If the engine is equipped with both cruise control and
an engine brake, the engine brake can operate auto-
matically while cruise control is activated. The maxi-
mum amount of braking is selected with the engine
brake control. When the vehicle returns to the set
cruise speed, the engine brake will turn off.
The engine brake will only operate when the accel-
erator and clutch pedals are fully released.
ABS has the ability to turn the engine brake off if
wheel slip is detected. The engine brake will auto-
matically turn back on once wheel slip is no longer
detected.
Engine Brake Operation
NOTICE
Do not allow the engine to exceed its governed
speed, or serious engine damage could result.
NOTE: Depending on the brake type, the engine
brake may be disabled when engine tempera-
ture falls below a set level.
The engine brake control is located on the right-hand
steering column lever. At the top position, the engine
brake is off, and at the three lower positions, the en-
gine brake is on and the intensity (low, medium,
high) increases with each step down. See
Fig. 15.5.
NOTE: The cruise control system and safety
systems may activate the engine brake regard-
less of the lever position.
NOTE: On vehicles equipped with a Detroit au-
tomated transmission, setting the engine brake
with the cruise control set activates Deceleration
Mode. Setting the cruise control while the en-
gine brake is on activates Descent Control
Mode. For information on these modes, see
"Cruise Control" in
Chapter 7.
f270164a02/17/2017
0
1
2
3
0. Off
1. Low
2. Medium
3. High
Fig. 15.5, Engine Brake Positions, Right-Hand Steering
Column Lever
Brake Systems
15.7
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