Lock-up Control
WARNING: This page is about a different car, the 2011 Acura TL, 2010 Acura TL, and 2009 Acura TL. 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 and lock-up ON and OFF When the PCM actuates shift solenoid valve D and A/T clutch pressure control solenoid valve C ON, lock-upstarts A/T clutch pressure control solenoid valve C applies and regulates hydraulic pressure to the lock-up control valve to control the amount of lock-up
The lock-up mechanism operates in D (2nd, 3rd, 4th, and 5th gears) and S with sequential sportshift or automatic shift models (2nd, 3rd, and 4th gears)