Torque Converter Clutch Solenoid Valve

The torque converter clutch solenoid valve is installed to control valve assembly.

Fig 1: Identifying Torque Converter Clutch Solenoid Valve
Courtesy of NISSAN NORTH AMERICA, INC.
The torque converter clutch solenoid valve is activated, with the gear in D₂ , D₃ , D₄ , D₅ , D₆ , D₇ , M2, M3, M4, M5, M6 and M7 by the TCM in response to signals transmitted from the output speed sensor and accelerator pedal position sensor. Torque converter clutch piston operation will then be controlled.
The torque converter clutch solenoid valve utilizes a linear solenoid valve [N/L (normal low) type].

Fig 2: Current Versus Oil Pressure Graph
Courtesy of NISSAN NORTH AMERICA, INC.
NOTE:
- The principle of the linear solenoid valve utilizes the fact that the force pressing on the valve spool installed inside the coil increases nearly in proportion to the current. This allows it to produce a fluid pressure that is proportional to this pressing force.
- The N/L (normal low) type does not produce hydraulic control when the coil is not energized.