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Iveco Daily. Manual - part 392

132

ELECTRIC/ELECTRONIC SYSTEM

AILY

Base - May 2004

The following table shows the pin out of the control unit in question.

Function

Cable

colour code

Right rear sensor

Right front sensor (only for 35 C - 40 C - 45 C - 50 C - 65 C vehicles)

Right front sensor

Right front sensor (only for 29 L - 35 S vehicles)

Left front sensor

Left rear sensor

Line K to pin 4 38-pin connector for diagnostics

8817

Line L to pin 3 38-pin connector for diagnostics

8818

Negative for third brake relay

0315

Positive from stop light switch

1173

Key-operated positive

8847

Earth

0000

Direct positive

7772

Direct positive

7772

Earth

0000

Negative for ABS failure warning light

6670

Negative for EBD failure warning light

6673

Negative for ABD operating warning light

6674

31
26

Figure 131

ABS 8/ESP 8

The ABS 8 system integrates the following functions:

- ABS - Antilock Braking System

It prevents wheels from being locked during braking, thus making it possible to avoid possible obstacles.
It prevents losing control of the vehicle when braking on a slippery surface (even on one side only

→ mu-split).

It also reduces the braking distance compared with the one with the wheels locked.

- EBD - Electronic Brake Force distribution

It supersedes and optimizes the function of current hydraulic brake correctors, by better controlling the braking force on
rear wheels.
It is implemented by adding a special software to the ABS, and comes into action within a given time interval prior to ABS
actuation.
It makes it possible to control any locking condition affecting the rear wheels compared with the front wheels, by optimizing
the braking force under different load, running and vehicle utilization conditions.

The ESP 8 system, in addition to the ESP 8 system, incorporates the following functions:

- ESP - Electronic Stability Program

It monitors the vehicle behaviour continuously (both along straight stretches and bends, when braking or accelerating).
It also monitors the driver’s actions: steering the wheel, pressing the brake pedal, accelerator position, and speed.
It is always active in the background, i.e. the ESP system compares the actual vehicle ride with the driver’s desired ride 50
times a second. It recognizes dangerous situations before the driver does.
The system considers the different possibilities of coming into operation. It brakes on every single wheel separately.
It operates on the engine control system.

- ASR — Acceleration drive control device

This system prevents driving wheel skid through quick action on the engine and brakes. It allows the vehicle to set off safely
and fast even on slippery roads or when one driving wheel is skidding. It also reduces the risk of understeering when you
accelerate too much when cornering.

The ABD (Automatic Brake Differential) function is available only in systems of the ABS 5.3 type.

NOTE

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AILY

- MSR — Engine braking torque control

This system avoids driving wheel drag due to the exhaust brake. It ensures vehicle stability when releasing on slippery roads
(e.g. snow, ice), and assists in keeping the path when cornering and shifting down, especially on slippery roads. It requires
a slight increase of revs number, through the CAN line.

- HHC — Hill holder control

This function allows the vehicle to be kept automatically locked (braked) until the clutch is closed and the driver
subsequently presses the accelerator pedal, thus preventing undesired vehicle motion.
The function is actuated automatically: the braking situation is detected by the sensor inside the modulator. When the brake
pedal is released, the vehicle will be kept for 2.5 seconds, thus allowing the driver/system to put the gear (and the vehicle
to be started). This ensures safe, easy start with any incline, regardless of the weight carried.

- HBA (Hydraulic Brake Assistant) — Hydraulic assistant in emergency braking

The main feature of the HBA function is to recognize an emergency braking situation followed by “automatic” increase
of vehicle deceleration.
Vehicle deceleration is only restricted to actuation of ABS control, thus taking the greatest advantage of the grip between
the tyre and the roadbed currently available. Therefore, ordinary drivers can now achieve braking distances which only
experienced drivers could achieve in the past.
If the driver reduces the braking intensity, vehicle deceleration is reduced depending on the reduction of the force applied
onto the pedal.
Therefore, the driver can control deceleration accurately after overcoming the emergency situation.
The extent of the braking request from the driver corresponds to the force applied onto the pedal. Such force is derived
from measuring the pressure in the brake pump.

Application of the ABS 8/ESP8 systems

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ELECTRIC/ELECTRONIC SYSTEM

AILY

Revi - February 2005

ABS8

ESP8

X (crossed)

II (parallel)

X (crossed)

II (parallel)

VEHICLES

F1A engine with 6 AS 300 VD

automatic gearbox

F1A and F1C engines

29L — 35S

35C — 65C

29L — 35S

35C

Four crossed channel system (x)

Electro-hydraulic modulator/control unit

1. Hydraulic accumulator - 2. Electro-hydraulic modulator - 3. Electronic control unit - A. ABS8 connector - B. ESP8

connector - MC1. LF/RR diagonal power supply (or FL/RR with ABS8/ESP8 systems) - MC2. RF/LR diagonal power supply (or
FR/RL with ABS8/ESP8 systems) - LF (or FL with ABS8/ESP8 systems). Left front axle output - RR. Right rear axle output - RF

(or FR with ABS8/ESP8 systems). Right front axle output - LR (or RL with ABS8/ESP8 systems). Left rear axle output

102113

Figure 131/1

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