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

TRANSMISSION 722.9 in MODEL 204.0 as of model year 2012 with CODE (B03) ECO start/stop function/YoM 11 mode refinement package

TRANSMISSION 722.9 in MODEL 204.2 as of model year 2012 with CODE (B03) ECO start/stop function/YoM 11 model refinement package

TRANSMISSION 722.9 in MODEL 204.3 with CODE (B03) ECO start/stop function

TRANSMISSION 722.9 in MODEL 204.9 with CODE (B03) ECO start/stop function

Implementation dates and validities for code (B03) ECO start/stop function

Model 204.0/2 (except model 204.049/249) as of model year 2012/YoM 11 model refinement package with engine 271.8, 276.9, 651.9
Model 204.025/225 as of 1.6.2011 with engine 642.8
Model 204.3
Model 204.9 as of 1.6.2011 with engine 651.9
Model 204.988 as of 1.1.2011 with engine 276.9

Shown: Electric transmission oil pump (M42)

Fig 1: Identifying Transmission Oil Auxiliary Pump Control Unit With Suction And Thrust Side

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 integrate transmission control (Y3/8n4)

Electric transmission oil pump, request

CAN output signals

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

Diagnostic data

	Wiring diagram for transmission oil auxiliary pump control unit	N89	PE27.19-P-2104-97FAA
	Wiring diagram for fully integrated transmission control unit	Y3/8	PE27.19-P-2103-97FAA