Traction Control Systems: Description

WARNING: Vehicles are equipped with air bag supplemental restraint system. Before attempting ANY repairs involving steering column, instrument panel or related components, see SERVICE PRECAUTIONS and DISABLING & ACTIVATING AIR BAG SYSTEM in 1995 ACURA AIR BAG RESTRAINT SYSTEM or 1996 ACURA - AIR BAG RESTRAINT SYSTEM article.

CAUTION: When battery is disconnected, vehicle computer and memory systems may lose memory data. Driveability problems may exist until computer systems have completed a relearn cycle.

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

The version of TCS has a lateral acceleration (Lg) sensor and a deceleration control function to improve traction control during acceleration and deceleration while cornering. When downshifting quickly to a very low gear on a slippery surface, the driving wheels tend to slip because of engine braking, resulting in lower directional stability. To counteract this, the deceleration control function controls engine braking with the TCS control unit.

The TCS control unit gets signals about the vehicles 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 cornering). For any given driving situation, the control unit will determine the amount of wheel spin best suited to the driver's needs and, if necessary, will then signal the throttle actuator and Engine Control Module (ECM) to reduce engine power.

The system is automatically "ready" whenever the engine is started, but can be manually canceled with the TCS switch. However, once activated, the system cannot be canceled until it is once again in the ready state.