ME-SFI transmission shift delay, function - GF07.61-P-4023MIS

ENGINE 272.9 in MODEL 221.0 /1 as of model year 2009/ AEJ 08 

ENGINE 273.9 in MODEL 216.3, 221.0 /1 as of model year 2009/ AEJ 08 

Function requirements for transmission shift delay, general points 

• Circuit 87M ON (engine control ON)
• Engine running
• Coolant temperature at start < 35°C
• Vehicle speed < 40 km/h

Transmission shift delay, general points 

Transmission shift delay brings the firewall catalytic converter more quickly up to operating temperature after engine start.

The ME-SFI [ME] control unit (N3/10) controls the transmission shift delay according to the following sensor and signal:

• Coolant temperature sensor (B11/4)
• ESP control unit (N47-5) or regenerative braking system control unit (N30/6) (for Hybrid), vehicle speed via the chassis CAN (CAN E)

Transmission shift delay function sequence 

Transmission shift delay is active for a maximum of 60 s and is entirely electronic.

Over the drive train CAN (CAN C), the ME-SFI [ME] control unit tells the electric controller unit (VGS) (Y3/8) to adjust the shift characteristics.

Partial load gear shifts (1-2-1, 2-3-2) thus take place at higher engine speeds or at higher vehicle speeds.

	Electrical function schematic for transmission shift delay	Model 216		PE07.61-P-2775-97CAB
	Component description for ME-SFI [ME] control unit	N3/10	Engine 273	GF07.61-P-6000MLS