Smart Battery Shut-Off Switch
Warning: Turning the smart battery shut-off switch to OFF does not disconnect power to all electrical components (e.g. the sSAM). To work safely on high voltage components, the vehicle must be decommissioned.
Important: The keyswitch should be in the off position before turning the smart battery shut-off switch on or off.
The smart battery shut-off switch is located inside the cab on the outboard side of the driver's seat.
The smart battery shut-off switch can be used to open (turn off) or close (turn on) the circuits between the low-voltage battery and the battery cable access box (BCA). Where pressing the eStop button prevents the high-voltage system from turning on, turning off the smart battery shut-off switch disables the low-voltage power that enables cab and chassis functions.
To avoid accidental activation, the smart battery shut-off switch must be pressed and held for two seconds when turning on or off.
A vehicle in daily use would have the smart battery shut-off switch turned ON. When the switch is set to ON, a red LED indicator on the switch illuminates. See Fig. . The switch has interlocks to prevent it's status from being changed while a vehicle is in operation.
Fig. 1, Smart Battery Shutoff Switch
Turning the smart battery shut-off switch OFF minimizes the power draw on the battery, preserving battery life and the ability of the vehicle to start after being parked for a number of days.
The smart battery shutoff switch should be set to OFF if the vehicle is going to be parked for more than two days. The smart battery switch must be ON when the vehicle is plugged into a charger.