Electric controller unit, component description - GF27.19-P-5145CWQ

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 in MODEL 204.0 up to Model Year 8

Fig 1: Locating Electric Controller Unit Components

Courtesy of MERCEDES-BENZ USA

Location

The fully integrated transmission control unit, the valve housing, the intermediate panel and the valve body are connected together with bolts and mounted under the transmission housing.

Task

The fully integrated transmission control controller unit receives the various input signals and converts the control unit information into hydraulic functions.

Fig 2: Identifying Electric Control Unit Components

Courtesy of MERCEDES-BENZ USA

Design

The fully integrated transmission control controller unit consists of a plastic supporting body in which the following electrical components are housed:

Turbine wheel RPM sensor
Internal transmission speed RPM sensor
Output shaft RPM sensor
Fully integrated transmission control unit with integrated transmission oil temperature sensor (Y3/8s2)
Selection range sensor
Working pressure control solenoid valve
Clutch control solenoid valve K1
Clutch control solenoid valve K2
Clutch control solenoid valve K3
Multidisk brake control solenoid valve B1
Multidisk brake control solenoid valve B2
Multidisk brake control solenoid valve B3
Torque converter lockup clutch control solenoid valve

The printed-conductor foil which is inserted in the supporting body makes the connection between the electrical components and the plug socket.

Apart from the solenoid valves all the other electrical components are permanently connected to the printed-conductor foil.

The connection to the cable set on the vehicle side is made with a bayonet lock via the plug socket.

Function

In the fully integrated transmission control controller unit, signals from the fully integrated transmission control unit are converted into hydraulic functions. The following components supply input signals to the fully integrated transmission control unit:

Turbine wheel RPM sensor
Internal transmission speed RPM sensor
Output shaft RPM sensor
Transmission oil temperature sensor, integrated in the fully integrated transmission control unit
Selection range sensor

The control solenoid valves listed are actuated by the fully integrated transmission control unit and trigger hydraulic functions:

Working pressure control solenoid valve
Multidisk brake control solenoid valve B1
Multidisk brake control solenoid valve B2
Multidisk brake control solenoid valve B3
Clutch control solenoid valve K1
Clutch control solenoid valve K2
Clutch control solenoid valve K3
Torque converter lockup clutch control solenoid valve