DAF LF45, LF55 Series. Manual - part 39

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2-1

ECAS-2 customer parameters

ECAS-2

DAVIE XD diagnostics manual 

8

2. ECAS-2 CUSTOMER PARAMETERS

2.1 INTRODUCTION

Customer parameters
Customer parameters are the settings of an 

electronic system. The customer parameters 

permit adapting control functions of a system to 

the customer's particular wishes and/or needs 

within certain limits. The customer parameters 

are stored in a list in the memory of the electronic 

unit. Customer parameters can be modified using 

the programming feature of DAVIE XD. 

Programming using DAVIE XD is only possible if 

the logged-in user has been registered as a 

"Master Technician".

Note:

Erroneous settings of customer parameters may 

affect the action of control functions to such an 

extent that they function eratically or not at all. 

After modification of the settings the (modified) 

customer parameters must be stored in the 

electronic unit using the programming function in 

the customer parameter overview.

Customer parameter names and codes
Each customer parameter in a system has its 

own name and code. The following explanation of 

the customer parameters includes only the 

codes. The availability of a customer parameter 

in a system depends on the programmed 

software in the electronic unit. The programmed 

software depends on the vehicle configuration/

identity card data.

Standard values
Standard values, options and setting ranges may 

vary according to the software variants of 

DAVIE XD and the system. This is why they have 

not been included in the following explanation of 

the customer parameters.

ECAS-2

2-2

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ECAS-2 customer parameters

DAVIE XD diagnostics manual

8

2.2

E

X

P

LANATORY

 NOTES

 TO ECAS-2

 CUSTOME

R

 PARAME

TERS

ECA

S

 Cu

stom

er 

para

meter

 c

o

de

Exp

la

n

atio

n

D

e

p

en

de

nc

es:

Notes

Minimum 

va

lu

e to be

 

se

t:

Ma

ximum 

value

 to

 b

e 

set:

4

-0

2

T

his parameter makes it 

po

ssible

 to increa

se th

e 

tolera

nce fi

eld (hysteresis) 

of the

 sen

sor se

nsitivity.

Thi

s 

is a

 solu

tion 

if a 

cu

sto

m

e

r compla

ins a

bou

t unstabl

e 

re

gul

ati

on by ECAS-2. If a larg

er 

tol

erance

 fiel

d is 

ch

osen, th

e heig

ht 

cha

nge

 o

f th

e chassis must be

 

increase

d to al

low ECAS 

to make a correction.

4

-0

3

T

his parameter ena

ble

s a certain

 veh

icle slan

t to be 

redu

ced or increa

se

d. 

Redu

ctio

n ma

kes 

the

 veh

icle stand stra

igh

te

r (if 

the

 

ca

libra

tion is correct, i.e

. the

 sa

me hei

ght left and ri

ght).

Incre

ase will

 make the vehi

cle slant fu

rth

er, thereb

y 

enab

ling

 u

nstable

 h

orizontal

 setting

s 

to 

be 

preve

nte

d.

4

-0

5

T

his parameter rela

tes to 

th

e 

storag

e of 

faul

ts in the 

el

ectro

nic unit on the action of admitting ai

r to or 

exha

usting 

ai

r 

from the

 ai

r b

ello

ws.

A 

fa

ult is i

den

tifie

d if the

 hei

ght sen

sor read

ing

 doe

s not 

ch

ang

e d

uring

 the

 p

ro

grammed 

time 

whil

e i

t shou

ld 

have do

ne becau

se of 

the de

sired action

. Th

is 

time can

 

be lengthened with this 

pa

rameter. The 

ECAS system 

the

n waits long

er 

b

efore sto

ring the fa

ult becau

se 

the

 

heig

ht 

sen

sor 

re

adin

g has not ch

ang

ed.

4-

06

Th

is

 p

ar

am

et

er 

en

ab

le

s a

n

 in

cre

as

e o

r d

ec

re

as

e o

f t

he 

correction

 o

f th

e normal dri

vi

ng leve

l, 

wh

ich is 

ma

de 

whe

n th

e lifti

ng axle is raise

d.

An

 in

crease wil

l correct the no

rmal

 d

riving

 le

vel more 

when

 the 

axle

 is

 be

ing

 rai

sed. 

The 

vehicle may exceed 

the maximum permissible 

heig

ht. 

A de

cre

ase will

 co

rre

ct th

e normal dri

vi

ng leve

l less 

o

r 

not 

a

t all

 w

hen the axle

 is

 be

ing rai

se

d. 

The

 grou

nd 

cleara

nce ca

n be

come so

 small 

th

at the 3

rd 

axle, 

when

 rai

sed, re

gula

rly tou

ch

es 

a b

umpy 

road 

su

rf

a

ce

.

©

3-1

System inspection with DAVIE XD

ECAS-2

DAVIE XD diagnostics manual 

8

3. SYSTEM INSPECTION WITH DAVIE XD

3.1 CALIBRATING THE SENSORS

The sensors must be calibrated if the height and/

or pressure sensors of the ECAS unit are 

replaced.

Note:

Calibration should be carried out with due care to 

avoid physical injury and material damage. 

Additionally, the trailing or leading rear axle may 

be lowered automatically during these 

operations.

When the unit is programmed, the standard 

maximum chassis height of the rear axle and 

subsequently the desired maximum chassis 

height of the front axle are calibrated.

Explanation
1.

Place the gauges between the driven axle 

and the chassis.

2.

Lower the chassis using DAVIE XD until it 

rests on the gauges.

Note:

-

On the front axle the vertical rod is 

adjustable. The height setting of this 

vertical rod must be such that lever (1) is 

horizontal when the driving height is 

approx. 80 mm.

-

On high-volume vehicles the vertical rod 

on the rear axle is adjustable. The height 

setting of this vertical rod must be such 

that lever (1) is horizontal when the 

driving height is approx. 60 mm.

-

When the height sensors have been 

calibrated, the pressure sensor is 

subsequently calibrated automatically. 

All the air is exhausted from the bellows.

3.

Now bring the chassis to the desired 

maximum height at the front axle.

Note:

-

The maximum height of the chassis is 

limited by the mechanical stop of the 

shock absorber.

-

The highest level of standard sensor 

sensitivity setting must be a minimum of 

20 mm above the normal driving level; 

otherwise an error will occur in the 

height sensor values.

A.

Calibrating the sensors on replacing the 

ECAS unit

ECAS-2

3-2

©

System inspection with DAVIE XD

8

DAVIE XD diagnostics manual

If a height and/or pressure sensor has been 

replaced, the sensor must be recalibrated.

The maximum desired chassis height at the rear 

axle and the maximum desired chassis height at 

the front axle are calibrated.

1.

Place the gauges between the driven axle 

and the chassis.

2.

Lower the chassis using DAVIE XD until it 

rests on the gauges.

Note:

-

On the front axle the vertical rod is 

adjustable. The height setting of this 

vertical rod must be such that lever (1) is 

horizontal when the driving height is 

approx. 80 mm.

-

On high-volume vehicles the vertical rod 

on the rear axle is adjustable. The height 

setting of this vertical rod must be such 

that lever (1) is horizontal when the 

driving height is approx. 60 mm.

-

When the height sensors have been 

calibrated, the pressure sensor is 

subsequently calibrated automatically. 

All the air is exhausted from the bellows.

3.

Now bring the chassis to the desired 

maximum height at the front axle.

Then bring the chassis to the desired 

maximum height at the rear axle.

Note:

The maximum height of the chassis is limited 

by the mechanical stop of the shock 

absorber.

The shock absorber of the non-driven 3rd 

axle may reach its stop before the shock 

absorber of the driven axle.

The highest level of standard sensor 

sensitivity setting must be a minimum of 

20 mm above the normal driving level; 

otherwise an error will occur in the height 

sensor values.

B.

Calibrating the sensors when replacing 

the height and/or pressure sensor