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ENGINE SHUTDOWN
Before shutting down an engine that has reached operating
temperature, idle the engine for 2 to 3 minutes, allowing the
hottest engine components to dissipate some of their internal
heat.
Idling is recommended, if an engine has been running at
maximum horsepower.
HD-OBD OVERVIEW
The HD-OBD system uses many individual pre-programmed
"monitors" to ensure the vehicle is meeting emissions standards.
An HD-OBD monitor is a strategy to evaluate the performance
of an emissions related system or component. All monitors
are designed for execution in a prescribed frequency; some
monitors run continuously, while some run a specific ratio
against the number of drive cycles.
The operator will be alerted to emissions or other system
problems when the Malfunction Indicator Lamp (MIL) illuminates.
When the MIL illuminates, bring the vehicle in for service at
the next available opportunity. The HD-OBD system does not
change the way the vehicle should be driven, the recommended
driving style, or the way you use the vehicle.
SECTION 4 – ENGINE OPERATION
RADIATOR SHUTTLE ENABLE (RSE)
RSE is an optional feature that provides a signal to open or close
the radiator shutters. Closing the shutters will keep the engine
warm during cold weather operation.
ROAD SPEED LIMITING (RSL)
RSL is an optional feature that limits the top vehicle speed the
ECM allows. RSL is set to one of the following two positions:
•
•
To have the RSL set, changed, or turned off, see an authorized
service provider.
ROAD OPERATION
Correct road operation of your vehicle will provide the following:
•
•
•
OFF
Vehicle speed to be determined by customer, up to a
maximum of 204 kph (127 mph).
Satisfactory engine performance
Maximum fuel economy
Long service life
Page 55
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