Cummins Medium Duty – ISB, ISC, ISL: Engine & Aftertreatment Diagnostics


4 day Class (Tuesday-Friday) | Max Available seats: 12

Dedicated classes available— please call for details

COURSE DESCRIPTION: This course delves into theoretical and hands-on training for troubleshooting the Engine Control, Aftertreatment, and Fuel Systems. It emphasizes proper repair procedures for the Cummins ISB, ISC, and ISL engines. On completion, technicians will be adept in using QuickServe, Insite, and other troubleshooting tools specific to the ISB, ISC, and ISL engines. Hotel & Lunch are included.



  • Navigating QuickServe Online
  • Navigating Cummins Insite
  • Visual and Read Functions
  • Write Functions
  • Fault Code Guidance
  • Aftertreatment
  • Electronic Control Systems
  • Skills Assessment
  • For a detailed Course Syllabus, please contact us

LOCATION: ETT Training Center

TRITECH Expert Technician Training Center is in New Braunfels, TX, while the San Antonio, TX airport (SAT) is 35.5 miles from training center and the Austin, TX airport (AUS) is 47 miles from ETT training center. Please plan on arriving the Monday prior to class starting on Tuesday and departing Fridays 3:00pm or after.


Fairfield Inn & Suites by Marriott

1465 I-35 New Braunfels, TX 78130

What to do while in town?

New Braunfels is Centrally located between Austin and San Antonio and is best known for the Comal and Guadalupe Rivers, great food, live music and the nearby Gruene Historic District.


Technicians must bring appropriate Personal Protective Equipment (PPE), safety shoes, eye protection and ear protection. All safety procedures and warnings must be followed. High pressure fuel and temperature warning. Exposure to rotating components. Always watch out for each other and if see any liquid spills, please clean up immediately.


Please complete 1 Enrollment Form per enrollee to reserve a slot in an upcoming Cummins Engine Training class. Enrollment Forms can be requested by email at or by phone at 830-743-9720. Registrations will be accepted up to the start of class and are subject to available seats. See Cancellation Policy