R Position: Reverse Inhibitor Control

If R is selected while the vehicle is moving forward at speeds over 6 mph (10 km/h), the PCM outputs a signal to turn ON the inhibitor solenoid, and the reverse inhibitor pressure (RI) in the right end of the reverse inhibitor valve is released. The reverse inhibitor valve is moved to the right side, and uncovers the stop reverse brake pressure (RVS) port leading to the reverse brake from the manual valve. The reverse brake pressure (RVS) is not applied to the reverse brake, and power is not transmitted to the reverse direction.

Fig 1: Hydraulic Pressure Flow Circuit Diagram (R Position - Reverse Inhibitor Control)

Courtesy of AMERICAN HONDA MOTOR CO., INC.