Iveco Daily. Manual — part 412

176

ELECTRIC/ELECTRONIC SYSTEM

D

AILY

Base - May 2004

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.

1. Phase identification holes

1. Distributing shaft pulley - 2. Sensor

PERSPECTIVE VIEW

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

1

3

2

Figure 188

Figure 189

0003320t

0003321t

Figure 190

85712

85713

ELECTRIC/ELECTRONIC SYSTEM

177

D

AILY

Base - May 2004

Figure 191

85723

177/1

ELECTRIC/ELECTRONIC SYSTEM

D

AILY

Revi - February 2005

Figure 191/1

101882

ELECTRIC/ELECTRONIC SYSTEM

177/2

D

AILY

Component code

Description

I

Connection to hood cab cable

19010

Preheat plug

25231

Plug insert centre

47035

Coolant temperature sensor

47106

Fuel heat on switch

48035

Engine rpm sensor

48042

rpm sensor on distributor

61101

Fuel heat resistor

70064

1-way fuse holder

78013

Pressure adjustment electro valve

78247

Electrical injection electro valve

85150

EDC center

85157

Fuel pressure sensor

85156

EDC blower air pressure sensor