Iveco C78 ENT M50, Installation Instruction

C78 ENT M50

INSTALLATION INSTRUCTIONS

14

FEBRUARY 2003 EDITION

EMB electrical power

Verify whether the power supply voltage to the H connec-
tor, with the engine idling, is no more than 0.4 V smaller than
the battery voltage measured during the test.
Shut the engine down, placing the key in the OFF position,
and test whether the relay K 1 that powers the electronic
engine control unit is de-energized after 2 ÷ 7 seconds

ECU temperature

Check whether the temperature of the surface of the ele-
ctronic engine control unit, after 30 minutes with the engine
at maximum power output, is less than +80 °C.

Engine compartment vacuum

Verify that ambient pressure in the engine room, with the
engine at full load and maximum power output, complies
with the technical data set out herein.

Engine compartment air temperature

Verify that temperature in the engine room, after 30 minutes
underway with the engine at maximum power output, does
not exceed 50°C, or +15°C over outside temperature.

Fuel temperature

Verify that temperature of the fuel in the transfer line, while
underway at maximum power output and with a stable
quantity of fuel in reserve does not exceed 80°C. A higher
value would lead to a reduction in engine performance due
to the safety strategies built in the electronic control unit. If
the fuel tends to reach the maximum allowed temperature,
install a heat exchanger for the fuel.

Exhaust back-pressure

Verify that the back pressure at the inlet of the exhaust gas
duct, with the engine at full load and maximum power out-
put, complies with the technical data set out herein.

Exhaust temperature

Verify that the temperature of the exhaust gas under 
maximum power conditions is close to the prescribed value.

Fuel pressure in fuel supply line

The value of fuel pressure in the transfer loop must be mea-
sured from the purge fitting on the cylinder head. We rec-
ommend using a manometer with oil-damped needle and
end-of-scale at 5 bar.The pressure measured with the engine
idling must be about 3.5 bar and tend to rise slightly as
engine rpm increases.

Instrument and control panel

Check the operation of all indicator lights simulating the
behavior of the sensors connected to them. To reset any
errors that may be stored in the engine electronic control
unit, proceed as follows:

1.

Shut the engine down, rotating the key switch to the
“OFF” position.

2.

While holding down the diagnosing push-button in the
EMB, rotate the key switch to the “ON” position and
keep the diagnosing push-button down for at least 5
seconds

3.

Release the push-button and rotate the key switch back
to the “OFF” position.

At the end of this procedure, the codes of any faults detect-
ed during engine installation operations will be dele-ted from
the ECU. To make sure that no fault data remains stored in
it, and also that there are no additional faults in the system,
proceed as follows:

1.

Rotate the key switch to the “ON” position.

2.

Press the diagnosing push-button making sure that, after
it briefly lights up as a test, the flashing code indicator
light remains off.

If the ECU detects the presence of errors or operating
anomalies, the indicator light will emit the code of the first
stored error with two series of flashes of different frequen-
cy; after a few seconds have elapsed from the end of the
emission, the codes of any subsequent errors will be emitted
if the push-button is pressed again.The repetition of the first
of the emitted code will indicate that all information con-
tained in the memory have been emitted.
Such an event will require a review of the installation, in
order to remove the cause of the error or of the anomaly.
The table containing the explanation of each code is 
provided in the “DIAGNOSTICS” section.