Traction Control Indicator Lamp: Description and Operation
TRACTION CONTROL FUNCTION LAMPThe traction control function lamp illuminates during a traction control cycle, displaying either TRAC or TRAC ON.
The traction control system is enabled at each ignition cycle. It may be turned off by depressing the traction control switch button. The traction control function lamp (TRAC OFF) illuminates immediately upon depressing the button.
If the CAB calculates that the brake temperatures are high, the traction control system becomes inoperative until a time-out period has elapsed. During this "thermo-protection mode," the traction control function lamp illuminates TRAC OFF; note that no trouble code is registered.