Mirage Sedan LS L4-1834cc 1.8L SOHC MFI (1999)
Point A: Presence or absence of induced electromotive force from the motor turning. (Refer to the abnormal wave pattern.)
Point B: Height of coil reverse electromotive force
Examples of Abnormal Wave Pattern
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Example 1
Cause of problem
Motor is malfunctioning. (Motor is not operating.)
Wave pattern characteristics
Induced electromotive force from the motor turning does not appear.
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Example 2
Cause of problem
Open circuit in the line between the IAC motor and the ECM.
Wave pattern characteristics
Current is not supplied to the motor coil on the open circuit side. voltage does not drop to 0 V.) Furthermore, the induced electromotive force
waveform at the normal side is slightly different from the normal waveform.
Resistance Test
IDLE AIR CONTROL MOTOR (STEPPER MOTOR) CHECK