Symptoms - Automatic Transmission

On-Vehicle Repair Matrix

Symptom	Possible Cause
Increasing Engine Speed in Drive, Low or Reverse but No Vehicle Start	Engine System Incorrect ATF Level Adjustment Improper Line Pressure Value Shift Control Cable TCM Transmission Range (TR) Switch Primary Speed Sensor Secondary Speed Sensor Secondary Pressure Sensor Line Pressure Solenoid Valve High Clutch and Reverse Brake Solenoid Valve Low Brake Solenoid Valve CVT Fluid Temperature Sensor Control Valve Body Oil Pump Pulley, Steel Belt Low Brake Reverse Brake Counter Gear Planetary Gear Reduction Gear Final Gear, Differential Gear
Engine Stall in Drive, Low or Reverse and No Vehicle Start	Shift Control Cable TCM Transmission Range (TR) Switch Primary Speed Sensor Secondary Speed Sensor Secondary Pressure Sensor Primary Pressure Solenoid Valve Line Pressure Solenoid Valve High Clutch and Reverse Brake Solenoid Valve Low Brake Solenoid Valve CVT Fluid Temperature Sensor Control Valve Body Bearings Counter Gear Planetary Gear Reduction Gear Final Gear, Differential Gear Parking Mechanism
Insufficient Acceleration at Start in Drive, Low or Reverse during Driving	Engine System Improper Line Pressure Value TCM Transmission Range (TR) Switch Primary Speed Sensor Secondary Speed Sensor Output Speed Sensor Secondary Pressure Sensor Primary Pressure Solenoid Valve Line Pressure Solenoid Valve Torque Converter Clutch Solenoid Valve High Clutch and Reverse Brake Solenoid Valve Low Brake Solenoid Valve CVT Fluid Temperature Sensor Control Valve Body Torque Converter Low Brake Reverse Brake
Suddenly Increasing Engine Speed in Drive, Low or Reverse during Driving	Incorrect ATF Level Adjustment Improper Line Pressure Value Secondary Pressure Sensor Primary Pressure Solenoid Valve Line Pressure Solenoid Valve High Clutch and Reverse Brake Solenoid Valve Low Brake Solenoid Valve Control Valve Body Oil Pump Pulley, Steel Belt Low Brake High Clutch Reverse Brake
Suddenly Applied Engine Brake in Drive or Reverse during Driving	Engine System Improper Line Pressure Value Primary Pressure Solenoid Valve Line Pressure Solenoid Valve High Clutch and Reverse Brake Solenoid Valve Low Brake Solenoid Valve Control Valve Body Low Brake High Clutch Reverse Brake
Engine Racing from 1st to 2nd Gear or 2nd to 1st Gear	Engine System Improper Line Pressure Value Line Pressure Solenoid Valve High Clutch and Reverse Brake Solenoid Valve Low Brake Solenoid Valve Control Valve Body Oil Pump Pulley, Steel Belt Low Brake High Clutch
Ineffective Engine Braking in Low	Improper Line Pressure Valve Shift Control Cable TCM Transmission Range (TR) Switch Primary Speed Sensor Secondary Speed Sensor Primary Pressure Solenoid Valve Line Pressure Solenoid Valve Torque Converter Clutch Solenoid Valve Low Brake Solenoid Valve Control Valve Body Oil Pump Torque Converter Pulley, Steel Belt Low Brake High Clutch
Immediate Engine Stall before Stop at Deceleration in Drive or Low	Output Speed Sensor Torque Converter Clutch Solenoid Valve Control Valve Body Torque Converter
Slippage in Lock Up or Impossible Lock Up during Driving in Drive	TCM Transmission Range (TR) Switch Primary Speed Sensor Secondary Speed Sensor Output Speed Sensor Secondary Pressure Sensor Primary Pressure Solenoid Valve Line Pressure Solenoid Valve Torque Converter Clutch Solenoid Valve CVT Fluid Temperature Sensor Control Valve Body Torque Converter
Large Shock at Start in Drive, Low or Reverse	Improper Line Pressure Valve Secondary Pressure Sensor Line Pressure Solenoid Valve Torque Converter Clutch Solenoid Valve Control Valve Body Pulley, Steel Belt Low Brake Reverse Brake Counter Gear Planetary Gear Reduction Gear Final Gear, Differential Gear
Large Shock from 1st to 2nd Gear	Engine System Improper Line Pressure Value TCM Primary Pressure Solenoid Valve Line Pressure Solenoid Valve High Clutch and Reverse Brake Solenoid Valve Low Brake Solenoid Valve Control Valve Body Low Brake High Clutch
Large Shock in Lock Up during Driving in Drive or Low	TCM Torque Converter Clutch Solenoid Valve Control Valve Body Torque Converter
Large Shock when the Selector Lever Is Shifted from Neutral to Drive and from Neutral to Reverse	Engine System Improper Line Pressure Value TCM Transmission Range (TR) Switch Primary Speed Sensor Secondary Speed Sensor Line Pressure Solenoid Valve Torque Converter Clutch Solenoid Valve High Clutch and Reverse Brake Solenoid Valve Low Brake Solenoid Valve CVT Fluid Temperature Sensor Control Valve Body Low Brake Reverse Brake
Vibration in Drive, Low or Reverse during Driving	Engine System Incorrect ATF Level Adjustment Improper Line Pressure Value TCM Output Speed Sensor Secondary Pressure Sensor Torque Converter Clutch Solenoid Valve High Clutch and Reverse Brake Solenoid Valve Low Brake Solenoid Valve Control Valve Body Oil Pump Torque Converter Pulley, Steel Belt Low Brake High Clutch Reverse Brake Bearings Counter Gear Planetary Gear Reduction Gear Final Gear, Differential Gear
Noise during Driving	Incorrect ATF Level Adjustment Control Valve Body Oil Pump Pulley, Steel Belt Bearings Counter Gear Planetary Gear Reduction Gear Final Gear, Differential Gear
Noise in Idling	Engine System Incorrect ATF Level Adjustment Control Valve Body Oil Pump Pulley, Steel Belt Bearings Counter Gear Planetary Gear
Large Shock at Start when Start/Stop System is Activated (only for Start/Stop vehicle)	Engine System Improper Line Pressure Value TCM Output Speed Sensor Line Pressure Solenoid Valve Torque Converter Clutch Solenoid Valve High Clutch and Reverse Brake Solenoid Valve Low Brake Solenoid Valve Control Valve Body Electric Oil Pump Low Brake Reverse Brake
Operative Starter in Drive, Low or Reverse	Shift Control Cable TCM Transmission Range (TR) Switch
Inoperative Starter in Park or Neutral	Shift Control Cable TCM Transmission Range (TR) Switch
Engine Stall in Drive, Low or Reverse during Stop	Engine System TCM Output Speed Sensor Torque Converter Clutch Solenoid Valve Control Valve Body Torque Converter
Engine Stall in Park or Neutral during Stop	Engine System TCM Output Speed Sensor Torque Converter Clutch Solenoid Valve
Inoperative Parking Lock in Park	Shift Control Cable Transmission Range (TR) Switch Parking Mechanism
No Cancelled Parking Lock when Selector Lever Is Shifted from Park to Other	Shift Control Cable Transmission Range (TR) Switch Parking Mechanism