N: Sleeper Temperature Sensor; O: Outside Air Temperature Sensor - freightliner Park Smart Technical Information

of heated coolant through the heated core for internal bunk heat as well as
engine heat.
You cannot bench test this actuator.
Check for 12 volts at pin 2 on the actuator, this is power from pin C8 on the
Control PCB Assembly. Use a common ground to check this voltage. With
unit operating, phases A, B, C and D are switched to ground in a sequence.
With the door in a stationary position check for 12 volts, you should have 12
volts on each phase. When the door is being positioned, these phases will be
switched to ground. The voltage will be near zero on a switching phase.
N. Sleeper Temperature Sensor: Location see Freightliner ParkSmart
documents
This sensor monitors the sleeper internal temperature. See chart page 18 for
testing data.
If this sensor fails, the unit will default to 72 degrees.
O. Outside Air Temperature Sensor: Location see Freightliner ParkSmart
documents
This sensor monitors the ambient air temperature. See chart page 18 for testing
data.
If this sensor fails, the power management system stops and although the unit
will still operate, the total run time of the battery pack will be reduced.
18