Subaru LEGACY 2006 Manual page 3627

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Symptoms
Gear does not shift 4th of "D" range → 5th of "D" range or
"4th of manual mode" → "5th of manual mode".
Gear does not shift down to 4th on "D" range or manual
mode.
Gear does not shift down to 3rd on "D" range or manual
mode.
Gear does not shift down to 2nd on "D" range or manual
mode.
Gear does not shift down to 1st on "D" range or manual
mode.
No lock-up occurs.
No shift shock occurred when shifting 1st of "D" range →
2nd of "D" range or "1st of manual mode" → "2nd of man-
ual mode". Or clutch slipping occurred.
General Diagnostic Table
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
• Fluid level and condition
• Vehicle speed sensor 1 and vehicle speed sensor 2
• Oil pressure switch 1 and front brake solenoid valve
• Oil pressure switch 4 and direct clutch solenoid valve
• Turbine speed sensor 1 and turbine speed sensor 2
• ATF temperature sensor
• Line pressure
• Up switch signal
• CAN communication signal
• Accelerator pedal position sensor
• Fluid level and condition
• Vehicle speed sensor 1 and vehicle speed sensor 2
• Oil pressure switch 1 and front brake solenoid valve
• Oil pressure switch 4 and direct clutch solenoid valve
• Line pressure
• Down switch signal
• CAN communication signal
• Accelerator pedal position sensor
• Fluid level and condition
• Vehicle speed sensor 1 and vehicle speed sensor 2
• Oil pressure switch 3 and input clutch solenoid valve
• Oil pressure switch 1 and front brake solenoid valve
• Line pressure
• Down switch signal
• CAN communication signal
• Accelerator pedal position sensor
• TCM power supply
• PVIGN relay
• Fluid level and condition
• Vehicle speed sensor 1 and vehicle speed sensor 2
• Oil pressure switch 5 and high & low reverse clutch solenoid
• Line pressure
• Down switch signal
• CAN communication signal
• Accelerator pedal position sensor
• Fluid level and condition
• Vehicle speed sensor 1 and vehicle speed sensor 2
• Oil pressure switch 4 and direct clutch solenoid valve
• Line pressure
• Down switch signal
• CAN communication signal
• Accelerator pedal position sensor
• Fluid level and condition
• Line pressure
• Engine speed signal
• Turbine speed sensor 1 and turbine speed sensor 2
• Lock up solenoid valve
• CAN communication signal
• ATF temperature sensor 1 and 2
• Accelerator pedal position sensor
• Brake switch signal
• Range signal
• Fluid level and condition
• Vehicle speed sensor 1 and vehicle speed sensor 2
• Oil pressure switch 4 and direct clutch solenoid valve
• Line pressure
• CAN communication signal
5AT(diag)-137
Problem parts