RAM 1500 Van V8-5.9L VIN Z LDC (2001)
Fig. 4 Bus Biasing
Fig. 5 Bus Termination
The power supplied to the data bus is known as bus biasing. Bus bias is provided through a series circuit. To properly bias the data bus circuits, a 5
volt supply is provided through a 13 kilo ohm resistor to the Bus (-) circuit. Voltage from the Bus (-) circuit flows through a 120 ohm termination
resistor to the Bus (+) circuit. The Bus (+) circuit is grounded through another 13 kilo ohm resistor. While at least one termination resistor is
required for the system to operate, most DaimlerChrysler systems use two. The second termination resistor serves as a backup. The termination
resistor provides a path for the bus bias voltage. Without a termination point, voltage biasing would not occur. Voltage would go to 5 volts on one
bus wire and 0 volts on the other bus wire.