Iveco Daily. Manual - part 415

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Figure 201

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Timing sensor (stroke)

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RPM sensor

A  phonic  wheel  is  fitted  on  the  drive  shaft.  As  the  sensor

detects existing teeth passing, it provides the central unit with

the signal that is necessary to determine engine r.p.m.'s.
The variation of the signal generated by the lack of some teeth

(synchronisation  gap) occurring at each drive shaft turn is the

reference signal which enables the central unit to detect the

lead of the pair of pistons 1-4 with respect to PMS.
This signal is also used by the control unit to detect the engine

rotation speed, the duration of injection and to control the

rev counter.

Phonic wheel mounting

1. Phonic wheel

TECHNICAL VIEW OF THE SOUND WHEEL AND

SENSOR

1. Sound wheel - 2. Sensor

Figure 202

Figure 203

Figure 204

0003319t

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These are inductive sensors.
The flywheel sensor (48035) is connected at pins 27 and 12

of connector A of the control unit.

Timing sensor

A  semiconductor  layer,  immersed  in  a  magnetic  field  and

through which current flows, generates a potential difference

(called Hall voltage) at its ends.
If current intensity remains constant, the generated voltage

depends  only  on  the  magnetic  field  strength:  periodical

variation of field strength is enough to obtain a modulated

electric signal.
The smooth portion of the phonic wheel (distributing shaft

pulley)  covers,  while  moving, the sensor, thus blocking the

magnetic field with resulting low output signal.
On the contrary, the sensor generates a high signal next to

the openings and when a magnetic field is available.
Phase sensor signals are acquired, and the engine position is

recognized according to the sequence of the phonic wheel

notches.
The  mounting  function  makes  it  possible  to  identify  signal

errors and interferences (if any).
The resulting signal is supplied to the processor that controls

the injection system.
The sensor (48042) is connected to the central unit at pins

A20/50/11.

RPM SENSOR AND CONNECTION CABLE

SENSOR CONNECTOR AND WIRING DIRAGRAM

TIMING SENSOR

1. Earth - 2. Signal output - 3. Power supply positive

Figure 205

Figure 206

Figure 207

3

1

2

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High-pressure pump

Pressure delivered to the rail is modulated between 250 and

1600 bars by the electronic central unit by operating on the

solenoid valve of pressure regulator.
Pump (3) is oriented on the pump shaft cam.
During aspiration the pump is powered via supply conduit

(5).

The amount of fuel to be sent to the pump is set by pressure

regulator (7).
The pressure regulator stops fuel inflow to the pump based

on PWM input from the centre.
During  pump  compression,  fuel  reaches  a  pressure  level

sufficient to open the pressure valve to common rail (2), and

supplies it via output (1).

1. Output for rail pressure - 2. Rail pressure valve - 3. Pump - 4. Pump shaft - 5. Pump supply conduit - 6. Pressure

regulator supply conduit - 7. Pressure regulator - 8. High pressure pump - 9. Fuel input connection from filter - 10. Fuel

output connection to filter support - 11. Fuel input connection from centre heat exchanger - 12. Fuel output connection

from mechanical pump to filter - 13. Supply mehanical pump

Figure 208

88072

A

B

C

B–B