No Lock-Up

The PCM commands shift solenoid valve D to remain OFF, and covers the shift solenoid valve D pressure port (SD) to the lock-up shift valve. The lock-up shift valve is in the right side, and uncovers the torque converter pressure port (92) leading to the left side of the torque converter. Torque converter pressure (92) from the regulator valve becomes torque converter pressure (94) at the lock-up shift valve, and enters into the left side of the torque converter to disengage the torque converter clutch. The torque converter clutch is OFF.

Fig 1: Power Flow Diagram - No Lock-Up

Courtesy of AMERICAN HONDA MOTOR CO., INC.