Subaru Legacy 2004 Service Manual page 2342

Symptom
Vehicle does not start in any shift range. (Engine stalls)
Vehicle does not start in any shift range. (Engine operates)
Vehicle does not start in "R" range only. (Engine operates)
Vehicle does not start in "R" range only. (Engine stalls)
Vehicle does not start in "D" range. (Engine operates)
Vehicle does not start in "D" range. (Engine stalls)
Vehicle does not start in "R" range only. (Engine operates)
Acceleration during standing start is poor. (High rpm stall)
Acceleration during standing start is poor. (Low rpm stall)
Acceleration is poor when select lever is in "D" range. (Normal
rpm stall)
Acceleration is poor when select lever is in "R" range. (Normal
rpm stall)
No shift occurs from 1st to 2nd gear.
No shift occurs from 2nd to 3rd gear.
Diagnostics with Phenomenon
• Parking brake mechanism
• Planetary gear
• Strainer
• Line pressure linear solenoid
• Control valve
• Drive pinion
• Hypoid gear
• Axle shaft
• Differential gear
• Oil pump
• Input shaft
• Output shaft
• Planetary gear
• Drive plate
• ATF level too low.
• Front gasket of transmission case
• Select cable
• Select lever
• Line pressure linear solenoid
• Control valve
• Low & reverse clutch
• Reverse clutch
• Low clutch
• 2-4 brake
• Planetary gear
• Parking brake mechanism
• Low clutch
• One-way clutch
• Reverse clutch
• Control valve
• Control valve
• Low clutch
• Reverse clutch
• ATF level too low.
• ATF deterioration
• Front gasket of 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
• Control valve
• 2-4 brake
• TCM
• Control valve
• High clutch
4AT(diag)-139
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
Problem parts