Pajero II Workshop Manual 1991 · FUEL · страница 40 из 339 · Открыть оригинал PDF ↗
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Датчик температуры охлаждающей жидкости
OPERATION
The engine coolant temperature sensor functions
to convert the barometric pressure to voltage, and
to input that voltage (as signals) to the engine
control unit The engine control unit, based upon
those signals, regulates the amount of fuel injec-
tion and the fast-idling speed when the engine is
cold:
The5vpower supply withinthe engine con-
trol unit is supplied, byway of the resistance
withintheunit,totheenginecoolant
temperature sensor; it passes through the en-
ginecoolanttemperaturesensor,which is
type of resistor,and is earthed at the engine
controlunit;Notethatthe resistanceofthe
engine coolant temperature sensor decreases
when the temperature of the engine coolant
increases_
The engine coolant temperature sensor terminal
voltage becomes higher when the resistace of the
engine coolant temperature sensor increases, and
becomes lower when the resistance decreases
Consequently,theenginecoolanttemperature
sensor terminal voltage varies in accordance with
the temperature of the engine coolant, becoming
lower when the temperature of the engine coolant
increases
TROUBLESHOOTING HINTS
If, during engine warm-up, the fast-idling speed is not
corrector black smoke is emitted,the problem is
usually a malfunction of the coolant temperature sen-
sor .
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