16

Judder upon torque converter clutch (TCC) operation

DESCRIPTION

• Vehicle jolts when TCC is engaged.

POSSIBLE CAUSE

• Poor TCC engagement due to either slippage because the TCC piston is stuck or the line pressure is low.

  CAUTION:

  • If the TCC is stuck, inspect it. In addition, inspect the oil cooler for foreign particles which may have mixed in with the ATF.

• TCC slippage, burnt

• Line pressure low

• Incorrect accelerator pedal position signal

• Incorrect engine speed signal

• Incorrect engine coolant temperature signal

• Incorrect brake switch signal

• Incorrect engine torque signal

• VSS malfunction

• Turbine sensor malfunction

• Sensor ground malfunction

• TCC control solenoid malfunction

• Control valve body malfunction

• Torque converter malfunction