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DAF XF105. Manual - part 103

200528

3-31

Control functions

DMCI ENGINE MANAGEMENT SYSTEM

XF105 series

4. Fuel temperature correction
When the fuel temperature is low, the density is

high. This means that there is more "energy" in

the quantity of injected fuel. The engine could

become thermally and also mechanically

overloaded as a result. This can be avoided by

adjusting the quantity of fuel to be injected in

relation to the fuel temperature (F713).

Relevant components

Fuel pressure and temperature sensor

(F713)

Pump units (B131 to B136)

Injectors (B421 to B426)

5. Engine oil pressure protection
If the engine oil pressure (F744) drops below a

specific minimum value, the maximum speed is

limited. Also, a warning is activated in the DIP

main display.

Relevant components

Engine oil pressure and temperature sensor

(F744)

Crankshaft sensor (F552)

Pump units (B131 to B136)

Injectors (B421 to B426)

VIC-2 (D310 via V-CAN1)

6. Engine speed protection when engine is
cold
The engine speed limitation is active when the

engine is started and the coolant temperature is

under a certain value. From that moment a limited

maximum engine speed (1500 rpm) will be

maintained for a certain time (maximum 30

seconds).

Relevant components

Coolant temperature sensor (F566)

Crankshaft sensor (F552)

Pump units (B131 to B136)

Injectors (B421 to B426)

7. Excess engine speed detection
It is possible that the engine speed will exceed

the maximum engine speed during a descent. If

the engine speed exceeds the maximum engine

speed by too much then engine over-speed will

be detected. At that moment an error code which

can not be erased by the dealer and the duration

of the engine over-speed are stored in the

electronic unit. At the same time a warning is

shown on the display "Engine speed too high".

Relevant components

Crankshaft sensor (F552)

VIC-2 (D310 via V-CAN1)

DMCI ENGINE MANAGEMENT SYSTEM

3-32

200528

Control functions

XF105 series

3.14 VEHICLE SPEED LIMITING FUNCTIONS

There are three possible vehicle speed

limitations:

Statutory vehicle speed limitation (standard)

Variable vehicle speed limitation (optional)

Vehicle speed limitation for special

applications (optional)

When this function is active, the DMCI electronic

unit adjusts the injection of fuel so that the

programmed vehicle speed cannot be exceeded

irrespective of the position of the accelerator

pedal.

Vehicle speed limitation laid down by law

Legally prescribed vehicle speed limiting is a

programmed speed that is prescribed by law.

This speed is programmed in the factory and can

only be changed by special request and at your

own risk.

Variable vehicle speed limitation
The variable vehicle speed limitation can be

activated by way of the steering column switch

(C907 - 5) or the "SET" button of the steering

wheel switch (C916 - 1). The function can only

be activated if the vehicle speed is higher than

30 km/h. At the moment that the rotary switch of

the steering column switch (C907 - 5) is turned

downwards or the "SET" button of the steering

wheel switch (C916 - 1) is operated then the

vehicle speed at that moment is stored in the

DMCI electronic unit as the variable limitation

speed. DMCI receives a CAN message from

VIC-2 for this.

The set variable limiting vehicle speed is shown

in the master display of the instrument panel. It

will not be possible to exceed the limiting speed

irrespective of the position of the accelerator

pedal.

i401002

D965

1 2

high-side

low-side

Cyl.6

B136

1 2

high-side

low-side

Cyl.5

B135

1 2

high-side

low-side

Cyl.4

B134

1 2

high-side

low-side

Cyl.3

B133

1 2

high-side

low-side

Cyl.2

B132

A12

A23

A24

A15

A19

A16

A11

A20

1 2

high-side

low-side

Cyl.1

Pump units

B131

1 2

high-side

low-side

Cyl.6

B426

1 2

high-side

low-side

Cyl.5

B425

1 2

high-side

low-side

Cyl.4

B424

1 2

high-side

low-side

Cyl.3

B423

1 2

high-side

low-side

Cyl.2

B422

1 2

high-side

low-side

Cyl.1

Injectors

B421

Pedal
Sensor

Vehicle

CAN2

low

Vehicle
CAN2
high

A22

A21

A14

A18

A13

A10

A17

ground

signal

supply 5V

ground

signal

CAN2 low

CAN2 high

B A

C D F

F672

B37

B33

B34

B38

B41

B53

B45

Vehicle

CAN1

low

Vehicle
CAN1
high

CAN1 low

CAN1 high

B35

B27

Steering column switch C907

i401010

200528

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Control functions

DMCI ENGINE MANAGEMENT SYSTEM

XF105 series

The speed can be increased by briefly operating

the "SET+" (C907 - 4) or the "+" button (C916 - 5).

The speed can be decreased by briefly operating

the "SET-" (C907 - 3) or the "(C916 - 6) button.

The speed is adapted in increments of 0.5 km/h

each time the "SET+/+" or "SET-/-" switch is

operated. If the "SET+/+" or "SET-/-" switch is

operated for longer, the speed can be increased

using the accelerator pedal.

For safety reasons, it is important that this

function can be (temporarily) switched off quickly,

for example when overtaking. This occurs when

the "kick-down" function is activated by

depressing the accelerator pedal fully. When the

speed drops back down to the set variable

vehicle speed limit, the function is automatically

activated again.

The function is deactivated by turning the

steering column switch (C907) to the centre

position (6) or by operating the "OFF" button

(C916 - 2) of the steering wheel switches. If an

error occurs in the vehicle speed signal, the

function is automatically switched off.

Vehicle speed limiting for special applications
This is a programmed speed that is used for a

special application (such as footboard protection

for a refuse-collection vehicle). The function is

activated via a connection point (4 - "v max

appli.") on the application connector (A068), the

refuse-collection vehicle connector (A095) or by a

switch in the cab.

When this function is active, the vehicle speed

cannot exceed the programmed speed

irrespective of the position of the accelerator

pedal. This programmed speed can be changed

using DAVIE XD. The standard speed is 30 km/h.

When this function is active, the vehicle speed

will vary by no more than +/- 1 km/h and the

acceleration speed is reduced.

If an error occurs in the vehicle speed signal, the

function is automatically switched off.

Relevant components
-

VIC-2 (D310 via V-CAN1)

Steering column switch (C907 via

V-CAN1)

Steering wheel switches (C916 via

V-CAN1)

BBM (via V-CAN2)

Application connector, engine speed

control (A068 pin 4)

Refuse-collection vehicle connector

(A095 pin 4

Tachograph (B525 via V-CAN2)

Vehicle speed signal

Accelerator pedal sensor (F672)

Pump units (B131 to B136)

Injectors (B421 to B426)

Steering wheel switches C916

K102021

DMCI ENGINE MANAGEMENT SYSTEM

3-34

200528

Control functions

XF105 series

3.15 CRUISE CONTROL

When the cruise control function is active, the set

vehicle speed is automatically maintained without

operating the accelerator pedal.

The function is activated by the steering column

switch (C907) in the case of a manual shift

vehicle or by the steering wheel switches (C916)

in the case of an AS Tronic. By operating "SET +"

(C907 - 4 / C916 - 5) or "SET- " (C907 - 3 / C916

- 6), the DMCI receives a CAN message from

VIC-2 via V-CAN1. The current vehicle speed is

then stored as the cruise control speed. The

function can also be activated using the "RES"

(C907 - 7 / C916 - 3) switch (Resume). The

vehicle will then maintain the speed that was

used when the cruise control function was last

active. If the vehicle ignition has been switched

off in the meantime, the "RES" speed is erased

and cruise control cannot be switched on using

the "RES" switch.

i401001

kl.15

1 2

high-side

low-side

Cyl.6

B136

1 2

high-side

low-side

Cyl.5

B135

1 2

high-side

low-side

Cyl.4

B134

1 2

high-side

low-side

Cyl.3

B133

1 2

high-side

low-side

Cyl.2

B132

A12

A23

A24

A15

A19

A16

A11

A20

1 2

high-side

low-side

Cyl.1

Pump units

B131

1 2

high-side

low-side

Cyl.6

B426

1 2

high-side

low-side

Cyl.5

B425

1 2

high-side

low-side

Cyl.4

B424

1 2

high-side

low-side

Cyl.3

B423

1 2

high-side

low-side

Cyl.2

B422

1 2

high-side

low-side

Cyl.1

Injectors

B421

brake
relay
engine

B40

ground

gearbox

Accelerator

Pedal Sensor

Vehicle

CAN2

low

Vehicle
CAN2
high

E599

switch
neutral
position

E593

switch
neutral
position

E013
(10A)

A22

A21

A14

A18

A13

A10

A17

ground

signal

supply 5V

ground

signal

CAN2 low

CAN2 high

ground

gearbox

B51

B36

37A

G489

E575

B A

C D F

HALL

clutch

switch

F672

B37

B33

B34

B38

B41

B53

B45

Vehicle

CAN1

low

Vehicle
CAN1
high

CAN1 low

CAN1 high

B35

B27

D965

Steering column switch C907

i401010

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