Lock-up Control
WARNING: This page is about a different car, the 2013 Honda Fit, 2012 Honda Fit, 2011 Honda Fit, 2010 Honda Fit, and 2009 Honda Fit. However, it is still accessible from the selected car via links, so may be relevant.
Shift solenoid valve D controls the hydraulic pressure to switch the lock-up shift valve ON and OFF. When the PCM turns shift solenoid valve D and A/T clutch pressure control solenoid valve A ON, lock-up starts. A/T clutch pressure control solenoid valve A regulates and applies hydraulic pressure to the lock-up control valve to control the degree of the lock-up.
The lock-up mechanism operates in all five gears in D, in 3rd gear in D3, and in 3rd and 4th gears in S.