Subaru 2006 Legacy, Manual

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4AT(diag)-101
Diagnostics with Phenomenon
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
15.Diagnostics with Phenomenon
A: INSPECTION
Symptom Problem parts
Starter does not operate when select lever is in “P” or “N”
range. Starter operates when select lever is in “R” or “D” range.
• Inhibitor switch
• Select cable
• Select lever
• Starter motor and harness
Abnormal noise when select lever is in “P” or “N”.
• Strainer
• Transfer duty solenoid
• Oil pump
• Drive plate
• ATF level too high or too low
Hissing noise occurs during standing start.
• Strainer
• ATF level too high or too low
Noise occurs while driving in “D1”. • Final gear
• Planetary gear
• Reduction gear
• Differential gear oil level too high or too low
Noise occurs while driving in “D2”.
Noise occurs while driving in “D3”.
• Final gear
• Low & reverse brake
• Reduction gear
• Differential gear oil level too high or too low
Noise occurs while driving in “D4”.
• Final gear
• Low & reverse brake
• Planetary gear
• Reduction gear
• Differential gear oil level too high or too low
Vehicle moves when select lever is in “N” range.
• Select cable
• Inhibitor switch
• TCM
• Low clutch
Shock occurs when select lever is shifted from “N” to “D” range.
• Accelerator pedal position sensor
• ATF temperature sensor
• Line pressure linear solenoid
• Low clutch duty solenoid
• Low clutch
• TCM
• Harness
• Control valve
• ATF deterioration
Excessive time lag occurs when select lever is shifted from “N”
to “D” range.
• Control valve
• Low clutch
• Line pressure linear solenoid
• Seal ring
• Front gasket of transmission case
Shock occurs when select lever is shifted from “N” to “R” range.
• Accelerator pedal position sensor
• ATF temperature sensor
• Line pressure linear solenoid
• TCM
• Harness
• Control valve
• ATF deterioration
Excessive time lag occurs when the select lever is shifted from
“N” to “R” range.
• Control valve
• Low & reverse clutch
• Reverse clutch
• Line pressure linear solenoid
• Seal ring
• Front gasket of transmission case
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