Iveco N60 ENT M37, Technical And Repair Manual, Page: 48 / 194

The amount of fuel that feeds the high pressure pump is
metered by the solenoid valve connected to the low pressure
system.The solenoid is normally open and managed by a ECU
EDC PWM signal to obtain a high pressure value ranging
between 250 and 1600 bar. The choice to use a normally
open valve enables to maintain a good engine functionality
even in the case of an interruption of the control circuit.
The component has a resistance of about 2.8
Ω
and is con-
nected to ECU EDC by pins A5 and A7.
Throttle lever position
It provides the primary indication for the reckoning of the
fuel amount to be injected.
It is operated by the linkage of the controls on bridge or
assisted, produces in output a potentiometric variation of the
voltage which supplies it, in relation to the position where
the throttle lever is set.
A simultaneous safety indication is provided by the internal
switch to confirm the acceleration position: minimum - out
of minimum.
Such an indication in addition to the self-adative strategies of
the potentiometric signal, is used in the case of anomalies to
manage “limp-home strategies, that enables to get back to
harbour notwithstanding the potentiometer being faulty.
N60 ENT M37 OVERVIEW
1.48
APRIL 2004
04_068_N
Figure 62
Pressure control solenoid
A. Solenoid connector.
A
04_069_N
Figure 59