FREE REPAIR MANUALS & LABOR GUIDES 1982-2013 Vehicles
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ABS (Anti-Lock Brake System)





SYSTEM COMPONENT

The Anti-Lock Brake System (ABS) controls the hydraulic brake pressure of all four gear wheels during sudden braking and braking on hazardous road surfaces, preventing the wheels from locking. This ABS provides the following benefits.
1. Enables steering around obstacles with a greater degree of certainty even during panic braking.
2. Enables stopping during panic braking while allowing stability and steerability to a minimum, even on curves.

In case a malfunction occurs, a diagnosis function and fail-safe system have been included for serviceability.

NOTE: The feeling of vibration in the pedal under emergency braking is not evidence of a system malfunction.

The traction control is a variable system designed to enhance traction during acceleration. It does so by determining the optimum amount of wheel spin for any given driving situation, then suppressing surplus engine power accordingly.

The integrated control unit (HECU) gets signals about the vehicle's speed, direction and road conditions from sensors at the wheels and the steering column. Based on these signals, the control unit will determine the optimum amount of wheel spin. Because the system is variable, the control unit may determine, depending on the driving conditions, that some wheel spin is beneficial (thus enhancing straight-line acceleration), or that no wheel spin is beneficial (thus enhancing cornering). For any given driving situation, the control unit will determine the amount of wheel spin best suited to the driver's needs.

The system is automatically ready whenever the engine is started, but can be manually canceled with the TCS switch.

However, once actuated, the system cannot be canceled until it is once again in the ready state.





DIAGRAM OF INPUT/OUTPUT FOR HECU