Ford Explorer 2004, Техническое учебное пособие, Страница: 73 / 134

LESSON 3: POWERTRAIN
Electronic Throttle Body Motor
Item Description Item Description
1 Throttle motor cover 3 Throttle return spring
2 Throttle drive gear 4 Reduction gear
The new electronic throttle body controls throttle plate angle to perform several functions.
•
Functions include:
– Idle speed control.
– Cruise control.
•
Limp-home spring, which opens the throttle eight degrees, if the PCM loses power.
NOTE: The breakaway, factory-set idle, speed screw on the ETB is not adjustable.
The PCM provides an output based on accelerator pedal position, which drives a DC motor via a reduction gear.
•
The PCM positions the throttle plate at the requested angle.
•
Two throttle position sensors monitor throttle plate movement to provide position information feedback and as
a rationality check.
2004 Explorer/Mountaineer New Model Technician Training 12-AUG-03 3-23