Code p0740 troubleshooting 2001 honda civic ex (TCC Circuit)

DTC P0740 Torque Converter Clutch (TCC) Enable Solenoid Control Circuit

Circuit Description
The torque converter clutch (TCC) solenoid valve is an electrical device that is used with the torque converter clutch pulse width modulation (TCC PWM) solenoid valve in order to control TCC apply and release. The TCC solenoid valve attaches to the transmission case assembly extending into the pump cover. The TCC solenoid valve receives ignition voltage through the ignition 0 voltage circuit. The powertrain control module (PCM) controls the solenoid by providing the ground path on the TCC solenoid valve control circuit. The PCM monitors the throttle position sensor voltage, the vehicle speed, and other inputs in order to determine when to energize the TCC solenoid valve.
When the PCM detects a continuous open, short to ground or short to power in the TCC solenoid valve circuit, then DTC P0740 sets. DTC P0740 is a type B DTC.

Check it out on youtube.

This indicates a faulty Transmission Torque Converter Clutch (TCC) circuit (0740) or TCC solenoid (0743)

Trouble Code: P0740

A/T TCC Solenoid Circuit Malfunction

Possible Causes:


TCC solenoid control circuit open or shorted to groundTCC solenoid control circuit shorted to system power (B+)TCC solenoid is damaged or has failedPCM has failed

P0740 is torque convertor circuit malfunction,To access the solenoid you need to remove the air intake boot, The TCC is mounted at the top of the transmission, Remember you are dealing with a circuit malfunction this can be a bad wire connection or,a bad solenoid,

P0740 Torque Converter Clutch Circuit/Open
This means that the internal wiring for the Torque Converter Clutch or the clutch itself is burnt out or 'open.'

Good luck on this repair which will require a transmission tech to perform by opening up the transmission.

P0740 Trany converter clutch system failure
Since this is also a trany problem, test this code by getting a complete wiring diagram of the trany electronic circuit. Once you have it and identified the location and colors of the torque converter solenoids/module, it is a matter of measuring the resistance of the TCC solenoid and comparing it to all solenoids. If defective, it is will either show open or shorted connection. Don't forget the basics like checking the wires for integrity of insulation and routing (making sure the wires are not rubbing a metal or being burnt by the exhaust). If there is a chance that the solenoid needs to be replaced, drop the trany oil pan so you can verify for signs of debris.
TIP:
To manually test your TCC solenoid before replacing it, you can feed direct battery voltage on the supply side of the solenoid and you should hear it click. Also try to test the connections between the TCC module and the engine module.

P0740 Torque Converter Clutch Circuit Malfunction
The problem could be the torque converter itself or the sensor circuit for the clutch.
Best to have a Transmission Expert look at it to see if any further damage has occurred.

I sounds like the TCC solenoid has failed. The stalling problem confirms that the TCC is engaged.

P0740 is TCC circuit malfunction P0753 is shift solenoid A circuit electrical P0758 is shift solenoid B P1406 is EGR pintle position and P01860 is TCC circuit.

I am sorry to bum you guys out, but this usually means the piston in the torque converter is bad. The converter needs to be replaced along with a transmission flush.