P0741

DTC P0741









Circuit Description with 4T65-E Automatic Transaxle
The PCM controls the torque converter clutch (TCC) solenoid valve pulse width modulation (PWM). The solenoid controls the hydraulic fluid for TCC apply and release. When the TCC is applied, the engine is coupled directly to the transmission through the TCC. The TCC slip speed should be near 0.
If the PCM detects high torque converter slip when the TCC is commanded ON, then DTC P0741 sets. DTC P0741 is a type B DTC.

Conditions for Running the DTC
^ No TIP DTCs P0121, P0122 or P0123.
^ No VSS DTCs P0502 or P0503.
^ No AT ISS DTCs P0716 or P0717.
^ No TCC Stuck ON DTC P0742.
^ No IMS DTCs P1820, P1822, P1823 or P1825.
^ No TCC PWM solenoid valve DTC P1860.
^ The engine run time is greater than 5 seconds.
^ The time since the gear select lever change is greater than 6 seconds.
^ The IMS indicates D2, D3 or D4.
^ The transmission gear ratio indicates 2nd, 3rd or 4th gear.
^ The transmission fluid temperature is 20 - 133°C (68 - 271°F).
^ The TP angle is 10-50 percent.
^ The engine torque is 43 - 215 Nm (32 - 159 ft. lbs.).
^ The TCC solenoid valve is commanded ON.

Conditions for Setting the DTC
TCC slip speed exceeds its limit for a given torque for 5 seconds.

Action Taken When the DTC Sets
^ The PCM illuminates the malfunction indicator lamp (MIL) during the second consecutive trip in which the Conditions for Setting the DTC are met.
^ The PCM inhibits 4th gear if the transmission is in hot mode.
^ The PCM records the operating conditions when the Conditions for Setting the DTC are met. The PCM stores this information as Freeze Frame and Failure Records.
^ The PCM stores DTC P0741 in PCM history during the second consecutive trip in which the Conditions for Setting the DTC are met.

Conditions for Clearing the MIL/DTC
^ The PCM turns OFF the MIL during the third consecutive trip in which the diagnostic test runs and passes.
^ A scan tool can clear the MIL/DTC
^ The PCM clears the DTC from PCM history if the vehicle completes 40 warm-up cycles without an emission-related diagnostic fault occurring.
^ The PCM cancels the DTC default actions when the ignition switch is OFF long enough in order to power down the PCM

Diagnostic Aids
^ Inspect the transmission fluid level.
^ The transmission may be in hot mode. Inspect the transmission fluid lines to the radiator. The lines may be pinched, plugged or twisted.

Test Description
The numbers below refer to the step numbers on the diagnostic table.
2. This step inspects the transmission fluid to ensure that it is at the proper level.
3. This step verifies that the TCC engages when commanded ON by the scan tool.