Pajero II Workshop Manual 1991 · FUEL · страница 60 из 339 · Открыть оригинал PDF ↗
Текст распознан со скана. Числа и обозначения можно сверить с оригиналом ниже.
Датчик кислорода
01L0838
TROUBLESHOOTINGHINTS
OPERATION
The oxygen sensor functions to detect the concen-
tration of oxygen in the exhaust gas; it converts
thosedatato voltage, and inputs the resulting
signals to the engine control unit.
Hint 1:
The exhaust gas purification performance will worsen
if there is a malfunction of the oxygen sensor.
Hint 2:
theairlfuelmixtureratioisricherthanthe
theoretical air/fuel mixture ratio (i.e.if the concen-
tration of oxygen in the exhaust gas is sparse),
voltage of approximately 1V is output; if the airlfuel
mixture ratio in leaner than the theoretical air/fuel
mixture ratio (i.e:if the concentration is dense),
voltage of approximately OV is output.
If the oxygen sensor output voltage deviates from the
standard value even though the results of the checking
of the oxygen sensor are normal, the cause is probably
a malfunction of a component related to air/fuel mix-
ture ratio control:
[Examples]
(1) Malfunction of an injector
The engine control unit, based upon those signals_
regulates the amount of fuel injection so that the
air/fuel mixture ratio becomes the theoretical air-
Ifuel mixture ratio_
(21Air leakage into the intake manifold from a leaking
gasket:
(3)Malfunction of the air-flow sensor,the intake air
temperature sensor, the barometric-pressure sen-
sor, or the engine coolant temperature sensor;
Battery power supply is applied,by way of the
control relay, to the oxygen sensor heater.As
result; the sensor element is heated by the heater,
re-
so that the oxygen sensor shows excellent
sponse even if the temperature of the exhaust gas
is low.
PWJE9086
Mitsubishi Motors CorporationFeb1991
Оригинальная страница руководства
