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DTC P0741 TORQUE CONVERTER CLUTCH CIRCUIT PERFORMANCE OR STUCK OFF

DTC P0741 TORQUE CONVERTER CLUTCH CIRCUIT PERFORMANCE OR STUCK OFF

DIAGNOSIS:


• Lock up clutch malfunction

• Locking of valve


TROUBLE SYMPTOM:

Lock up is not operated.

WIRING DIAGRAM:

CHECK LOCK UP DUTY SOLENOID CIRCUIT.

Check according as DTC P0743 procedure.

Is there malfunction?

Yes

Repair or replace the lock up duty solenoid circuit.


No


CHECK INHIBITOR SWITCH CIRCUIT.

Check according as DTC P0705 procedure.

Is there malfunction?

Yes

Repair or replace the inhibitor switch circuit.


No


CHECK BRAKE LIGHT SWITCH CIRCUIT.

Check according as DTC P0719 and DTC P0724 procedure.

Is there malfunction?

Yes

Repair or replace the stop light switch circuit.


No


CHECK ATF TEMPERATURE SENSOR CIRCUIT.

Check according to DTC P0712 and DTC P0713 procedure.

Is there malfunction?

Yes

Repair or replace the ATF temperature circuit.


No


CHECK THROTTLE POSITION SENSOR.

Connect the Vehicle Diagnostic Interface to data link connector.

Turn the ignition switch to ON.

Read the value of accelerator pedal position sensor.

Does the value of accelerator pedal position sensor change from 0% to 100% smoothly when throttle position sensor was operated from fully closing to fully opening?

Yes


No

Check the throttle position sensor circuit.


CHECK TORQUE CONVERTER TURBINE SPEED SENSOR.

Move the select lever to “P” or “N” range.

Idle the engine.

Does the engine revolution displayed by Vehicle Diagnostic Interface almost correspond with engine revolution indicated by tachometer?

Yes


No

Check the torque converter turbine speed sensor circuit.


CHECK ENGINE SPEED SIGNAL.

Idle the engine.

Does the engine revolution displayed by Vehicle Diagnostic Interface almost correspond with engine revolution indicated by tachometer?

Yes

There is malfunction in TCM, TCM connector poor contact, or transmission assembly mechanical malfunction.


No

Check the engine speed signal circuit.