ASE A7 Heating Air Conditioning Practice Test

AC climate control network.

5. All of the following are true about the air temperature blend door in the circuit illustrated above EXCEPT:

  • A. It has a microchip and logic.
  • B. It operates on CAN Class A network.
  • C. The actuator contains a microchip and logic.
  • D. It operates on the CAN protocol.

5.

AC Class B climate control network.

Answer A is wrong. Each motor has a unique ID. An actuator with a lower ID has priority over an actuator with a higher ID.

Answer B is correct. There are three speeds. Class A is the slowest. The climate control network is typically on a Class B network with speeds up to 125 Kbps. Class C CAN operates at speeds up to 1 Mbps for engine and transmission critical sensor data.

Answer C is wrong. Each motor has a unique ID. An actuator with a lower ID has priority over an actuator with a higher ID.

Answer D is wrong. Vehicles manufactured in 2008 and up contain networks that operate on the CAN protocol.

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