How does advancetrac on the 2005 Ford freestar work? gas mileage?

How exactly does the advancetrac traction control on the 2005 Freestar work?



How miles per gallon does the 2005 ford freestar get? v6 engine.How does advancetrac on the 2005 Ford freestar work? gas mileage?Principles of Operation for 2005 Freestar



Traction Control with Stability Assist



With the ignition switch in the START or RUN positions, the stability assist module functions similarly to a conventional ABS module by monitoring and comparing the rotational speed of each wheel. The wheel speed sensors electrically sense each tooth of the anti-lock sensor ring as they pass through the sensor magnetic field. When the stability assist module detects an impending wheel lock, wheel spin or vehicle motion that is inconsistent with the driver commands, it modulates brake pressure to the appropriate brake caliper(s). The stability assist module triggers the hydraulic control unit (HCU) to open and close the appropriate solenoid valves. Once the affected wheel(s) return to the desired speed, the stability assist module returns the solenoid valves to their normal position, and normal base brake operation is restored.



The stability assist module communicates with the powertrain control module (PCM) to assist with traction control. At speeds under 40 km/h (25 mph), when drive wheels lose traction and begin to spin, the stability assist module requests the PCM to reduce engine torque, while simultaneously applying and releasing the appropriate brake caliper(s) to maintain traction. The PCM accomplishes this by minor incremental timing changes and fewer fuel injector pulses until the stability assist module ends the request. The request ends when the driven wheel speed returns to normal. After the vehicle speed exceeds 40 km/h (25 mph), traction control is accomplished only through the PCM engine torque control.



The stability assist system constantly monitors vehicle motion relative to the intended course. This is done by using sensors to compare the steering input and brake application with that of the actual vehicle motion. The system does not activate when the vehicle is traveling in reverse; however, ABS and traction control continue to function as usual.



The stability assist/traction control switch allows the driver to control use of the stability assist system. This is independent of the ABS function, which cannot be switched off by the driver. The stability assist system status is indicated by a stability assist warning light in the stability assist/traction control switch. An illuminated stability assist/traction control switch indicates that the stability assist system is switched off. In the message center, ADVANCE TRAC OFF is displayed. If a failure is detected somewhere in the stability assist system which affects either the yaw control or traction control functions, the stability assist indicator illuminates. The anti-lock brake function continues to work as designed unless the yellow anti-lock brake warning indicator is also illuminated. The normal brake function always occurs, unless the red brake warning indicator is illuminated.



When stability assist activates, any of the following may occur:



a rumble or grinding sound.

a small deceleration or a reduction in the acceleration of the vehicle.

the stability assist indicator flashes.

if the brake pedal is applied, a vibration is felt in the pedal.

if the event is severe and the brake pedal is not applied, the brake pedal will move to apply greater brake forces. A whooshing sound can also be heard from under the instrument panel when an event is severe.

There may be a slight movement of the brake pedal during the system self-test. The brake pedal moves when an active test of the brake booster is run. During this test, a small amount of pressure is generated at the master cylinder, but no pressure is generated in the brake calipers. This test occurs above 48 km/h (30 mph) after the vehicle has been running approximately 8 minutes. The test is only run if the vehicle is stable, the brake pedal is not applied, and the accelerator pedal is slightly pressed. If the brake system is not bled correctly, the brake pedal movement can become more significant.



Regarding fuel consumption, there are too many variables to be able to provide any definite answers. But on average, a Freestar should realistically achieve anywhere between 16 to 28 mpg under "normal" operating conditions.



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