LEMON Manuals: Even more car manuals for everyone
Home >> Subaru >> 2022 >> BRZ Limited, Automatic Trans >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Automatic Transmission System >> Symptoms and causes >> Inspection

Symptoms and causes: Inspection

CAUTION: Check the control operation history. Ref. to ENGINE (DIAGNOSTICS) (H4DO)>WORK SUPPORT>OPERATION .
Symptoms Faulty parts
No up-shift. (1st → 2nd)  
  • Transmission harness
  • Shift solenoid A (S1)
  • TCM
No up-shift. (2nd → 3rd)
  • Transmission harness
  • Shift solenoid B (S2)
  • TCM
No up-shift. (3rd → 4th)
  • Transmission harness
  • Engine coolant temperature system
  • Shift solenoid C (S3)
  • TCM
No up-shift. (4th → 5th)
  • Transmission harness
  • Engine coolant temperature system
  • Pressure solenoid A (SL1)
  • Pressure solenoid B (SL2)
  • Shift solenoid D (S4)
  • Shift solenoid E (SR)
  • TCM
No up-shift. (5th → 6th)
  • Inhibitor switch system
  • Transmission harness
  • Engine coolant temperature system
  • Shift solenoid B (S2)
  • TCM
No down-shift. (6th → 5th)
  • Inhibitor switch system
  • Shift solenoid B (S2)
  • TCM
No down-shift. (5th → 4th)
  • Pressure solenoid A (SL1)
  • Pressure solenoid B (SL2)
  • Shift solenoid D (S4)
  • Shift solenoid E (SR)
  • TCM
No down-shift. (4th → 3rd)
  • Shift solenoid C (S3)
  • TCM
No down-shift. (3rd → 2nd)
  • Shift solenoid B (S2)
  • TCM
No down-shift. (2nd → 1st)
  • Shift solenoid A (S1)
  • TCM
Does not turn lock-up ON or OFF.
  • Stop light switch system
  • Engine coolant temperature system
  • Transmission harness
  • Turbine speed sensor system
  • Torque converter clutch pressure solenoid (SLU)
  • TCM
Shift point is faulty.
  • Select mode switch system
  • Inhibitor switch system
  • Stop light switch system
  • Engine coolant temperature system
  • Throttle position sensor system
  • Transmission harness
  • Turbine speed sensor system
  • Output revolution sensor system
  • Pressure solenoid D (SLT)
  • ATF temperature sensor system
  • TCM
Does not change the range with shifts at manual mode.
  • Manual mode switch system
  • Inhibitor switch system
  • TCM
Does not change the range with the paddle shift switch.
  • Paddle shift switch system
  • TCM
Shift indicator does not illuminate.
  • Paddle shift switch system
  • Combination meter system
  • TCM
Shifts up to 6th when the engine is cold.
  • Engine coolant temperature system
  • TCM
Excessive shift shock (N → D)
  • Transmission harness
  • Pressure solenoid D (SLT)
  • TCM
Excessive shift shock (when any gear is shifted).
  • Throttle position sensor system
  • Transmission harness
  • Turbine speed sensor system
  • Pressure solenoid A (SL1)
  • Pressure solenoid B (SL2)
  • Pressure solenoid D (SLT)
  • Torque converter clutch pressure solenoid (SLU)
  • TCM
Excessive shift shock at lock-up
  • Transmission harness
  • Turbine speed sensor system
  • Output revolution sensor system
  • Torque converter clutch pressure solenoid (SLU)
  • TCM
Poor acceleration
  • Select mode switch system
  • Transmission harness
  • Pressure solenoid D (SLT)
  • TCM
Shifting requires a long period of time at shift-up.
  • Transmission harness
  • Pressure solenoid D (SLT)
  • Shift solenoid E (SR)
  • TCM
Shifting requires a long period of time at shift-down.
  • Transmission harness
  • Pressure solenoid D (SLT)
  • Shift solenoid E (SR)
  • TCM
Does not switch to the SNOW mode.
  • Select mode switch system
  • Transmission harness
  • Pressure solenoid D (SLT)
  • TCM
Does not switch to the SPORT mode.
  • Select mode switch system
  • Transmission harness
  • Pressure solenoid D (SLT)
  • TCM
AT slippage during 5th ←→ 6th shifting.
  • Pressure solenoid D (SLT)
  • Shift solenoid E (SR)
  • TCM
Shift lock is not released.
  • IG circuit system
  • Body integrated unit system
  • Shift lock system
  • Shift lock solenoid system
  • P range switch system
  • Stop light switch system
  • Vehicle harness and connector
  • Instrument panel junction block system
  • Transmission harness
EyeSight does not operate. Ref. to TRANSMISSION (DIAGNOSTICS)>DIAGNOSTICS WITH PHENOMENON>INSPECTION .
scientia non olet · About LEMON Manuals