Iveco Daily Euro 4. Manual — part 231
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ELECTRIC/ELECTRONIC SYSTEM
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The negative cables connected to an earth point must be as short as possible and connected to one another in a ”star” connection,
trying to tighten them neatly and adequately.
Additionally, for electronic components the following instructions should absolutely be followed:
- Electronic control units must be connected to the system earth when they have a metal container.
- The negative cables of electronic control units must be connected to both a system earth point, for example the dashboard
earth (avoiding ”serial” or ”chain” connections), and to the negative terminal of the battery/ies.
- Though they are not connected to the system earth/battery negative terminal, analogue earths (sensors) must be perfectly
insulated. Therefore, particular care should be given to the parasite resistances of the terminals: oxidation, clinching defects,
etc.
- In the presence of jointing connectors the unscreened section d, near them, should be as short as possible.
- The cables should be laid on parallel with the reference plane, i.e. as near as possible to the frame/body structure.
- Additional electromechanical systems should be carefully connected to the system earth and must not be set at the side
of the cables of electronic components.
SCREENING BY METAL BRAID OF A CABLE TO AN ELECTRONIC COMPONENT
C. Connector - d. Distance ! 0
Figure 2
88039
ELECTRIC/ELECTRONIC SYSTEM
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In order to eliminate earth, supply, outer/inner lighting bridges between components, ultrasonic welding points have been used.
These are not easily identifiable as they appear along the cables inside the corrugated tube of the various harnesses and they are
isolated from the cables through heat-shrinking sheaths or insulating plastic.
Generally, the cables of the components converge on one side in the different welding points, while on the other only one cable
connects them with the earth or supply.
It is also possible to have several welding points connected to one another in which several cables converge on both sides of
the welding. In this case, the earth or supply cable will be connected to the last weld of the series.
Ultrasonic welding brings considerable advantages, including:
- reduction of electromagnetic interference outside the vehicle
- the almost total reliability of the electric system, due to elimination of the bridges, with lower possibility of faults.
ULTRASONIC WELDING
A. Wiring diagram - B. Technical layout
CONNECTION BETWEEN COMPONENTS
A. Connection through bridges - B. Connection through ultrasonic welding point
B
A
B
A
Figure 3
4886
8576
8577
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03000
Self-rectifying alternator with built in voltage regulator
08000
Starter motor
12006
Motor for adjustable mirrors
12010
Motor for locking right door
12011
Motor for locking left door
12012
Compressor for air conditioning system
12025
Power takeoff motor
12026
Motor, winch control
12027
Motor for opening or closing left side door lock
19005
Thermal starter
19010
Heater plug
20000
Starter battery
22001
Horn
22039
Bell for parking lights on signal
25003
Relay for switching on fog lights
25006
Brake lights relay
25014
Relay for enablement of parking lights with engine off
25023
Relay for disconnection of low beam lights with parking lights on
25104
Relay for switching off Retarder with ABS engaged
25209
Relay for switching off services during starting
25222
Relay for allowing connection of thermal starter
25223
Relay for allowing connection of thermal starter fuel tank with atmosphere
25307
Relay for controlling air conditioning compressor
25336
Relay for engine cooling electromagnetic joint
25337
Relay for disconnecting air-conditioning system compressor
25340
Relay, compressor operation, signal to EDC
25620
Relay for fuel filter clogged signal
25704
Relay for switching NC/NO signal for third steering axle
25705
Relay for enabling point switching on
25810
Relay for controlling diesel heating circuit
25811
Ignition timer relay (KSB)
25818
Relay for switching on heated windscreen
25837
Relay for connection of fuel pump
25858
Relay for EDC connection
25926
Relay for enablement of suspension lifting and stopping of suspension lowering function
25927
Relay for enablement of suspension lowering and stopping of suspension lifting function
25928
Relay, rear window heating
28002
Engine stopping electromagnet
30003
Multifunctional side headlight
30011
Fog light
32002
Front direction indicator
33001
Side direction indicator
33004
Side marker lamp
34000
Multifunctional rear light
34007
Stop light
34009
Rear fog lamp
35000
Number plate light
37001
Front dimensions light
39020
Ashtray light
39022
Courtesy light for cabin interior with adjustable spot light
ELECTRIC/ELECTRONIC SYSTEM
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Lamp for lighting rear hatch
39026
Lamp for lighting side hatch
40011
Electronic tachograph
40030
Sender unit for electronic tachometer
40031
Sender unit for electronic tachograph
40046
Inductive type chassis height sensor (rear axle)
42035
Absolute pressure sensor
42102
Switch signalling handbrake applied
42350
Switch signalling body tilted
42351
Switch signalling air filter blocked
42354
Switch for air suspension system failure
42374
EDC clutch switch
42550
Switch signalling engine oil pressure
42552
Fuel filter clogged indicator switch
42608
Coolant pressure signalling 3-switch assembly
44031
Sender unit, fuel level indicator with w/lamp contact
44033
Insufficient brake fluid level gauge control
44036
Insufficient radiator coolant level gauge control
44037
Insufficient power assisted steering fluid level gauge control
44044
Engine oil low level indicator control
47034
Engine coolant temperature sensor (EGR)
47035
Engine coolant temperature sensor
47104
Switch for engaging engine cooling electromagnet coupling
47106
Switch for engaging diesel fuel heating
47109
Switch for connection of ignition timer (KSB)
47207
Switch/sender unit, engine water temperature indicator
48035
Engine rpm sensor
48042
Engine rpm sensor (on timing gear)
52005
Switch with built in w/l for heated rear view mirrors
52036
Switch with built in w/l for engaging windscreen heater
52082
Switch with built-in w/lamp, fog lights
52083
Switch with built-in w/lamp, hazard lights
52084
Switch with incorporated warning light for switching on rear differential lock
52090
Suspension levelling switch (ECAS)
52091
Switch with incorporated warning light for switching on rearscreen heating
52093
Switch for tail hatch locking safety
52310
Switch for adjustable mirrors
52312
Switch controlling headlamp alignment adjustment
52502
Ignition switch for services with starting
53004
Switch for headlamp washer
53041
Switch for checking EDC system
53051
Suspension lifting switch
53052
Suspension lowering switch
53300
Switch for driver’s side electric window
53302
Switch for passenger side electric window
53501
Switch signalling vehicle stopped
53503
Switch signalling reversing lights
53505
Rear differential lock engaged indicator switch
53509
Switch for switching on interior lights
53565
Switch for signalling brake pedal fully pressed
53590
Switch for bonnet open signal
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