2005 FIAT DUCATO 244 control unit

113GETTING THE BEST OUT OF YOUR VEHICLE
N - Neutral
This corresponds to the neutral po-
sition of a standard manual gearbox.
This position is to be used if the ve-
hicle is to be pushed or towed.
With the engine idling and
the gearshift lever at N the
vehicle tends to move by inertia if
it is not on a level surface: keep the
brake pedal pressed when the lever
is at N.
WARNING
D - Forward gear
This is the position to be used when
driving forward normally. The elec-
tronic control unit controls automat-
ic engagement of the 4 gears depend-
ing on the position of the accelerator,
driving speed, engine rpm, longitudinal
and transversal acceleration and the
type of road.
The electronic gearbox can chose
between different operating pro-
grammes, which range between com-
fortable economy driving and sporty
driving coming into operation between
the lowest and the highest speed.
Pressing the accelerator pedal quick-
ly the gearbox will immediately select
the sportier programme to meet the
request for increased performance. To
disengage the function release the ac-
celerator by at least 1/4 of the stroke. In the same way, during braking a
lower gear is engaged to better exploit
the braking action of the engine. If
there is another bend the new ratio
will be engaged already when slowing
down before the bend, this way at the
end of the bend the gearbox will not
have to shift gear to cope with accel-
eration.
Kickdown
To obtain optimum acceleration, for
example when overtaking, the gearbox
will kickdown by two gears simply by
quickly pressing fully home the accel-
erator pedal (in 1/10 of a second).
Engagement of the next longer ratio
will take place when the maximum
rpm limit is reached.
With the engine at idle
speed and the gearshift
lever at D, the vehicle tends to move
also on a level surface: keep the
brake pedal pressed until moving off.
WARNING

114GETTING THE BEST OUT OF YOUR VEHICLE
SEQUENTIAL MANUAL
OPERATION
For the sequential manual operation
mode, move the lever to the left sec-
tor B-fig. 4with two positions:
(+) = engagement of the higher ra-
tio;
(–) = engagement of the lower ratio.
Moving the gearshift lever to the
manual sector is only possible from
position D: the ratio selected by the
automatic gearbox when the lever is
moved will remain engaged.
When the sequential manual mode is
selected, the display shows the en-
gaged gear fig. 6.
To select the higher ratio move the
lever in the (+) direction and to shift
down move the lever to (–).IMPORTANTIf the request to
downshift would cause engine
overevving, this is eliminated by the
electronic control unit. Moreover, if
the manually engaged gear causes en-
gine overevving, the electronic control
unit will shift gear automatically to the
most appropriate one (AUTO-UP).
When the sequential man-
ual mode has been set and
a high gear is engaged, to acceler-
ate rapidly, for example to over-
take, it is necessary to downshift
by hand: the kickdown feature
cannot be engaged!
WARNING
Engaging the automatic
WINTER programme
(only with lever in “D”)
Press button A-fig. 8to engage the
automatic WINTERprogramme that
makes the vehicle starting in 2
ndgear.
This mode is recommended under
poor grip conditions (snow, ice, mud,
etc.).
Use this function only when required
in poor grip road conditions then con-
tinue driving with the WINTERfunc-
tion off.
The WINTERfunction shall always
be off on slopes.
fig. 8
F0D0241m

117GETTING THE BEST OUT OF YOUR VEHICLE
CONSTRUCTION FEATURES
DUCATO automatic gearbox is con-
trolled electronically with four for-
ward gears and reverse.
It is controlled by an electronic con-
trol unit which handles:
– the torque distributor;
– gearshifting;
– specific programmes.
The gearbox is coupled with a flow
power torque distributor with piloted
antislip device which makes it possible
to obtain demultiplication ratios.
The characteristic of this gearbox
which works without idle gear enables:
– higher compactness and weight re-
duction;
– improved output due to less fric-
tion;
– lower stress of transmission com-
ponents.GENERAL FEATURES
Electronic gearbox control makes it
possible to obtain gearshifting suited
to momentary engine characteristics
with a certain elasticity.
The electronic control unit has the
following task:
– adapting the oil pressure for
gearshifting to the engine torque;
– activating safety functions;
– defining the manual gearshifting
programme;
– system diagnostics.
For controlling these operating log-
ics the control unit uses the follow-
ing signals:
– engine rpm;
– engine temperature;
– engine torque;
– vehicle speed;
– gearbox oil temperature;– gearshift lever position;
– accelerator pedal position;
– brake pedal position.
The control unit also communicates
with the injection system electronic
control unit.
Conditions of use analysed by
the control unit
The control unit analyses each single
condition of use of the vehicle, dis-
criminating it on the basis of the sig-
nals received from the various sensors.
Analysed conditions are the follow-
ing:
– starting (position/accelerator ped-
al changing speed);
– acceleration (accelerator pedal
completely pushing down speed);
– full load (number of engine full load
kickdown signals or position mainte-
nance time);

118GETTING THE BEST OUT OF YOUR VEHICLE
– braking (accelerator pedal release
time and braking system operation);
– type of programme (gearshift se-
lector lever position);
– winter driving (driving wheel
torque reduction);
– driving with trailer or uphill (vehi-
cle speed in relation to transmitted
torque)
– driving downhill (vehicle accelera-
tion in relation to the position of the
accelerator pedal);
– driving in towns or queues (accel-
erator pedal position and vehicle
speed);
– gear required by the driver
(gearshift lever position);
– cold starting (engine temperature).Gearshift programme control
To optimise vehicle handling the
electronic control unit has the fol-
lowing memorised programmes:
– automatic operation;
– manual operation;
– winter driving (to be selected
through buttonWINTER);
– engine warming up;
– protection against excessive gear-
box oil temperature .Automatic programme
This comprises 16 gearshifting pro-
grammes.
In relation to the vehicle speed and
torque transmitted, the control unit
detects the slope of the road surface
and depending on the sporty features
chosen, it autonomously chooses the
programme most suited to the situa-
tion.
During gearshifting, the gearbox con-
trol unit asks the injection control unit
to momentarily reduce the torque.
The duration of torque reduction
varies depending on the travelling con-
ditions.

119GETTING THE BEST OUT OF YOUR VEHICLE
Manual sequential programme
This function enables manual se-
quential use of the gearbox merely
moving the selector lever to the left.
Each time the lever is pressed only
one gear is shifted: more than one shift
cannot be obtained.
To avoid overevving or excessively
low engine rpm, the control unit in-
hibits requests for gearshifting that
would cause such situations.
Winter driving programme
This programme is engaged by press-
ing button WINTERnear the
gearshift lever,
in case of driving wheel skidding and
it changes to specific gears.
Starting is possible only in 2
ndgear.
On snowy roads use however snow
chains and/or tyres.
The WINTERfunction shall always
be off on slopes.Engine warming up programme
This programme allows the engine to
reach normal operating temperature
in the shortest time possible (de-
pending on the outside temperature)
highering the gearshifting points, in re-
lation to engine temperature.
The programme engages automati-
cally after starting, if the engine tem-
perature is below 30 °C and it remains
active up to 34 °C.
Excessive gearbox oil
temperature programme
This is activated when the gearbox
oil temperature reaches 120 °C and it
remains active down to 117 °C.
To facilitate oil cooling, this pro-
gramme inhibits gearshifting, either up
or down. It is however possible to use
the manual programme.
SAFE DRIVING
In designing Ducato, Fiat has made
every effort to come up with a vehicle
able to provide driver and passengers
with top-class levels of safety. Never-
theless it is always the behaviour of the
person at the wheel that determines
road safety.
In the following pages you will find
some simple tips to help you travel in
safety under different conditions. You
will no doubt be familiar with many of
them already but it will be useful to
read them all carefully.

129GETTING THE BEST OUT OF YOUR VEHICLE
TOWING A TRAILER
IMPORTANT
The vehicle must be fitted with a ho-
mologated tow hitch and suitable elec-
trical system for towing a caravan or
trailer. Have the tow hitch fitted by an
expert who will issue specific docu-
mentation for use on roads.
Fit special wing mirrors in accor-
dance with the highway code.
Remember that towing a trailer
makes it harder for the vehicle to
climb the maximum gradients speci-
fied, increases braking and overtaking
distance, proportionally to the overall
weight of the trailer.
Engage a low gear when driving
downhill rather than constantly brak-
ing.
The weight the trailer exerts on the
vehicle’s tow hitch coupling reduces
the vehicle’s payload by the same
amount.In order to be sure you are not ex-
ceeding the maximum towing weight
(shown in the log book) you have to
take into account the trailer weight ful-
ly laden including the accessories and
personal luggage.
Do not exceed the speed limits for
towing a trailer in the country you are
driving in. In any case, do not exceed
the top speed of 100 km/h.TOW HITCH INSTALLATION
The tow hitch must be fixed to the
body by an expert in accordance with
the following instructions and re-
specting the additional and/or integra-
tive information provided by the tow
hitch manufacturer.
The tow hitch to be fitted must com-
ply with the current regulations in
force, with reference to Directive
94/20/CEE and subsequent modifica-
tions.
Use a tow hitch suited for the maxi-
mum towable load of the vehicle version
on which the tow hitch is to be fitted.
Use a unified coupling for the elec-
trical connections. The coupling is gen-
erally fitted on a specific mount fas-
tened to the tow hitch.
For the electrical connections, a 7 or
13 pole 12VDC coupling must be used
(CUNA/UNI and ISO/DIN standards).
Follow the instructions provided by
the manufacturer of the vehicle and/or
the tow hitch.
For the electric connections use the
proper trailer light control unit.
Under no circumstances
modify the vehicle’s braking
system for trailer braking control.
The trailer braking system must be
completely independent from the
vehicle hydraulic system.
WARNING
Where your vehicle is
equipped with ABS, re-
member that this has no effect over
the trailer braking system. Particu-
lar care must be taken on slippery
surfaces.
WARNING

136IN AN EMERGENCY
JUMP STARTING
If the battery is flat, you can use an-
other battery to start the engine. Its
capacity must be the same or slightly
greater than the flat battery.
Proceed as follows fig. 1:
1) connect positive terminals1and
2 (+sign near terminal) of the two
batteries with a jump lead;
2) with a second lead, connect the
negative terminal 3(– sign near the
terminal) of the auxiliary battery to an
earthing point 4(E) on the engine or
gearbox of the vehicle to be started;IMPORTANTDo not directly
connect the two negative terminals:
sparks could ignite the flammable gas
from the battery. If the other battery
is fitted in a vehicle, prevent acciden-
tal contacts between the metal parts
of the two vehicles.
3) Start the engine.
4)when the engine has been start-
ed, remove the leads reversing the or-
der above.
If the engine fails to start after a few
attempts, do not keep turning the key
but have the vehicle seen at a Fiat
Dealership.
fig. 1
F0D0203m
Under no circumstances
should a battery charger
be used to start the en-
gine: it could damage the elec-
tronic systems and in particular
the ignition and injection control
units.
Do not carry out this pro-
cedure if you lack experi-
ence; if it is not done correctly it
can cause very intense electrical
discharges and the battery might
even explode. The liquid in the bat-
tery is poisonous and corrosive.
Keep it away from the eyes and
skin. You are also advised not to put
naked flames or lighted cigarettes
near the battery and not to cause
sparks: risk of fire and explosion.
WARNING

153IN AN EMERGENCY
System/Component
CBA (battery fusebox)
Body-builders’ current socket
Alternator
Alternator (2.0 - 2.0 JTD with heating system)
Alternator (2.8 JTD with heating system - 2.0 JTD
with climate control system)
CVM protection
CFO protection
CFO (optional fusebox under the dashboard on passenger’s side
for LH drive versions, on driver’s side for RH drive versions)
Webasto unit
Additional climate control
Chronotachograph
Phone
Alarm
Remote control
ABI for right power window
ABI for door lock
Alarm blinker
Rotating lights (Ambulance versions)
Webasto timer
ABI for left power window
Food box power
Additional heater fan
Left heated rear window
Door mirror defrosting device
Right heated rear window
Driver’s seat warmerFuse no.
F 73
F 72
F 72
F 72
F 70
F 71
F 61
F 56
F 34
F 34
F 34
F 34
F 48
F 38
F 60
F 63
F 58
F 47
F 59
F 57
F 54
F 41
F 40
F 45Ampere
70
125
70
100
150
80
20
30
10
10
10
10
20
20
10
30
5
20
15
15
15
10
15
15Location
Fig. 34
Fig. 34
Fig. 34
Fig. 34
Fig. 34
Fig. 34
Fig. 38
Fig. 38
Fig. 38
Fig. 38
Fig. 38
Fig. 38
Fig. 38
Fig. 38
Fig. 38
Fig. 38
Fig. 38
Fig. 38
Fig. 38
Fig. 38
Fig. 38
Fig. 38
Fig. 38
Fig. 38