Page 52
DESCRIPTION AND OPERATION
Deactivating the cruise control function does not
disable the engine brake.
The J-Tech™ engine brake may be activated or
deactivated by other vehicle systems such as
ABS and Headway control systems. Refer to the
literature concerning these systems for additional
information.
53
Figure 53 — J-Tech™ Brake Arrangement
Use of the J-Tech™ engine brake is controlled by
a dash-mounted switch that has two power
positions: a LOW position to apply approximately
one-half (three cylinders) of the engine brake
retarding capability, and a HIGH position to apply
full retarding power (all six cylinders). The choice
of LOW or HIGH operation depends on the
driving situation, vehicle load and downhill
percent grade. When the switch is in the OFF
position, the engine brake is deactivated.
54
Figure 54 — Dash-Mounted Engine Brake Switch
5-111.bk Page 52 Monday, July 10, 2006 2:26 PM
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