English
is170 Rev. 190598 - 0
Pag. 14
Computer Programmed Functions
Oxigen sensor
6
The Lambda feeler supplies information on the amount of oxygen present in the exhaust
gas to consequently adjust carburetion. In the presence of a lot of oxygen we would have
a basically POOR carburetion (little GAS), on the contrary in the presence of little oxygen
we would have a RICH carburetion (a lot of GAS). In order to identify the wire of a lambda
feeler, we suggest using a multimeter, better if digital. Set the instrument to measure
continuous voltage, set a rod to earth (battery) and with the other rod check which wire has
a variable voltage. It is important that the vehicle is warm before measuring is done.
A relay has been put inside the ”VOILA PLUS” (only for those vehicles whose panel box
performs no diagnoses on injection) and its function is that of injector detaching. When
switching on from PETROL to GAS, there is a time foreseen
(called overlapping) in
which injector functioning is not immediately locked. This in order to allow the GAS to exit
from the reducer and reach induction, thus avoiding feed gaps and consequently
backfiring. In this way, during switching the two fuels (PETROL and GAS) will overlap for
a time that can be adjusted.
Injector disconnect
8
The engine rpm signal can be taken directly from the coil negative or from the revolution
counter signal.
It is, however, important that it is connected to the “VOILA PLUS”
panel box in order to ensure correct operation.
Negative coil
or
rev. counter signal
7
N° PIN
WIRE COLOUR
USE
1
LIGHT-BLUE 0.5
Stepper motor control (A)
2
VIOLET 0.5
Stepper motor control (D)
3
VOID
- - - - - - - - - - - - - - - - - - - - - - - - - - - -
4
VOID
- - - - - - - - - - - - - - - - - - - - - - - - - - - -
5
BLUE-YELLOW
To TPS wire signal
6
VOID
- - - - - - - - - - - - - - - - - - - - - - - - - - - -
7
YELLOW
Injector Cut-off
8
BLACK
Earth
9
VOID
- - - - - - - - - - - - - - - - - - - - - - - - - - - -
10
VOID
- - - - - - - - - - - - - - - - - - - - - - - - - - - -
11
VOID
- - - - - - - - - - - - - - - - - - - - - - - - - - - -
12
WHITE 0.5
Stepper motor control (B)
13
ORANGE 0.5
Stepper motor control (C)
14
VIOLET
To lambda feeler wire signal (feeler side)
15
GREY
To lambda feeler wire signal (panel box side)
16
BROWN
Engine R.P.M.
17
VOID
- - - - - - - - - - - - - - - - - - - - - - - - - - - -
18
YELLOW
Injector cut off
19
BLUE
Change-over switch GAS position (Gas service exit)
20
RED - BLACK
+ 12V Battery
21
VOID
- - - - - - - - - - - - - - - - - - - - - - - - - - - -
22
VOID
- - - - - - - - - - - - - - - - - - - - - - - - - - - -
Description of connector wire layout
Ignition type
4 - 5 - 6 - 8 (cyl.) – coilpack – one coil for cyl.
RPM signal time
Standard - small signal.
COMPUTER PROGRAMMED FUNCTIONS
COMPUTER PROGRAMMED FUNCTIONS
COMPUTER PROGRAMMED FUNCTIONS
Overlap time
adjustable from O sec. to 1sec
0
-
1V
0
-
5V A type (actually not used)
0
-
5V B type
5
-
0V A type
5
-
0V B type (actually not used)
0,8 -
1,6V
O2 sensor type
O2 simulation
Open loop starting time
Always lean - square wave, standard or build wave-
O2 sensor open circuit.
from 5 a 1275 sec.