Pressure sensor Lock-up
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2006 Volvo S80, 2005 Volvo S80, 2004 Volvo S80, 2003 Volvo S80, and 2002 Volvo S80. However, it is still accessible from the selected car via links, so may be relevant.
The lock-up pressure sensor is positioned in the valve housing, which is mounted behind the side cover for the transmission. The lock-up pressure sensor consists of six electrical pressure switches. The pressure switches indicate the hydraulic pressure in the different transmission systems. The pressure sensor provides the transmission control module (TCM) with information about the system pressure and selected gear. The transmission control module (TCM) uses this information to control the lock-up solenoid, SL.
There are diagnostics for the lock-up pressure sensor.