Subaru Legacy 2004 Service Manual page 2343

AUTOMATIC TRANSMISSION (DIAGNOSTICS)
No shift occurs from 3rd to 4th gear.
Engine brake is not effected when select lever is shifted from
4th gear to 3rd gear.
Engine brake is not effected when select lever is shifted from
3rd gear to 2nd gear.
Engine brake is not effected when select lever is shifted from
2nd gear to 1st gear.
Shift characteristics are erroneous.
No lock-up occurs.
Parking brake is not effected.
Shift lever cannot be moved or is hard to move from "P" range.
ATF spurts out.
Differential oil spurts out.
Differential oil level changes excessively.
Odor is produced from ATF supply pipe.
Shock occurs from 1st to 2nd gear.
Slippage occurs from 1st to 2nd gear.
Diagnostics with Phenomenon
Symptom
4AT(diag)-140
Problem parts
• TCM
• ATF temperature sensor
• Control valve
• 2-4 brake
• Inhibitor switch
• TCM
• Throttle position sensor
• Control valve
• Control valve
• Control valve
• Low & reverse brake
• Inhibitor switch
• TCM
• Front vehicle speed sensor
• Rear vehicle speed sensor
• Throttle position sensor
• Control valve
• Ground
• TCM
• Throttle position sensor
• ATF temperature sensor
• Control valve
• Lock-up facing
• Engine speed signal
• Select cable
• Select lever
• Parking mechanism
• ATF level too high.
• Differential gear oil level too high.
• Seal pipe
• Double oil seal
• High clutch
• 2-4 brake
• Low & reverse clutch
• Reverse clutch
• Lock-up facing
• ATF deterioration
• TCM
• Torque converter turbine speed sensor
• Accelerator pedal position sensor
• 2-4 brake duty solenoid
• ATF temperature sensor
• Line pressure linear solenoid
• Control valve
• 2-4 brake
• ATF deterioration
• Engine performance
• Low & reverse duty solenoid
• TCM
• Accelerator pedal position sensor
• 2-4 brake duty solenoid
• ATF temperature sensor
• Line pressure linear solenoid
• Control valve
• 2-4 brake