Holiday Navigator 2003 Owner's Manual page 401

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 not affected. 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.
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N A V I G A T O R 2 0 0 3
Chassis Information
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1 0 • 4 0 1