Ford Fusion: Acceleration Control / Acceleration Control - Overview. Description and Operation
Overview
The acceleration controls consist of the accelerator pedal and sensor assembly.
The throttle is controlled by an APP sensor on the accelerator pedal assembly. The APP sensor sends a signal to the PCM in response to throttle pedal movements initiated by the driver. The PCM sends a signal to the electronic throttle control which increases and decreases throttle position.
The
engine management system electronically operates the throttle of the
engine in response to throttle pedal movements initiated by the driver.
In the event of a system failure, the engine management system provides a
"limp home" mode which allows the car to be driven with limited
performance.
Removal
NOTE:
Removal steps in this procedure may contain installation details.
NOTE:
To prevent setting Diagnostic Trouble Codes (DTCs), make
sure the ignition switch is in the OFF position prior to disconnecting
the accelerator pedal electrical connector...
Other information:
Check
NOTE:
No factory-equipped vehicle should have more than a 25 mA
(0.025 amp) – 50 mA (0.050) draw depending on the vehicle's accessories.
Check for current drains on the battery in excess of 25 mA (0.025 amp) –
50 mA (0.050) with all the electrical accessories off and the vehicle
at rest for at least 40 minutes...
Inspection
Cratering - fatigue failure
Spot glazing - incorrect seating
Scratching - dirty engine oil
Base exposed - poor lubrication
Both edges worn - journal damaged
One edge worn - journal tapered or bearing not seated
..