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Iveco Daily. Manual - part 390

124

ELECTRIC/ELECTRONIC SYSTEM

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

ÓÓÓÓÓÓ

ÓÓÓÓÓ

Figure 123

ELECTRIC/ELECTRONIC SYSTEM

125

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

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

Figure 125

ELECTRIC/ELECTRONIC SYSTEM

127

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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