Lock-up Control
WARNING: This page is about a different car, the 2008 Honda Pilot, 2007 Honda Pilot, and 2006 Honda Pilot. However, it is still accessible from the selected car via links, so may be relevant.
Torque converter clutch solenoid valve controls the hydraulic pressure to switch the lock-up shift valve and lock-up ON and OFF. The PCM actuates the torque converter clutch solenoid valve and the A/T clutch pressure control solenoid valve to start lock-up. A/T clutch pressure control solenoid valve C applies and regulates the hydraulic pressure to the lock-up control valve to control the amount of the lock-up.
The lock-up mechanism operates in the D position (2nd, 3rd, 4th, and 5th) and in the D3 position (2nd and 3rd).