158 OPERATION Enhanced Stability Program Enhanced Stability Program (ESP) is an optional system that uses existing ABS and ATC components with the addition of electronic sensors and brake valves. The system will automatically apply and release individual brakes to improve vehicle control when extreme conditions are detected. In the event a pending rollover situation is sensed, the system applies all brakes to reduce vehicle speed to lessen the possibility of rollover. Please refer to the applicable vendor manual for more information.
Precautions When Installing Electrical Equipment Connecting electrically powered or electrically controlled equipment to the vehicle may cause interference with other vehicle components (e.g., the ABS system). The amount of interference will depend on the operating frequency of any new signals and the degree to which transient signals are coupled into the vehicle system. Note: Whenever new electrical equipment is installed, it is the obligation of the installer to ensure that the new equipment does not interfere with the proper operation of all other electrical systems on the vehicle. If new electrical equipment is installed, a vehicle checkout procedure should be performed. 1. Perform the checkout procedure under the following conditions: • Engine running • Brake system air pressure in operating range • Vehicle stationary • Brake pedal fully depressed 2. Operate the new equipment under all starting, running and shutdown conditions. 3. Listen for signs of air exhausting from ABS modulator valves (which is an indication of an interference condition).
