ME-SFI Warming-Up Control Function

Shown On Engine 119:

The transmission upshift delay is designed to more rapidly warm up the catalytic converter to its operating temperature after engine start.

In combination with automatic transmission type 722.6/7, transmission upshift delay is performed completely electronically. No additional components are required.

The engine control module requests the ETC control module (Y3/7n2) or the Sequentronic control module (N15/6) over the CAN databus to move the shift curves. The part load shifts (1-2, 2-3) are performed at a higher vehicle speed/engine speed.

The transmission upshift delay is active for up to 160 seconds if:
- Coolant temperature at start < 50 °C
- Vehicle speed < 53 km/h

ECM control module position/task/design/function
- Hot film mass air flow sensor and intake air temperature sensor integrated

AT control module position/task/function
- Transmission 722.6
- Speed signal

ABS control module position/task/design/function
- Speed signal

ETS control module position/task/design/function
- Speed signal

ASR control module position/task/design/function
- Speed signal

EPS control module position/task/design/function
- Speed signal