Monaco DYNASTY 2006 User Manual page 320

ATC System:
The ATC system improves traction on slippery or unstable road surfaces by limiting excessive drive wheel slip.
This is accomplished two ways, limiting engine torque to the drive wheel or engaging a brake to the spinning
drive wheel. During normal operation engine torque is unaffected. The ATC system works in conjunction with
the ABS Electronic Control Unit. The ECU monitors tone ring speed of the drive wheel in relation to the other
wheels. If a speed differential occurs in the drive wheel, the ECU enters Automatic Traction Control mode.
During an ATC event, the ECU will automatically react to optimize traction and safety if the motorhome
encounters a slippery road surface. Engine torque is normally reduced to limit drive wheel slip.
NOTE:
The ATC system is always active.
ATC reacts to drive wheel slip by:
• Reducing engine torque to the drive wheel if road speed is above 25 mph.
• Reducing engine torque and activating drive axle brake controls if road speed is below 25 mph. If the
brake control activates, it remains active regardless of road speed.
ATC Switch:
Activating the ATC switch reduces ECU control over engine torque. Momentarily pressing
the ATC switch allows the ECU to increase the amount of engine torque applied to the drive
wheel in an ATC event. The amount of engine torque applied to the drive wheel will vary with
the amount of drive wheel slip versus road speed. In an ATC event, the ECU remains active
regardless of road speed or switch position. The indicator light fl ashes slowly when the ATC
switch is activated.
ATC Indicator Light:
During normal operation, the ATC indicator light will illuminate steady when the ignition key
is turned ON. If an ATC event occurs, the indicator light will fl ash quickly. The indicator light
will fl ash slowly if the ATC switch is activated.
CAUTION:
Normally the switch should remain inactive. During an ATC event (drive wheel slip) the
ECU will automatically optimize drive wheel traction in most situations. Activating the
switch during periods of wheel slip can increase torque to the spinning drive wheel. Drive
train damage can occur if the spinning drive wheel should suddenly regain traction. If the
motorhome is stuck it is advised to call a professional towing company to limit the possibility
of body and drive train damage.
320 • SECTION 10 — CHASSIS INFORMATION
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ATC Switch and
Indicator Light
DYNASTY 2006