DAF XF105. Manual - part 105

1

©

 200528

3-39

Control functions

DMCI ENGINE MANAGEMENT SYSTEM

XF105 series

Conditions for deactivation
Downhill Speed Control will be deactivated if:

-

the "OFF" switch (6) is operated or 

-

the speed is < 25km/h (depending on the 

programmed "v max" setting for special 

applications) or 

-

faults occur in the vehicle speed signal or 

-

if the accelerator pedal is operated for a 

certain time and the speed is higher than the 

Downhill Speed Control speed and without 

interrupting the drive line or 

-

errors are detected in the steering wheel 

switch.

Note:

During the "Downhill Speed Control" function 

the cruise control function will not switch off.

Relevant components

-

Accelerator pedal sensor (F672)

-

DEB solenoid valves (B411 to B416)

-

Exhaust brake valve (B192)

-

Crankshaft sensor (F552)

-

VIC-2 (D310 via V-CAN1)

-

Steering wheel switches (C916 via 

I-CAN)

-

AS Tronic (D954 via V-CAN1)

1

DMCI ENGINE MANAGEMENT SYSTEM

3-40

©

 200528

Control functions

XF105 series

3.17 ENGINE SPEED CONTROL

i401008

D965

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

A3

A7

A12

A23

A24

A15

A8

A19

A16

A4

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

shield

Service
brake
relay

service
brake

B40

B40

cabin

ground

ground

gearbox

cabin

ground

Accelerator

Pedal  Sensor

Vehicle

CAN2

low

Vehicle
CAN2
high

E599

switch
neutral pos.

E593

switch
neutral pos.

E013
(10A)

E

D

B

C

N

2 1

signal

return

3

F552

speed

crankshaft

A2

A8

A9

A22

A21

A14

A5

A18

A13

A1

A10

A17

A49

A50

A60

ground

signal

supply 5V

ground

signal

CAN2 low

CAN2 high

ground

gearbox

B51

B36

1

3

4

5

2

G489

E575

E511

2

B A

C D F

1

+

HALL

PRES

-

6

clutch

switch

F672

B37

B33

B34

B38

B41

B53

B45

Vehicle

CAN1

low

Vehicle
CAN1
high

CAN1 low

CAN1 high

B35

B27

kl.30

1000

signal

signal

signal

B8

torque limiter 1

engine speed

Firewall 
connector

x 20 17 3

x

x

x 20

switch

switch

(max. 15A)

17 x

x

x

12C

B11

torque limiter 2

B1

1

©

 200528

3-41

Control functions

DMCI ENGINE MANAGEMENT SYSTEM

XF105 series

Engine speed control
The purpose of this function is to set a constant, 

temporary engine speed higher than the idling 

speed. This function can be used when the 

vehicle is stationary and when driving. The 

function is activated via the steering column 

switch (C831), the steering wheel switches 

(C916) or by means of the application connector 

(A068).

The application connector (A068) is linked to the 

builder module BBM (D993). The BBM in turn 

sends a CAN message via V-CAN2 to the DMCI 

electronic unit (D965). The application connector 

functions have priority over steering column / 

steering wheel switch functions.

The switching-on and switching-off conditions 

have been programmed into the DMCI electronic 

unit; see the document "DAVIE XD test and 

parameter information" for a full description of 

these conditions.

The following components/input signals 

determine whether the engine speed control can 

be activated depending on the programmed 

customer parameter setting:

1.

service brake signal (G469)

2.

clutch signal (E575)

3.

accelerator pedal sensor (F672)

4.

parking brake signal (F000 via VIC-2 

V-CAN1)

5.

engine brake signal (E564 via VIC-2 

V-CAN2)

6.

current engine speed (F552).

7.

the actual vehicle speed (via tachograph 

V-CAN2)

Activation
The engine speed control can be activated in two 

ways using the steering column switch (C907) 

and the steering wheel switches (C916): 

1.

by operating the "RES" key (C907 - 7 / 

C916 - 3).

2.

by operating the "SET+" (C907 - 4 / C916 - 5) 

briefly once.

Steering column switch C907

i401010

1

3

5

6

7

2

4

Steering wheel switches C916

K102021

1

3

5

2

4

6

Steering column switch C907

i401010

1

3

5

6

7

2

4

1

DMCI ENGINE MANAGEMENT SYSTEM

3-42

©

 200528

Control functions

XF105 series

Activation through the "RES" function

When "RES" is operated then at that moment the 

engine speed is increased to a programmed 

value in the electronic unit. When "RES" is 

operated again the engine speed is increased to 

the second programmed value in the electronic 

unit. After this, operating "RES" again will ensure 

that the engine speed decreases again to the first 

programmed engine speed value. 

Note:

The programmed engine speed and the 

acceleration to reach that speed can be changed 

using DAVIE XD. 

Activation through the "SET+" function

By operating "SET+" the engine speed will 

increase in steps of 25 rpm (programmable 

through DAVIE XD) each time it is activated or, if 

it is continuously operated, then the engine speed 

will increase evenly. The engine speed can then 

be reduced by operating "SET-". 

This functions only if the current speed is greater 

than or equal to the programmed minimum 

engine speed in the engine speed control.

Increasing or decreasing the engine speed

If the engine speed control is activated then the 

engine speed can be lowered by operating the 

"SET-". By operating "SET+" the engine speed is 

increased. The engine speeds that can be set are 

limited by a programmed minimum and maximum 

value in the electronic unit.

Note:

The programmed minimum and maximum engine 

speed for this control and the engine speed 

increase/decrease per operation of the "SET+" or 

"SET-" can be changed using DAVIE XD.

Steering wheel switches C916

K102021

1

3

5

2

4

6