Installation and adjustament manual
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PROGRAMMATION
5.5.2 Display and verification
This command makes it possible to see all the significant
signals used by the ECU in a single screen display
(see Fig. 5.5).
The two buttons at the lower right-hand of the screen allow
the user to go, respectively, to the CHECK ACTUATORS
(ALT-C) or back to the ECU MANAGEMENT (ALT-E)
menu.
Following is a short description of the information
displayed:
1 LAMBDA: This is the value, expressed in volts,
that is output by the Lambda sensor. If the
background is green, this means that the ECU
interprets the input value as a “lean” signal, thus
the ECU increases the flow of fuel. The red
background indicates that the ECU interprets the
input value as a “rich” signal, thus the flow of fuel
is decreased.
2 INTEGRATOR: This value, expressed in steps,
is algebraically summed to the value stored in the
map in order to correct the carburetion. The value
of the corrector is calculated by processing the
Lambda sensor signal in real time.
3 MAP: This is the value, expressed in bar, of the
pressure sensor inside the ECU. This sensor
measures the absolute pressure inside the intake
manifold, which in turn indicates engine load.
4 TPS: This is the value, expressed in volts, of the
throttle position sensor. When the display turns red,
it indicates that the TPS is in idle position.
5 REGULATOR TEMPERATURE: Celsius
degree value of the temperature of the regulator-
vaporizer.
6 REGULATOR PRESSURE: This value,
expressed in bar, indicates the system’s operating
pressure. This value is available only if the pressure
measuring device is connected. The pressure
verification bar indicates whether the pressure is
high, low, or correct.
7 ENGINE RPM: Indicates the actual engine RPM.
8 OTHER CHECK-UPS: Indicates the fuel level
and the type of fuel used (LPG or petrol).
5.5.3 Actuators verification
The actuators verification screen (Fig. 5.6) works only
when the ECU is connected to the Personal Computer.
Specifically, the engine is to be OFF with the KEY
TURNED TO THE ON POSITION.
In this screen, four buttons are displayed; the buttons allow
the activation or deactivation of as many TESTS:
1
Idle Stepper Motor Sequence: The idle/low power
stepper motor performs an open/closed sequence.
2
Power Stepper Motor Sequence: The medium/high
power stepper motor performs an open/closed
sequence.
3
Fuel Indicator Sequence: The switch/fuel level
indicator performs a sequence during which all the
LEDs are lit, thus verifiying their correct operation.
4
Open/closed LPG Electovalve Sequence: At each
pushing of the button, the LPG electrovalve
switches from OPEN to CLOSED, and vice-versa.
To access this screen, the program must have established
a link with the ECU. Moreover, it is necessary to turn the
ignition key OFF, then key ON engine OFF again after a
few seconds. In this way, it is possible to access the
“Actuator Verification” screen. To exit the “Actuator
Verification” screen, it is necessary to turn the ignition
key off.
5.5.3.1 How to verify the operation of the actuators
To verify for the correct operation of the actuators, proceed
as follows:
1
Disassemble the actuator(s), being careful not to
damage the O-Rings.
2
Start the test of the pertinent actuator by clicking on
the ACTIVATE TEST button. This test drives the
actuator to perform a sequence of alternate motions
for the duration of one minute. The sequence can be
interrupted by clicking on the same button that has
started it.
3
Once the testing is complete, turn the ignition key off
and reassemble the actuator(s), being careful to
correctly position the O-Rings.
Please Note: the correct positioning of the O-RIngs is of
special importance. If the O-Rings are not correctly
positioned, fuel will leak from the actuators’ seats.
5.5.3.2 How to verify for the correct operation of
the LPG electrovalve
To verify for the correct operation of the LPG electrovalve,
it is necessary to connect the pressure measuring device
to the pressure regulator. Then, by clicking on the OPEN
ALT. FUEL ELECTROVALVE, the electrovalve is
opened, the fuel reaches the regulator-vaporizer, and from
there the fuel reaches the proportioner. Since the “cut-
off” electrovalve is not energized, the fuel is not allowed
to reach the distributor. In the area marked REGULATOR
PRESSURE in Fig. 5.6, a pressure value between 0.6 and
Fig.5.6
