Pajero II Workshop Manual 1991 · FUEL · страница 9 из 339 · Открыть оригинал PDF ↗

Текст распознан со скана. Числа и обозначения можно сверить с оригиналом ниже.

Диагностика и устранение неисправностей

Checking trouble symptom

Estimating causes of trouble ad
setting check item

Checking individual MPI system
components

Re-examining causes of trouble ad
checking ad repairing

END

EXPLANATION OF TROUBLESHOOTING PROCE- DURES

The effective troubleshooting procedures for troubles of the
MPI system are explained in the following
Checking trouble symptom

Reproduce the problem symptom and check the con-
tents of the trouble ad the conditions under which
thesymptomoccures(enginecondition, operating
state, etc ).

Reading self-diagnosis code

Read the self-diagnosis code and whena fault code
is output,correctthe fault referring to DIAGNOSIS
CHART

3_Estimating causes of trouble and setting check item
Referring to CHECKCHART CLASSIFIEDBYPROB-
LEMSYMPTOMSdeterminethecheckitemsand
procedures to be followed.

Checking engine control unit input and output signals
Using a multi-use tester or analyzer,check the input

and output signals of the engine control unit.
If the input and output signals are normal,the sensor
inputlactuatorcontrolisjudgedasnormal.Then
check the input and output signals of the next check
item.

Checking harnesses of MPI system components
If the input and output signals of the engine control
unit are not normal, check the body harnesses of the
MPI system components and repair as necessary
After repair, check the input and output signals of the
engine control unitagain.If they are normal thistime ,
check the input ad output signals of the next check
item:

Checking individual MPI system components
If the body harnesses arenormal but the input and
controlunitareabnor-
output signalsof the engine
mal,check theMPIsystemcomponents individually
and repair or replace as necessary:

out-
After repair or replacement,check the input ad
put signalsofthe engine control unitagain.If they
are normal this time,check the input and output sig-
nals of the next check item.

Re-examining causes of trouble and checking ad repair-
ing

If the harness check ad individual component check
have resulted normal but the input ad output signals
ofthe engine controlunit areabnormal, re-examine
the causes of trouble referring to the troubleshooting
hints_Then, check ad repair including other groups
8_Confirming completion of repair ad preventingreoccur-
rence

Try to reproduce the problem symptom to make sure
that the symptom will not occur again:
Remove the true cause of the trouble to prevent its
reoccurrence

Оригинальная страница руководства