Subaru IMPREZA 2002 Service Manual page 220

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SYMPTOM RELATED DIAGNOSTIC
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
Symptom
Vehicle does not start in any shift range (engine revving up).
Vehicle does not start in "R" range only (engine rewing up).
,Vehicle does not start in "R" range only (engine stalls).
Vehicle does not start in "D", " 3 range only (engine rewing up).
Vehicle does not start in "D",
" 3
or "2" range only (engine rev-
vina up).
Vehicle does not start in "D", " 3 or " 2 range only (engine
stalls).
Vehicle starts in "R" range only (engine revving up).
Acceleration during standing starts is poor (high stall rpm).
Acceleration during standing starts is poor (low stall rpm).
Acceleration is poor when the select lever is in "D", " 3 or " 2
range (normal stall rpm).
Acceleration is poor when the select lever is in "R" (normal stall
rpm).
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No shift occurs from 1st to 2nd gear.
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'roblem parts
Strainer
1
Line pressure duty solenoid
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Control valve
1
Drive pinion
1
Hypoid gear
1
Axle shaft
1
Differential gear
1
Oil pump
1
Input shaft
b
Output shaft
b
Planetary gear
b
Drive plate
b
ATF level too low
b
Front gasket transmission case
b
Select cable
b
Select lever
.
Control valve
b
Low & reverse clutch
.
Reverse clutch
Low clutch
.
2-4 brake
.
Planetary gear
.
Parking brake mechanism
-
Low clutch
* One-wav clutch
Low clutch
.
Reverse clutch
Control valve
Control valve
Low clutch
Reverse clutch
ATF level too low
Front gasket transmission case
Differential gear oil level too high or too low
Oil pump
Torque converter one-way clutch
Engine performance
TCM
Control valve
High clutch
2-4 brake
Planetary gear
Control valve
High clutch
2-4 brake
Planetary gear
TCM
Rear vehicle speed sensor
Front vehicle speed sensor
Throttle position sensor
Shift solenoid 1
Control valve
2-4 brake
No shift occurs from 2nd to 3rd gear.
TCM
Control valve
High clutch
Shift solenoid 2