Component description for transmission oil auxiliary pump control unit - GF27.19-P-4030AHL

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TRANSMISSION 722.9 in MODEL 212 with CODE (B03) ECO start/stop function

Shown: Electric transmission oil pump (M42)

Fig 1: Transmission Oil Auxiliary Pump Control Unit

Courtesy of MERCEDES-BENZ USA

Location

The transmission oil auxiliary pump control unit is integrated into the electric transmission oil pump.

Task

General

The transmission oil auxiliary pump control unit controls the electric transmission oil pump. When the internal combustion engine has stopped the electric transmission oil pump takes over the oil supply of the control part and actuator part of the transmission.

CAN data bus

The transmission oil auxiliary pump control unit is connected to the fully integrated transmission control unit (Y3/8n4) via the drive train CAN (CAN) and exchanges data with it.

Input and output signals

The following input signals are evaluated by the transmission oil auxiliary pump control unit and the corresponding output signals are output:

Direct input signals
Direct output signals
CAN input signals
CAN output signals

Direct input signals

Terminal 87
Circuit 31

Direct output signals

None

CAN input signals

Control unit for fully integrated transmission control (Y3/8n4)

Electric transmission oil pump, request

CAN output signals

Control unit for fully integrated transmission control (Y3/8n4)

Diagnostic data

Wiring diagram for transmission oil auxiliary pump control unit

N89

PE27.19-P-2104-97DAA