Full Lock-up

When the vehicle speed increases, the PCM actuates A/T clutch pressure control solenoid valve C to increase A/T clutch pressure control solenoid valve C pressure (58). A/T clutch pressure control solenoid valve C pressure (58) is applied to the lock-up control valve and lock-up timing valve, and the lock-up control valve and lock-up timing valve are moved to the left side. Torque converter pressure (94) from the left side of the torque converter releases at the lock-up control valve, and lock-up timing valve uncovers torque converter pressure port (91) leading to the right side of the torque converter. Torque converter back pressure is released fully, and torque converter clutch is engaged fully.

Fig 1: Identifying Hydraulic Control Diagram (Full Lock-Up)

Courtesy of AMERICAN HONDA MOTOR CO., INC.

Fig 2: Identifying A/T Gear Position Indicator Driver - Circuit Diagram (1 Of 2)

Courtesy of AMERICAN HONDA MOTOR CO., INC.

Fig 3: Identifying A/T Gear Position Indicator Driver - Circuit Diagram (2 Of 2)

Courtesy of AMERICAN HONDA MOTOR CO., INC.