Traction Control System
The TCS works on the same speed-
sensing principles as the Anti-lock
brake system. The TCS monitors the
speed of the wheels during accelera-
tion. If one drive wheel starts to spin
faster than the other, or both drive
wheels spin faster than the front
wheels,the TCS reduces engine
power to minimize wheelspin.
The TCS uses the same four wheel
speed sensor assemblies used by the
Anti-lock brake system. An addi-
tional sensor measures steering-
wheel-angle. This measures how far
the front wheels are turned, if at all.
The TCS control unit receives the
signals from these sensors.
When the TCS senses wheelspin, the
control unit determines how much
slippage to allow based on the
difference in wheel speeds and the
steering angle. It then controls the
throttle and signals the engine's
ECU to regulate ignition timing and
fuel flow. This reduces available
engine power.
The control unit monitors the TCS
circuitry while driving. If it senses a
problem, the TCS indicator light on
the instrument panel goes on. The
system will then be turned off.
Technical Information