Control valve pressure, function - GF27.60-P-3017AHW

WARNING: This page is about a different car, the 2011 Mercedes-Benz C300, 2010 Mercedes-Benz C300, 2009 Mercedes-Benz C300, and 2008 Mercedes-Benz C300. However, it is still accessible from the selected car via links, so may be relevant.

TRANSMISSION 722.9 (except 722.930) in MODEL 204.0 as of model year 2009/YoM 08

Function requirements for control valve pressure, general

Circuit 87 (connected circuit 15) ON
Circuit 61 (engine running)

Control valve pressure, general

The control valve supply pressure is drawn from the working pressure and is limited to a maximum pressure of 8 bar.

2 supply pressure regulating valves are used.

Supply pressure regulating valve 1
Supply pressure regulating valve 2

Supply pressure regulating valve 1

Supply pressure regulating valve 1 supplies the following control solenoid valves:

Working pressure control solenoid valve (Y3/8y1)
Clutch control solenoid valve K2 (Y3/8y3)
Multidisk brake control solenoid valve B2 (Y3/8y6)
Torque converter lockup clutch control solenoid valve (Y3/8y8)

Supply pressure regulating valve 2

Supply pressure regulating valve 2 supplies the following control solenoid valves:

Clutch control solenoid valve K1 (Y3/8y2)
Clutch control solenoid valve K3 (Y3/8y4)
Multidisk brake control solenoid valve B1 (Y3/8y5)
Multidisk brake control solenoid valve B3 (Y3/8y7)

By using two supply pressure regulating valves, the control solenoid valve groups are isolated from each other and the control solenoid valve groups do not influence each other during any shift operation.