MANUALS · FUEL [13] · страница 70 из 340 · Открыть оригинал PDF ↗

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Standard wave pattern

Observation conditions

Time
ZFU1204

Wave pattern observation points

Check that the standard wave pattern appears when the stepper motor is operating:

(Point A}:Presence or absence of induced electromotive force from the motor turning: (Refer to the
abnormal wave pattern )

Таблица в оригинале

Распознанный текст таблицы — требует сверки с оригиналом

Contrast with standard wave pattern	Probable cause
Induced electromotive force does not appear or is extremely small,	Motor IS malfunctioning
Height of coil reverse electromotive force (Point B):
Contrast with standard wave pattern	Probable cause
Coil reverse electromotive force does not appear or is extremely small	Short in the coil

Abnormal wave pattern
Cause of problem

Motor is malfunctioning: (Motor is not operating:)
Wave pattern characteristics

Induced electromotive force from the motor turning does
not appear,

HARNESS INSPECTION

Measure the power supply voltage
of idle speed control servo.
Idle speed control servo
connector: Disconnected
Ignition switch: ON
Voltage (V)
SV

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