Pajero II Workshop Manual 1998 Supplement · FUEL · страница 46 из 104 · Открыть оригинал PDF ↗

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

OPERATION

The engine coolant temperature sensor
converts the engine coolant temperature into a
voltage and inputs it to the engine control unit,
which then controlsthefuel injection rate and
fast idle speed when the engine is cold based
on the input signal:

The 5 V power in the engine control unit is
supplied via a resistor in the unit to the engine
coolant temperature sensor. Through the
sensor which is a kind of resistor; it is earthed
in the engine control unit: The engine coolant
temperaturesensorresistorhassuch
characteristic that its resistance decreases as
the coolant temperature rises

sensor
The engine coolant temperature
terminal voltage increases or decreases as the
sensor resistance increases or decreases
Therefore,the engine coolant temperature
sensor terminal voltage changes with the
coolant temperature, decreasingas the
temperature rises:

TrOUBLESHOOTING HINTS

If the fast idle speed is inadequate or the engine
emitsdarksmoke duringenginewarmup
operation, the engine coolant temperature sensor
is often faulty:

Проверка

Using MUT-II

Таблица в оригинале

Распознанный текст таблицы — требует сверки с оригиналом

Function	Data display Item No	Check condition	Coolant tempe	rature %C Stan	dard value %C
Data reading	Sensor 21	Ignition switch: ON	At -20	~20
	temperature	engine operating or	At 0
			At 20	20
			At 40	40
ARNESS INSPE	CTION		At 80	80
A Harness sid connector	e QFUO112	Check for continuity of t Engine coolant temp connector: Disconnecte	he earth circuit: erature sensor d	OK cx	2 Repair the harness

HARNESS INSPECTION

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