Technician A says normal voltages on the LIN bus is up to 12 volts, which is pulled low during communications. Technician B says in the LIN bus, if a slave module is disconnected from the master module and the ignition switch is in the RUN position, the reading will be about 9.5 volts. Who is correct?
A) Technician A only
B) Technician B only
C) Both Technician A and B
D) Neither Technician A nor B

Question

Quizplus · Accepted Answer

The LIN (Local Interconnect Network) bus is a low-cost, single-wire network used for communication between components in vehicles. Technician A is correct because the normal voltage on the LIN bus can be up to 12 volts and is pulled low to signal communication. Technician B is also correct because if a slave module is disconnected, the voltage can indeed be around 9.5 volts due to the pull-up resistor in the circuit, maintaining a default voltage level when the bus is inactive or a node is disconnected.

Technician a Says Normal Voltages on the LIN Bus Is