Technician A says electronically controlled transmissions use Electronic Pressure Control (EPC) solenoids to control line pressure. Technician B says when looking at electronic pressure control solenoids with a digital storage oscilloscope (DSO); the voltage pattern would be a sine wave. Who is correct?
A) Technician A
B) Technician B
C) Both A and B
D) Neither A nor B

Question

Quizplus · Accepted Answer

Technician A is correct because electronically controlled transmissions do use EPC solenoids to control line pressure. Technician B is incorrect because the voltage pattern for EPC solenoids is typically a pulse-width modulated (PWM) signal, not a sine wave.

Technician a Says Electronically Controlled Transmissions Use Electronic Pressure Control