General Information

Automatic Transaxle

P0741 Torque Converter Clutch Circuit Performance or Stuck Off - General Information

Component Location





General Description

The PCM/TCM controls the locking and unlocking of the Torque Converter Clutch (or Torque Converter Clutch), to the input shaft of the transmission, by applying hydraulic pressure. The main purpose of T/C clutch control is to save fuel by decreasing the hydraulic load inside the T/C. The PCM/TCM outputs current to control the Torque Converter Clutch Control Solenoid Valve (TCCSV) and hydraulic pressure is applied to the TCC according to the TCC current value. When the amount of current is high, high pressure is applied and the Torque Converter Clutch is locked. The normal operating range of the Torque Converter Clutch Control current value is from 200 mA (unlocked) to 1000 mA (locked).

DTC Description

TCM increases amount of current, which controls slipage between engine rpm and turbine rpm, in order to engage torque converter clutch.
TCM sets this DTC if Torque converter slippage is not reduced even though TCM controls Torque converter clutch solenoid valve with 1000 mA. - It is not the electrical problem but mechanical problem.
(MIL : Consecutive 2 driving cycle)

DTC Detecting Condition





Specification





Diagnostic Circuit Diagram





Signal Waveform & Data












Fig 1) Operation status of TCC SOL V/V in accordance with driving condition.
Fig 2) Slip status of TCC with 5th gear.
Fig 3) Direct connection status of TCC with 6th gear.