Blower Motor and AC System Quiz

What is the first step in connecting an ammeter to the blower motor fuse?

• Switch ON the ignition and locate the blower motor fuse.

• Switch OFF the ignition and locate the blower motor fuse.

• Connect the ammeter directly to the battery.

• Turn the blower switch to full speed.

What does a high reading on the ammeter indicate when testing the blower motor?

• A motor fault

• A low resistance in the wiring

• A properly functioning motor

• A disconnected fuse

What should be done to ensure the AC is working at its full rate?

• Set the AC to minimum with fresh air intake.

• Run the engine and set the AC to maximum with recirculated air.

• Turn off the engine and open all windows.

• Set the AC to medium with outside air.

What is the purpose of fitting a manifold gauge set to the AC system?

• To release refrigerant into the atmosphere

• To measure AC pressures and inspect the system

• To increase the pressure in the AC system

• To change the refrigerant type

What is the primary purpose of multiplexing in vehicle systems?

• To increase the number of wires in a vehicle

• To combine several messages for transmission over the same signal path

• To reduce the number of control units

• To enhance the vehicle's speed

What is a data bus in the context of vehicle multiplexing?

• A single wire connecting the battery to the engine

• A couple of wires connecting the control units together

• A wireless communication system

• A type of vehicle engine

Which of the following is NOT a benefit of partial multiplex in vehicles?

• Reduction of wiring harness weight and bulk

• Improvement of system functions and responsiveness

• Increase in production costs

• Improvement in troubleshooting

Which control units were used in early multiplexing systems in vehicles?

• Engine control unit, brake control unit, and steering control unit

• Door control unit, driver's side control unit, and passenger's side control unit

• Climate control unit, audio control unit, and navigation control unit

• Transmission control unit, fuel control unit, and exhaust control unit

Diagram showing Bosch technologies for driver assistance and sub-system for doors

• Bosch technologies for engine management

• Bosch technologies for driver assistance and sub-system for doors

• Bosch technologies for infotainment systems

• Bosch technologies for braking systems

Which feature was added in the third generation of multiplex systems?

• Single bi-directional bus-type communication line

• Communication transfer speed of up to 16kKbit/s

• Integrated power window master switch

• Basic CAN (B-CAN) network