHECK AT OIL TEMP WARNING LIGHT.
1)Turn the ignition switch to OFF.
2)Repair the AT OIL TEMP warning light circuit
or power supply and ground line circuit.
<Ref. to AT-31, Diagnostic Procedure for AT
OIL TEMP Warning Light.>
3)Turn the ignition switch to ON.
CHECK INDICATION OF DTC.
Calling up the diagnostic trouble code (DTC).
Without SUBARU SELECT MONITOR
<Ref. to AT-24, WITHOUT SUBARU SELECT
MONITOR, Read Diagnostic Trouble Code
(DTC).>
With SUBARU SELECT MONITOR
<Ref. to AT-25, WITH SUBARU SELECT
MONITOR, Read Diagnostic Trouble Code
(DTC).>
NOTE:
If the communication function of the selec
monitor cannot be executed normally, check
the communication circuit. <Ref. to AT-39
POSSIBLE, Diagnostic Procedure for Selec
Monitor Communication.>
COMMUNICATION FOR INITIALIZING IM.
Check
j
the unit that might influence
l e AT problem normal?
)oes not the AT OIL TEMP
iarning light light up?
j
the AT OIL TEMP warning
ght flashing?
j
the diagnostic trouble code
DTC) displayed?
Yes
;o to step 2.
$0
to step
3 .
$0
to step 4.
20 to step 6.
JOTE:
3ecord all diag
iostic trouble code
DTC).
No
3epair or replace
?ach item.
30 to step 4.
30
to step 5.
30 to step 5.
AT-2