Technician A says dynamic rear proportioning replaces the old mechanical proportioning valves with ABS action to prevent rear wheel lock up during heavy braking. Technician B says an enhanced traction system can control wheel slippage in some cases by simply reducing the output torque of the engine by reducing engine timing, cutting, cylinders, reducing the throttle opening, or reducing fuel delivery. Who is correct?

Question

Quizplus · Accepted Answer

Both statements are correct. Dynamic rear proportioning is a feature of ABS systems that modulates brake pressure to the rear wheels to prevent rear lock up during heavy braking. An enhanced traction system may use various methods to control wheel slippage, including reducing engine torque by adjusting engine timing, cutting cylinders, reducing throttle opening, and reducing fuel delivery.

Technician a Says Dynamic Rear Proportioning Replaces the Old Mechanical