freightliner M2 Plus 2023 Manual page 69

04/18/2016
Fig. 4.13, Regen Inhibit Switch
Axle Switches
Some vehicles are equipped with an interaxle
differential lock switch and/or a switch for each
driver-controlled differential lock (DCDL). See
Fig. 4.14.
For more information about differential locks and
using them for traction control, see
Axles.
1
LOCK
INTR
AXLE
UNLOCK
LOCK
DIFF
LOCK
UNLOCK
4
09/15/2016
1. Interaxle Lock Switch
2. Forward Drive Axle Differential Lock Switch
3. Rear Drive Axle Differential Lock Switch
4. Differential Lock Switch, 6X4
5. Differential Lock Switch, 4X2
6. Lift Axle Switch
Fig. 4.14, Axle Switches
REGEN
OFF
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Chapter 16
2 3
LOCK LOCK
FWD REAR
DIFF DIFF
UNLOCK UNLOCK
LOCK LOWER
DIFF LIFT
LOCK AXLE
UNLOCK RAISE
5 6
Engine Brake Switches
NOTE: See
detailed information about engine brake
operation.
Whenever vehicle braking is required on good road
conditions, the engine brake may be used in
conjunction with the service brakes. There is no time
limit for operation of the engine brake. However, an
engine brake does not provide the precise control of,
and is not a substitute for, service brakes.
The engine brake control is located on the right-hand
steering-column-mounted lever. At the top position,
the engine brake is off, and at the three lower
positions, the brake is on and the intensity (low,
medium, high) increases with each step down. See
Fig. 4.15
NOTE: Cruise control and safety systems may
activate the engine brake regardless of the lever
position.
Drive
02/17/2017
0. Off
1. Low
Fig. 4.15, Engine Brake Positions
Engine Fan Switch
The engine cooling fan can be turned on by the
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engine fan switch.
To turn the engine fan on, press the upper half of the
switch. The fan will continue to operate for a set
amount of time and then turn off unless the coolant
temperature is high enough to continue fan
operation. To turn the fan off before the set time
period ends, press the lower half of the switch. See
Fig. 4.16.
Driver Controls
Chapter 11 Brake Systems, for
2. Medium
3. High
0
1
2
3
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4.8