GF07.61-P-3012F ME-SFI fuel pump actuation function 10.7.96

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


Shown on Engine 119
55 Fuel filter 75 Fuel tank
K27 Fuel pump relay module
Model 129, 140, 202, 208
Model 210 as of 3/97

K40 Relay module model 170,
model 210 up to 2/97

K40/4 Fuse and relay module
Model 202
Model 210 as of 3/97

Model 163 designation F1
L5 Crankshaft position sensor
M3 Fuel pump (FP)
N3/10 ME-SFI control unit
N16/1 Base module
S2/1 Ignition/starter switch
Y62 Injectors (LH-SFI, HFM-SFI, PEC
[LH, HFM, PMS])
 
    P07.61-0377-06

Task
Actuating fuel pump at
Ignition ON: Actuate fuel pump for about 1 s (audible) as a full running protection. An engine start must be completed, however, before repeated actuation of the fuel pump.
when starting engine via the first signals of the crankshaft position sensor (L5/5 on Engine 120)
When engine running by means of TN engine speed signal.

Design/function
The fuel is actuated through the fuel pump relay.
The fuel pump relay is actuated through a ground signal from the ME control unit. When the contact is closed, the fuel pump (M3) is linked through circuit 87 to circuit 30 (B+). The voltage supply is fused to the fuel pump.
 
On engine 120, the fuel pump is actuated by the right ME-SFI control unit (N3/12).


If the fuel pump does not run, check the voltage supply of the ME control unit and the fuse of the fuel pump.
Check electric connection at fuel pump for corrosion.

  Fuel pump location/task/design/function   GF47.20-P-4003L
  Engine speed signal function   GF07.61-P-3017F
  Crankshaft position sensor, location/task/design/function   GF07.04-P-4116F
  Fuel pump relay, location/task/design/function   GF54.15-P-4105L
  Motor electronics control unit, location/task/design/function   GF07.61-P-5000F
  Voltage supply of ME-SFI control unit function   GF07.61-P-5001F
  Electronic ignition switch control unit, location/task/design/function   GF80.57-P-4102S
Ignition/starter switch (S2/1) Circuitry of circuit 50 refer to wiring diagrams group 15, 54