3239450 - E5030 PETROL ENGINE ELECTRONIC MANAGEMENT - Functional description (Mechanical gearbox)
Functional description
The engine control unit
M10
monitors
and controls the entire electronic ignition and injection system.
The direct supply for the control unit arrives
from the battery, from the line for the EFI maxifuse of
B5
up
to 2/99 or of
B99
from 2/99. at pin 4 of connector B of
M10
through
the line protected by the fuse
B35
up to 2/99 or fuse
F5
of the
additional fuse box
B98A
from 2/99.
The supply controlled by the ignition
(15/54) arrives from the line protected by fuse B25 up to 2/99 or
fuse F4 of the additional fuse box B98A from 2/99, and energizes
the main relay J10 which consequently sends the supply:
- to pin 2 of connector A of control unit M10 ;
- to injectors N70 ;
- to coils A30 ;
- to the timing sensor K47 ;
- to the air flow meter K41 , through the line protected
by fuse B40 up to 2/99 or fuse F3 of the additional
fuse box B98A from 2/99.;
- to the vapour recovery solenoid valve L10 , via
the line protected by fuse B40 up to 2/99 or F3 of B98A from
2/99.;
- to Lambda probe heater K40, via the line protected by
the fuse B40 up to 2/99 or F3 of B98A from 2/99.
The ignition-operated power supply (INT/A)
also supplies fuel pump
J15
, which is excited by a control
signal (earth) from pin 29 of connector C of control unit
M10
.
This supplies power to the fuel pump
N40
,
which is earthed through the inertia switch
I50
, which cuts
off the circuit in the case of impact to prevent the danger of fuel
flowing out.
Pins 3, 7 and 8 of connector A of control
unit
M10
are earthed and used as references: the first two
for the ignition and the third for the injectors.
Pin 8 of connector F is also earthed.
The engine control unit
M10
receives
signals from the various sensors in order to monitor all engine
operating parameters.
Rpm sensor
K46
supplies information
on engine speed via a frequency signal sent to pins 37 and 38 of
connector E of control unit
M10
.
Timing sensor
K47
receives a reference
earth from pin 39 of connector E of control unit
M10
and
sends back a frequency signal corresponding to the timing at pin
40 of the same connector up to 2/99.
The engine temperature sensor
K45
receives
a reference earth from pin 28 of connector E of the control unit
M10
and
provides a signal proportional to the temperature of the engine
coolant at pin 29 of the same connector from 2/99.
Engine temperature sender unit
K36
receives
a reference earth from connector E of control unit
M10
and
supplies a signal proportional to the coolant temperature to pin
29 of control unit connector E. The same sender unit also supplies information
to the temperature gauge and warning light (
See E4023 DASHBOARD CENTRE AUXILIARY EQUIPMENT()
).
Hot Lambda probe
K40
provides control
unit
M10
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