Subaru IMPREZA GD 2007 Series Manual page 2729

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AUTOMATIC TRANSMISSION (DIAGNOSTICS)
Symptom
Excessive time lag occurs when the select lever is moved from
"N" to "R" range.
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 only when in the "D", "3" range.
(Engine operates)
Vehicle does not start in only in the "D", "3" or "2" range.
(Engine operates)
Vehicle does not start in only in the "D", "3" or "2" 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 the "D", "3" or "2"
range. (Normal rpm stall)
Acceleration is poor when select lever is in "R" range.
(Normal rpm stall)
General Diagnostic Table
• Control valve
• Low & reverse clutch
• Reverse clutch
• Line pressure linear solenoid
• Seal ring
• Front gasket of transmission case
• 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 is 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
• Low clutch
• Reverse clutch
• Control valve
• Control valve
• Low clutch
• Reverse clutch
• ATF level is 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
4AT(D)(diag)-90
Problem parts