MANUALS · FUEL [13] · страница 133 из 340 · 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 intoa voltage
and inputs it to the engine control unit; which
then controls the fuel injection rate and fast idle
speedwhenthe engine is coldbasedonthe
input signal.

The5power inthe engine control unit is
supplied via a resistor in the unit to the engine
coolant temperature sensor: Through the sensor
rness side ch is a kind of resistor, it is earthed in the
nnectorengine
control unitTheengine coolant tempera-
ture sensor resistor has such' characteristic that
its resistance decreases as the coolant tempera-
ture rises:

The engine coolant temperature sensor terminal
voltageincreasesordecreasesasthesensor
resistance increases or decreases: Therefore, the
engine coolant temperature sensor terminal volt-
age changes with the coolant temperature, de-
creasing as the temperature rises

TROUBLESHOOTING HINTS

If the fast idle speed is inadequate or the engine
emits dark smoke during engine warm up operation
the engine coolant temperature sensor is often faulty:

Проверка

Using MUT-II

Таблица в оригинале

Распознанный текст таблицы — требует сверки с оригиналом

Function	Item No	Data display	Check condition	Coolant temperature *	C (PF	) Standard value *€ (PF)
Data reading	21	Sensor	Ignition switch: ON or	At-20 (-4)		~20 (-4)
		temperature	engine operating	At 0 (32)		0 (32)
				At 20 (68)		20 (68)
				At 40 (104)		40 (104)
				At 80 (176)		80 (176)

HARNESS INSPECTION

Check for continuity of the earth

Оригинальная страница руководства