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What is TCC circuit malfunction?
A torque converter clutch (TCC) circuit malfunction is what triggers trouble code P0740. When disengaged, the TCC locks the converter shell to the turbine shaft – creating a 1 to 1 connection between the transmission and engine to prevent slippage.
How do I know if my clutch solenoid is bad?
3 Signs of Transmission Solenoid Problems
- Unpredictable Gear Shifts. One of the most common sign that one or more of your transmission solenoids are going bad is unpredictable gear shifts.
- Inability to Downshift.
- Delays In Shifting.
What causes torque converter failure?
Many torque converter failures can be caused by excessive friction, which means the torque converter’s needle bearings are damaged. Also, a faulty seals or faulty clutch solenoid can be to blame. A faulty seal can allow fluid to leak and become contaminated. A bad torque converter can damage a transmission.
What is a TCC PWM solenoid?
The torque converter clutch pulse width modulation (TCC PWM) solenoid valve controls the fluid acting on the converter clutch valve. The converter clutch valve controls the TCC application and release. The solenoid attaches to the control valve body within the transmission.
How to tell if TCC solenoid is bad?
Generally, if you unplug the TCC solenoid at the transmission and the symptoms go away, you have found the problem. Sometimes this can be misleading, because you don’t know for sure if the cause is a bad solenoid, dirt in the valve body, or a bad signal from the ECM.
What does the TCC solenoid do on a 4L60E?
Until engine temps reach a certain point, the TCC solenoid will not allow for lock up. In essence, the TCC solenoid is like a computer controlled on and off switch for your 4l60e’s torque converter lock up. The 4l60e TCC Solenoid is located on the front passenger side of the transmission near the valve body.
How does a TCC solenoid work on a Honda Accord?
When the TCC solenoid receives a signal from the engine control module (ECM), it opens a passage in the valve body and hydraulic fluid applies the TCC. When the ECM signal stops, the solenoid closes the valve and pressure is vented, causing the TCC to disengage.
What does a toque converter clutch solenoid do?
The main function of the toque converter clutch or TCC solenoid is to send pressurized fluid to the torque converter’s clutch allowing it to achieve lock up in 4th gear based on a signal from the engine control module (ECM).