ENGINE   113.940 /941 /942 /943 /948 /960 /961 /963 /965 /966 /967 /968 /969 ENGINE   137.970

		P07.61-2444-06

ME-SFI control unit voltage supply Model Series 129, 140, 170, 202, 208, 210 F1 Fuse and relay module (MODEL 163) K40 Relay module (model 170, model 210 up to 2/97) K40/4 Fuse and relay module (model 202, 208, 230 , model 210 as of 3/97) K40/7 Fuse and relay module (model 215, 220)

N3/10 ME-SFI control unit N10/1 Front SAM control unit with fuse and relay module, Model 203, 209 N16/1 Base module, model 129, 140 W Ground (depending on version as well as LHD or RHD several ground lines e.g. for ignition output stages or electronics)

Model 210 as of 3/97 K40/4 Fuse and relay module N3/10 ME-SFI control unit X11/4 Data link connector, 38-pin
		P07.61-0574-01

MODEL 163 F1 Fuse and relay module K3 Fuel pump relay module K8 Starter relay K12 Circuit 15 relay K28 AIR relay module N3/10 ME-SFI [ME] control unit
		P07.61-0568-04

MODEL 215, 220 K40/7kK Motor electronics and chassis relay (plug position K) K40/7kL Starter relay (plug position L) K40/7kN Air injection relay (plug position N) N3/10 ME-SFI control unit
		P07.61-2043-01

Model 211 N3/10 ME-SFI [ME] control unit N10/1IC Cricuit 87 engine relay (driver-side SAM control unit with fuse and relay module) N10/1kL Starter relay N10/1kR AIR pump relay
		P07.61-2626-01

MODEL 203, 209 N3/10 ME-SFI control unit N10/1kO Front SAM control unit with fuse and relay module, air injection relay N10/1kR Front SAM control unit with fuse and relay module, terminal 87 engine relay N10/1KS Front SAM control unit with fuse and relay module, starter relay
		P07.61-2483-01

MODEL 203, 209 Arrangements at front SAM control unit with fuse and relay module 48 Circuit 15 fuse, ignition coils 52 Starter fuse 53 Engine 1 circuit 87 fuse 54 Circuit 87 engine 2 fuse 65 AIR pump fuse O AIR pump relay R Circuit 87 relay, engine S Starter relay
		P07.61-2526-05

Model 230 F33 Rear prefuse (Fuses 200 A and 60 A screwed on the reverse side) N3/10 ME-SFI [ME] control unit K40/4 Passenger-side fuse and relay module K40/4f43 Fuse 43 (circuit 87 engine 1, connector sleeve Z7/35) K40/4f44 Fuse 44 (circuit 87 engine 2, connector sleeve Z7/36) K40/4kK Motor electronics and chassis relay (plug position K) K40/4kL Starter relay (plug position L) K40/4kM Circuit 30z relay (plug position M) K40/4kO K40/4kN, plug position N
		P07.61-2880-06

Voltage supply The ME-SFI control unit is supplied with voltage at circuits 87 and 30 as follows (fused/unfused): Model 129, 140 by the base module Model 170, Model 210 up to 2/97 by the relay module Model 202, 208, Model 210 as of 3/97 by the fuse and relay module MODEL 163 by the fuse and relay moduleF1 Model 215, 220 by the right fuse and relay module (K40/7) Model 203, 209, 211 from SAM control unit with fuse and relay module (N10/1) Model 230 Right fuse and relay module (K40/4)

Groundconnections of output stages Several ground connections of the ignition output stages and the ground of the electronics are attached close to the ME control unit (major assemblies compartment partition, wheelhouse or body). The ME control unit features a short-circuit protection as well as a reversed polarity protection in the operating voltage range. In certain cases voltage is supplied through several pins connected in parallel by means of bridges to relief the electrical connectors.

Function on vehicles with electronic ignition switch control unit If the signal "Circuit 15 fused On" transmitted by the EIS control unit (N73) is read in by the ME control unit (N3/10), the ground for the engine main relay is switched through by actuating a transistor. Once the engine main relay has closed the power contact, voltage flows through it from circuit 30 downstream of the corresponding fuses as circuit 87 M to the ME control unit. Here the engine control is switched on through circuit 87 M. On model 203, 209, 211, 230 the output stage takes over the further actuation of the engine main relay.

If the ME control unit receives the signal "circuit 15 fused off" from the EIS control unit, the delayed-off running of the processor is started. Once the delayed-off running is ended, the engine main relay is switched off and the ME control unit is thus isolated from the electrical system. Voltage supply refer to Wiring Diagrams, Group 54.