Subaru Legacy 2004 Service Manual page 2345

AUTOMATIC TRANSMISSION (DIAGNOSTICS)
Shock occurs when accelerator pedal is released at medium
speeds.
Vibration occurs during straight-forward operation.
Vibration occurs during turns. (tight corner braking phenome-
non)
Front wheel slippage occurs during standing starts.
Vehicle is not set in FWD mode.
Select lever is hard to move.
Select lever is excessively hard to move. (Unreasonable resis-
tance)
Select lever slips out of operation during acceleration or while
driving on rough terrain.
Manual mode is not engaged.
Gear does not change though the select lever is operated in
manual mode.
Diagnostics with Phenomenon
Symptom
4AT(diag)-142
Problem parts
• TCM
• Accelerator pedal position sensor
• ATF temperature sensor
• Line pressure linear solenoid
• Control valve
• Lock-up damper
• Engine performance
• TCM
• Lock-up duty solenoid
• Lock-up facing
• Lock-up damper
• TCM
• Front vehicle speed sensor
• Rear vehicle speed sensor
• Accelerator pedal position sensor
• ATF temperature sensor
• Transfer clutch
• Transfer valve
• Transfer duty solenoid
• ATF deterioration
• Harness
• TCM
• Front vehicle speed sensor
• Accelerator pedal position sensor
• ATF temperature sensor
• Control valve
• Transfer clutch
• Transfer valve
• Transfer pipe
• Transfer duty solenoid
• TCM
• Transfer clutch
• Transfer valve
• Transfer duty solenoid
• Select cable
• Select lever
• Detent spring
• Manual plate
• Detent spring
• Manual plate
• Select cable
• Select lever
• Detent spring
• Manual plate
• SPORT shift switch
• TCM
• Body integrated unit
• Up shift switch
• Down shift switch
• TCM
• Body integrated unit