Pajero II Workshop Manual 1991 · FUEL · страница 164 из 339 · Открыть оригинал PDF ↗

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INJECTORS

OPERATION

The injectors are electromagnetic-valve-equipped
injection nozzles that function to inject fuel based
upon injection signals from the engine control
unit:

Because the surface area of the injection ports iS
fixedandbecausethepressureofthefuel
relative to the pressure within the manifold is also
regulates toa fixed pressure,the amount of fuel
injection by injectors is determined by the length

of time that the needle valve is open, Or, in other
words, by the length of time of current flow to
the solenoid coil.

Battery power supply is supplied, by way of the
control relay, to the injectorsWhen the engine
control unit switches ON thepower transistor
within the unit and current flows to the solenoid
coil, the injectors open and fuel is injected.

TROUBLESHOOTING HINTS

Hint 1: If there isa problem with starting while the
engine is warm, perform the combustion test
and check for leakage of the injectors

Hint 2: If the engine can't be started, and the injectors
are not activated during cranking; the cause
is probably a malfunction such as described
below, not with the injectors:

(1) Malfunction of the circuit for supply of
power to the engine control unit; or of the
earth circuit

21 Malfunction of the control relay:

3) Malfunctionofthecrank-anglesensor
and/or the top dead center sensor,

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