Passport LX 4WD V6-3165cc 3.2L DOHC MFI (2001)
Electronic Throttle Actuator: Testing and Inspection
Electric Throttle Control (ETC) System Check
Circuit Description
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The powertrain control module (PCM) controls engine speed by adjusting the position of the throttle control valve (DC motor). The throttle motor
is a DC motor driven by one coil. The PCM applies current to the DC motor coil in PWM (%) to adjust the throttle valve into a passage in the
throttle body to allow air flow. This method allows highly accurate control of engine speed and quick response to changes in engine load.
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The acceleration position (AP1) sensor circuit provides a voltage signal relative to acceleration pedal angle.
The acceleration pedal angle will vary about 13 % at idle position to about 87 % at wide open throttle(WOT).
APS signal is used to determine which DC motor will adjust throttle position.
