Pajero II Workshop Manual 1998 Supplement · FUEL · страница 59 из 104 · Открыть оригинал PDF ↗

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

OPERATION

The crank angle sensor senses the crank
angle (piston position) of each cylinder,
converts it into & pulse signal and inputs it to
the engine control unit,which then computes
theenginespeedandcontrols the fuel
injection timing and ignition timing basedon
the input signal:

Power to the crank angle sensor is supplied
from the controlrelayand is earthed to the
body: The crank angle sensor generates
pulse signal as it repeatedly connects and
disconnects between5 V voltage supplied
from the engine control unit and earth.

TROUBLESHOOTING HINTS

Hint 1: If unexpected shocks are felt during driving
or the engine stalls suddenly during idling,
shake the crank angle sensor harness.
this causes the engine to stall, poor contact
of the sensor connector is suspected.

Hint 2: If the crank angle sensor outputspulse
signal when the ignition switch is turned ON
(with the engine not running) , a faulty crank
angle sensor or engine control unit is
suspected

Hint 3: If the tachometer reads 0 rlmin when the
engine that has failed to start is cranked,
faulty crank angle sensor or broken timing
belt is suspected.

Hint 4: If the tachometer reads 0 rlmin when the
engine that has failed to start is cranked,
the primary current of the ignition coil is not
turned on and off. Therefore, troubles in the
ignition circuit and ignition coil orfaulty
power transistor is suspected.

Hint 5: If the engine can be run at idle even though
the crank angle sensor reading is out of
specification, troubles are often in other
than the crank angle sensor:
[Examples]

(1) Faulty engine coolant temperature
sensor

2)Faulty idle speed control servo

3) Poorly adjusted reference idle speed

Проверка

Using MUT-II

Таблица в оригинале

Распознанный текст таблицы — требует сверки с оригиналом

Function	Item No_	Data display	Check condition	Check content	Normal state
Data reading	22	Cranking speed	Engine cranking Tachometer con- nected	Compare cranking speed and MUT-II reading	Indicated speed to agree

NOTE

(1)The tachometer indicatesa third of the actual engine speed. Therefore, 3 times the tachometer
indication is the actual engine speed.

(2) When the tachometer is set to the 2-cylinder range, it indicates actual engine speed.

Таблица в оригинале

Распознанный текст таблицы — требует сверки с оригиналом

Function	Item No_	Data display	Check condition	Engine coolant tempera- ture %C	Standard value rlmin
Data reading	22	Idle speed	Engine: Running	At 20	1275 1475
			at idle Idle position	At 0	1425 1225
			switch: ON	At 20	1100 1300
				At 40	950 _ 1150
				At 80	600 800

Wavetorm inspection with analyzer

Refer to cam position sensor section (P.13-54.)

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