Двигатели Scania четвёртой серии. Руководство — часть 233

03:14-01

3

XPI fuel system

Troubleshooting

A number of troubleshooting trees with their

associated descriptions are provided below.

IMPORTANT! Always wash the engine before

starting work on the fuel system.

Read the troubleshooting diagrams from left to

right as illustrated.

Troubleshooting

4

03:14-01

S -

St

ar

t-u

p ch

ec

k

S -

St

ar

t-

up

c

h

ec

k

C

arry out troubleshootin

g

as desc

ribed in S

D

P3

T

h

ere

are f

aul

t c

ode

s

S-

a Check f

or any f

ault

c

odes using

SD

P3.

War

m

u

p t

he

vehi

cl

e. S

tart

aga

in

f

rom

S-

a.

T

he

re ar

e n

o fau

lt

code

s

Yes

C

an t

he

vehicle be star

te

d?

R

ec

tif

y the

f

aul

t. St

ar

t

again fr

om

S-

a.

No

T

h

er

e is n

o f

ue

l or

the fuel

co

nt

ains

p

re

ci

pit

at

ed par

af

fin

w

ax

or m

ic

roorganisms.

C

hec

k tha

t the

re i

s some

fue

l i

n the

ta

nk and that it i

s does not conta

in

prec

ip

itate

d pa

raf

fin wax. Chec

k

whet

her

the

re a

re a

ny

m

ic

roorganisms?

Th

er

e is fuel or the f

ue

l is OK

C

ontinue fr

om

tr

oubl

es

hoot

ing tree

S-

b.

S - Troubleshooting tree

03:14-01

5

S -

St

ar

t-

up

c

h

ec

k

Repa

ir

th

e leak. Start aga

in from

S-

a.

Ye

s,

t

he

re ar

e leaks

S-

b

Pum

p wit

h t

he

ha

nd

pump

unti

l r

esist

an

ce

buil

ds up.

C

hec

k for e

xte

rnal

fue

l l

eaks at

th

e fe

ed pum

p, fi

lte

r

housing and fue

l p

ipe

s.

No, ther

e are

n

o le

ak

s or it is not

po

ss

ibl

e t

o bu

ild

up

p

res

su

re w

it

h

th

e h

and

pum

p

Chec

k t

he

lo

w

pressure

section.

Conti

nue

from troubleshooting

tr

ee

L-

a.

S - Troubleshooting tree

6

03:14-01

L -

Lo

w

pr

es

su

re

c

heck

L

- L

ow p

ressu

re c

he

ck

Conti

nue

from troubleshooti

ng tre

e

S-

a.

Ai

r-f

ree

fu

el

come

s out

R

enew the f

uel filt

er

and ble

ed the

fuel system, see de

scription

L2

.

D

ur

in

g one

ch

ec

k n

o fue

l come

s

out

No fuel come

s ou

t

Chec

k t

he

su

ct

ion stra

in

er

in the

ta

nk.

L-

a Chec

k t

he

fee

d pum

p, se

e

de

scriptio

n

L1

.

Conti

nue

from

troubleshooting t

ree

S-

a.

...of one pu

m

p

Du

ri

ng

both

or

on

e of the c

he

ck

s

fu

el

c

omes ou

t

C

ontinue f

rom

troubleshooti

ng tre

e

L-

b

.

...of both th

e p

u

mps

Conti

nue

from

troubleshooting t

ree

L-c

.

L - Troubleshooting tree