Iveco Daily. Manual — part 390
124
ELECTRIC/ELECTRONIC SYSTEM
D
AILY
Base - May 2004
to skid, they inform the control unit which supplies the intake
solenoid valves "8" and the drive valves "6".
At the same time, supplying the motor "5" which drives the
pumps "4" it will be possible to generate the pressure to be
sent to the brake calipers concerned.
The braking force generated in this manner is modulated by
solenoid valves "11" and "12".
During this phase the maximum pressure is limited by the
drive solenoid valves "6" and cannot exceed 90 bar.
The driver is informed of the cutting in of this system by the
flashing of the corresponding warning light on the
dashboard.
If the warning light turns on and glows steadily, there is an
ABD system failure.
ABD DEVICE OPERATING LAYOUT
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Figure 123
ELECTRIC/ELECTRONIC SYSTEM
125
D
AILY
SYSTEM WITH 4 PARALLEL CHANNELS
(11)
The system shown in Figure 124 is used on the following
vehicles: 35 C - 40 C - 45 C - 50 C - 65C.
1. Electrohydraulic modulator - 2. Vacuum pump - 3. Vacuum tank - 4. Vacuum servobrake - 5. Hydraulic control
sockets - 6. Harking brake lever - 7. Harking drum brake - 8. Hear brake disk - 9. Hear brake caliper - 10. Electronic
control unit - 11. Sensor - 12. Phonic wheel - 13. Front brake disk - 14. Front brake caliper
Figure 124
126
ELECTRIC/ELECTRONIC SYSTEM
D
AILY
Base - May 2004
This component integrates both the electronic part and the
electrohydraulic system control modulator.
It comprises the following:
A - Electronic control unit
B - Electrohydraulic modulator
C - Accumulator
It is connected to the hydraulic system by the following
connections:
F - Front axle supply
R - Rear axle supply
LF - Left front axle output
RF - Right front axle output
LR - Left rear axle output
RR - Right rear axle output
It is connected to the electric system through a 31-pin
connector.
CONTROL UNIT/ELECTROHYDRAULIC MODULATOR
C
B
A
RF
RR
F
LR
R
Figure 125
ELECTRIC/ELECTRONIC SYSTEM
127
D
AILY
Electrohydraulic modulator
The f
igure shows the layout of the connection of the
modulator and its internal components.
1. Vacuum servobrake - 2. Electronic control unit - 3. High pressure accumulators - 4. Recovery pumps -
5. Recover pump drive motor - 6. Accumulator for rear axle system - 7. ABD drive solenoid valve (90 bar setting) -
8. One-way abd valve - 9. Intake abd solenoid valve - 10. ABD one-way valve - 11. Low pressure accumulators -
12. Supply solenoid valves - 13. Discharge solenoid valve - 14. One-way quidk pressure relief valves - 15. Front axle disk
brake - 16. Rear axle disk brakes
Pressure increase
Operating the brake pedal, the pressurised oil can reach the
brake calipers as both the drive solenoid valve "7" and the
supply solenoid valves "12" are open.
Figure 126
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