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

Question

Quizplus · Accepted Answer

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.

Technician a Says That HH-ESTs,OEM Software,and a DLC Can Be