Iveco Daily Euro 4. Manual — part 111

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The electronic central unit receives signals from sensors/switches; on these signals, it bases management and control of the
system in the different operation conditions of the gearbox.

It is interfaced with other electronic systems on board, such as EDC and ABS, through CAN communication lines.

A - Gearbox side connector

B - Vehicle side connector

Figure 6

90135

From the connection to EDC 16 system, gearbox central unit is able to detect accelerator pedal position and engine rpm’s.

Connection with ABS8/ESP8 central unit is used to prevent gear shift ”UP” on bending and manages the drive in low adhesion
conditions in case of drive in mode ”A” (automatic mode).

New ABS system manages ”intelligent” warning lamps integrated into board panel. Their going on shows a failure in braking
system.

Signal ”Brake”, at start up, is directly coming from EDC central unit.

Reverse gear signal is direct.

NOTE

Figure 7

90136

Central unit location

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Figure 8

107211

Gears actuator has the task of continuously exchanging gears selection and engagement information with electronic central unit.

It is made up of two electrical motors, drive cylinders, and their sensors.

Clutch actuator

Figure 9

90138

1. Actuator cylinder - 2. Electrical motor - 3. Vehicle electrical wiring harness junction block

It is made up of:

- One cylinder operating on clutch engaging/disengaging lever.

- One position sensor detecting clutch lever travel and acquainting the electronic central unit of actuator cylinder position

and clutch disk wear.

Gears actuator

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To detect engine idling position and enable clutch entering at vehicle start, N.O. switch is used with pedal released; the switch
is integrated in position sensor.

This signal comes to EDC central unit and is sent to gearbox central unit through VDB (Vehicle Data Base) CAN line.

During ride, ”kick down” function can be activated in automatic mode.

In conditions where the pedal is 98% pressed, e.g. on overtaking, the system automatically shifts down by one gear, so allowing
to best exploit the drive torque.

In practice, if accelerator pedal is fully pressed, a drive with an engine rotation speed with higher gear shift is chosen.

Display unit

Figure 10

112601

The display unit, positioned on instrument panel allows to display all information needed for system correct use, e.g.:
- Mode: manual or automated, and, in both cases, gear ratio entered;
- Reverse/neutral (R/N) position;
- Faults signalling:

-

SERVICE: gearbox failure

-

SERVICE: serious gearbox failure (associated to acoustic warning signal)

-

SERVICE: excessive clutch temperature (associated to acoustic warning signal)

-

Gearbox failure in ”SERVICE” mode (this message is displayed only at the Dealership Centres)

- Failure code at page 50 can only be displayed through diagnosis tool.
- Vehicle status: gear entered.

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the lever leftwards. In this way, entered gear / rpm is not lost on shifting.

- Capability to skip gears: by repeatedly operating the lever, a gear which is correct and suitable to the speed is entered (3-4

gears can be skipped, too).

- Central ”N” - Neutral - position and ”R” - reverse positions are stable.

- The gearbox shows that gear with which you stopped. Should the gear be entered, the system opens the clutch in order

to enable engine start up.

- The system optimises the performances by identifying a drive style depending on how accelerator pedal is operated. If

accelerator pedal is fully pressed, a drive with an engine rotation speed with higher gear shift (~ 3900 rpm) is chosen.

- Complete signalling on the display unit showing:

mode (manual or automated)
reverse/neutral position
failure/misuse with sound warning (e.g. clutch overheating).

- On bending, shifting ”UP” is inhibited. This function persists for some metres after the exit from the bend.
Gear shitting
- It is either in manual mode by operating on gears lever or in automated mode. Gear shifting is without releasing the

accelerator pedal. The system opens the clutch, enters the gear and shuts the clutch.

- Clutch pedal is not present.
Vehicle parking
On vehicle putting off operation, the system automatically opens the clutch, then shuts it back, without the need of positioning
the lever to neutral position. In these conditions, the clutch is shut and parking with the gear entered is enabled.

Figure 11

108873

Gear selector