Subaru 2009 IMPREZA Service Manual page 2069

AUTOMATIC TRANSMISSION (DIAGNOSTICS)
15.Diagnostics with Phenomenon
A: INSPECTION
Starter does not operate when select lever is in "P" or "N" range.
Starter operates when select lever is in "R" or "D" range.
Abnormal noise when select lever is in "P" or "N".
Hissing noise occurs during standing start.
Noise occurs while driving in "D1".
Noise occurs while driving in "D2".
Noise occurs while driving in "D3".
Noise occurs while driving in "D4".
Vehicle moves when select lever is in "N" range.
Shock occurs when select lever is shifted from "N" to "D" range.
Excessive time lag occurs when select lever is shifted from "N" to
"D" range.
Shock occurs when select lever is shifted from "N" to "R" range.
Excessive time lag occurs when select lever is shifted from "N" to
"R" range.
Diagnostics with Phenomenon
Symptom
4AT(diag)-84
Problem parts
• Inhibitor switch
• Select cable
• AT select lever
• Starter motor and harness
• Strainer
• Transfer duty solenoid
• Oil pump
• Drive plate
• ATF level too high or too low
• Strainer
• ATF level too high or too low
• Final gear
• Planetary gear
• Reduction gear
• Differential gear oil level too high or too low
• Final gear
• Low & reverse brake
• Reduction gear
• Differential gear oil level too high or too low
• Final gear
• Low & reverse brake
• Planetary gear
• Reduction gear
• Differential gear oil level too high or too low
• Select cable
• Inhibitor switch
• TCM
• Low clutch
• Accelerator pedal position sensor
• ATF temperature sensor
• Line pressure linear solenoid
• Low clutch duty solenoid
• Low clutch
• TCM
• Harness
• Control valve
• ATF deterioration
• Control valve
• Low clutch
• Line pressure linear solenoid
• Seal ring
• Front gasket of transmission case
• Accelerator pedal position sensor
• ATF temperature sensor
• Line pressure linear solenoid
• TCM
• Harness
• Control valve
• ATF deterioration
• Control valve
• Low & reverse clutch
• Reverse clutch
• Line pressure linear solenoid
• Seal ring
• Front gasket of transmission case