Iveco Daily. Manual — part 436
270
ELECTRIC/ELECTRONIC SYSTEM
D
AILY
Base - May 2004
1. VBT waring lamp - 2. Suspension control unit (ECU, pneumatic supply unit) - 3. Chassis lifting switch - 4. Chassis lowering
push-button - 5. Manual control button - 6. RH air spring - 7. Level sensor - 8. LH air spring
Figure 314
85724
ELECTRIC/ELECTRONIC SYSTEM
271
D
AILY
SYSTEM COMPONENTS
Electronic Control Unit (35C - 40C - 45C)
The electronic control unit controls different chassis positions in accordance with the driver's requests.
As the ignition key switch is turned to ON position, the electronic central unit runs a system check while the red warning lamp
on the dashboard panel comes on for about 5 seconds.
If no failures are detected, this warning lamp shall turn off, otherwise an automatic blink code shall be started with the following
meaning:
Slow blinking
-
Electric compressor overload due to prolonged manual actuation.
Fast blinking
-
Electric compressor overload
Fixed on
-
Level sensor cable
Off
-
Supply failure
Dimmed light
-
Wrong button operation (simultaneous action) or button connecting cabling failure.
The control unit is fitted with a warning led 1" connected to the warning lamp on the dashboard panel, and a set of five
connectors 2" of which only 1, 3 and 5 are used.
Connector
Pin
Function
Cable colour
1
Signal from level sensor
White
2
Signal from level sensor
Brown
1
3
Positive from level sensor
Yellow
1
4
Negative from level sensor
Green
5
-
-
6
-
-
1
Signal from lifting switch
Grey
2
Negative for trim variators
Green
3
3
Signal from lowering switch
Brown
3
4
Negative for failure warning light
Yellow
5
Key-controlled positive
Pink
6
Signal from handbrake switch
White
1
Electric compressor control remote-control switch positive
White
2
Discharge solenoid valve control positive
Yellow
5
3
Positive from battery
Red
5
4
Negative from battery
Black
5
-
-
6
-
-
Figure 315
000373t
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ELECTRIC/ELECTRONIC SYSTEM
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AILY
Base - May 2004
Pin
Cable colour
Function
1
Pink
+15
2
Yellow
Warning light bulb
3
Green
Button negative
4
White
Signal from handbrake
5
Brown
Lowering button
6
Grey
Lifting button
7
-
Free
8
-
Free
9
-
Free
10
-
Free
11
-
Free
12
Black
Tachograph
13
White
Signal from level sensor for lifting
14
Brown
Signal from level sensor for lowering
15
Yellow
Positive for level sensor
16
Green
Negative for level sensor
17
Green
Earth
18
Pink
+30
19
Brown
Discharge solenoid valve control
20
Grey
Compressor relay 2 control
21
Yellow
Discharge solenoid valve control
22
White
Compressor relay 2 control
Figure 316
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ELECTRIC/ELECTRONIC SYSTEM
273
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AILY
Level sensor
In accordance to the chassis height from floor, the level sensor
shown sends the signals to start chassis leveling to the ECU.
It is connected to the control unit by means of four cables:
- White:
Lifting signal
- Brown:
Lowering signal
- Yellow:
Positive
- Green:
Negative
Pneumatic supply unit
The function of this component is that of distributing or
discharging suspension spring air.
Shows the connection of its internal components of the
supply unit..
Components of the pneumatic supply unit
1 - Air spring relief solenoid valve
2 - Dryer filter
3 - Compressor
4 - Supply filter
5 - Electrical motor
6 - Relief pneumatic valve
7 - Muffler
LEVEL SENSOR
PNEUMATIC SUPPLY UNIT
Figure 317
Figure 318
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000375t
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