Asked by Kashif Zaidi on Jun 22, 2024
Verified
When a current truck uses an electronically controlled A/C system,which of the following is usually true?
A) networked to J1939 data bus
B) controller is SA 25/MID 190
C) A/C compressor clutch is an ECU output
D) all of the above
Electronically Controlled
Refers to systems or components regulated or operated through electronic signals and sensors rather than manual or mechanical means.
J1939 Data Bus
The physical neural network of a CAN 2.0 network bus using J1939 protocols consisting of a twisted two-wire pair, SA stubs, and two terminating resistors. Used as the primary powertrain bus even in systems using multiple auxiliary buses. Theoretically capable of speeds of up to 1 Mb/s but usually maxed out at 500 Kb/s in current applications.
ECU Output
The signals or commands sent out by an Engine Control Unit to various systems within a vehicle.
- Comprehend how electronically controlled A/C systems in trucks are integrated with vehicle data buses.
Verified Answer
KR
Kimberly ReyesJun 26, 2024
Final Answer :
D
Explanation :
All of the options are typically true for a current truck using an electronically controlled A/C system. The system is often networked to the J1939 data bus for communication with other vehicle systems, the controller is designated as SA 25/MID 190, and the A/C compressor clutch operation is controlled by an output from the ECU.
Learning Objectives
- Comprehend how electronically controlled A/C systems in trucks are integrated with vehicle data buses.