3239455 - E5030 PETROL ENGINE ELECTRONIC MANAGEMENT - Functional description (Q-System)
Functional description
The engine control unit
M10
monitors
and controls the entire electronic ignition and injection system.
The control unit is supplied directly by
the battery via a line protected by maxifuse EFI located on the
battery (connector
B99 C
), at pin 4 of connector B of
M10
via
the line protected by fuse
F5
of the additional fuse box
B98
A
.
The ignition-operated power supply
(15/54) is received on a line protected by the fuse F4 of the additional
fuse box B98 A, 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 the coils A30 ;
- to the timing sensor K47 ;
- to the air flow meter K41 , via the line protected
by the fuse F3 of the additional fuse box B98 A .
- to the vapour recovery solenoid L10 , again via
the line protected by fuse F3 ;
- to the heater of the Lambda probes K39 and K40 ,
again via the line protected by fuse F3 .
The earth of the main relay
J10
is
protected by a jumper diode
M11
.
The ignition-operated power supply (15/54)
also supplies - via fuse
F4
of
B98A
- the
fuel pump relay
J15
, which is excited by a control signal
(earth) from pin 29 of connector C of control unit
M10
.
It 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
service conditions.
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 to pin
40 of the same connector.
Engine temperature sender unit
K36
receives
a reference earth from pin 28 of 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()
.
The (first) hot Lambda probe
K40
provides
control unit
M10
with information on the correct composition
of the air-fuel mixture in the three cylinders of one head. The
signal is sent to pin 32 of control unit connector C, while pin
31 provid| ... DATA ERROR - CROPPED TEXT | Ошибка данных - Текст обрезан ... |
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