Operation Manual

before the engine will shut off. The ignition switch
position will remain in the ACC position until the
vehicle is stopped and the button is pressed twice to
the OFF position.
Turbocharger “Cool Down”
NOTE: Letting the engine idle after extended opera-
tion allows the turbine housing to cool to normal
operating temperature.
The following chart should be used as a guide in
determining the amount of engine idle time required to
sufficiently cool down the turbocharger before shut
down, depending upon the type of driving and the
amount of cargo.
Turbocharger "Cool Down" Chart
Driving Conditions Load Turbocharger Temperature Idle Time (in minutes)
Before Shut Down
Stop & Go Empty Cool Less than 1
Stop & Go Medium Warm 1
Highway Speeds Medium Warm 2
City Traffic Maximum Gross
Combination Weight Rating
Warm
3
Highway Speeds Maximum Gross
Combination Weight Rating
Warm 4
Uphill Grade Maximum Gross
Combination Weight Rating
Hot 5
199
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