ME-SFI Ignition ON Function

ME-SFI ignition ON function

ENGINE 104.941 /943 /944 /991 /994as of 1.8.96
ENGINE 104.995
with CODE (494a) USA version
with CODE (807) Model year 1997
with CODE (808) Model year 1998
ENGINE 111.921 /942 as of 1.9.98,
111.943,
111.944 as of 1.8.96,
111.946 as of 1.6.98,
111.947 /973,
111.975 as of 1.8.96
ENGINE 111.945
in MODEL 208.335/435 as of 1.6.98,
202.020 /080 as of 1.9.98
ENGINE 111.974
with CODE (494a) USA version
with CODE (807) Model year 1997
with CODE (808) Model year 1998
ENGINE 112.910 /911 /912 /913 /914 /916 /917 /920 /921 /922 /923 /940 /941 /942 /943 /944 /946 /947 /949 /953 /954 /955 /970 /972 /973 /975
ENGINE 113.940 /941 /942 /943 /948 /960 /961 /963 /965 /966 /967 /968 /969
ENGINE 119.980 /981 /982 /985
ENGINE 120.982/ 983
ENGINE 137.970




Shown on Engine 119
40 Diaphragm pressure regulator
55 Fuel filter
75 Fuel tank
A1E26 "CHECK ENGINE" MIL
A1e43 EPC indicator lamp model 129, 140 up to 5/96
K27 Fuel pump relay Model 129, 140
K40 Relay module (model 210 up to 2/97, model 170)
K40/4 Fuse and relay modulet Model 210 as of 3/97
M3 Fuel pump (FP)
M16/1 Electronic accelerator (EA)/ cruise control (CC)/ idle speed control (ISC) actuator
N3/10 Motor electronics control unit
N16/1 Base module, model 129, 140
S2/1 Ignition/starter switch
A Terminal 30
CAN Data bus


Functions in the case of ignition ON:
- Supply the fuel injection and ignition system ME via the base module (N16/1), relay module (K40) or the fuse and relay module (K40/4, K40/7 or F1) with voltage.
- Actuating fuel pump for about 1 s (partially audible) as a full-running protection. An engine start must be completed, however, before repeated actuation of the fuel pump.
- Indicator lamps in the instrument cluster must light up (bulb check).
- At ignition ON data are transferred via the CAN databus (e.g. for drive authorization or Keyless Go)
- The throttle valve actuator checks each time its return spring after ignition ON and carries out a positioner adaptation in certain conditions.

Note: If the fuel pump does not run, first of all check the fuses at the base module (N16/1), relay module (K40) or at the fuse and relay module for the voltage supply of the ME control unit. Then check the fuse of the fuel pump.

Note: Model 170: In addition check crash relay (K56), if the indicator lamps in the instrument cluster do not light up when ignition is ON.