Asked by Tatiana Salazar on May 26, 2024
Verified
Technician A says that HH-ESTs,OEM software,and a DLC can be used to access a J1939 data bus.Technician B says that a generic HH-EST loaded with a general heavy duty reader software can be used to program customer data to controller modules on the data bus.Who is correct?
A) Technician A only
B) Technician B only
C) Both A and B
D) Neither A nor B
DLC
Acronym for "Data Link Connector," an interface found in vehicles that allows access to the onboard diagnostics (OBD) system.
J1939 Data Bus
A communication protocol based on CAN (Controller Area Network) used in the heavy-duty trucking industry for electronic control units (ECUs) to communicate.
- Acquire knowledge of the connection protocols and compliance criteria essential for J1939 data bus access.
Verified Answer
AR
arjun ravindranMay 28, 2024
Final Answer :
A
Explanation :
Technician A is correct because HH-ESTs (Hand-Held Electronic Service Tools), OEM (Original Equipment Manufacturer) software, and a DLC (Data Link Connector) are indeed tools and interfaces used to access a J1939 data bus, which is a standard in the heavy-duty truck industry for communication between the various components of the vehicle. Technician B is incorrect because a generic HH-EST with general heavy-duty reader software typically cannot be used to program customer data to controller modules on the data bus; this usually requires specific OEM software or tools with the appropriate permissions and capabilities.
Learning Objectives
- Acquire knowledge of the connection protocols and compliance criteria essential for J1939 data bus access.