LER.me

Make All Learning Count.

Get Connected

  • What is a LER?
  • FAQs (opens in new tab)
  • Partner with Us
  • Visit EBSCOed (opens in new tab)

View our Policies

  • Accessibility (opens in new tab)
  • Standards (opens in new tab)
  • Terms of Use (opens in new tab)
  • Privacy Policy (opens in new tab)
  • Opt out (opens in new tab)

Get the app

Get it on Google PlayDownload on the App Store

© 2026 All rights reserved.

Powered by EBSCOed

Skip to main contentSkip to footer
  • Live Data
My LER
My LER
  1. Programs
  2. Heavy-Duty Diagnostics

Heavy-Duty Diagnostics

National Coalition of Certification Centers (NC3)

Certification

Become a contributor for free to openly demonstrate student outcomes, industry alignment & eligibility criteria.

Students who earn the Heavy Duty Diagnostics Certification have completed hands-on training with state-of-the-art Snap-on equipment developed for diesel repair and maintenance.

Format

Hybrid

Eligibility Calculator

Which aid programs apply to this program?

Record QualityEligibility Calculators
Loading Skills & Competencies
Program Pathways

Credentials this program stacks toward

No program pathways.

Loading What You'll Learn
Program Details

Detailed information about this program

Students who earn the Heavy Duty Diagnostics Certification have completed hands-on training with state-of-the-art Snap-on equipment developed for diesel repair and maintenance. The certification demonstrates that graduates have attained a solid understanding of scanner controls and operation, providing them with TOOLS FOR LIFE required to service computer-controlled diesel vehicles. Today's diesel and heavy duty vehicles require computerized diagnostics to properly identify problems. As the leader in aftermarket diesel vehicle diagnostics, Snap-on developed a certification course that includes classroom training and advanced lab exercises. Course content includes understanding scanner controls and navigation, using vehicle communication software, cause and effect, and troubleshooting techniques.

Requirements

What you need to earn this credential

No requirements listed.

Financial Aid

Eligible funding programs

No funding information available.

Scholarships

No scholarships listed.

Visit Program Website
Locations

Where this program is offered

No locations specified.

Loading Student Outcomes
Related Programs

Programs related to this one

No related programs.

Skills & Competencies

Skills developed through this program

  • Navigate heavy duty scanner controls
  • Use vehicle communication software
  • Apply cause and effect diagnostics
  • Troubleshoot heavy duty diesel
  • Service computer-controlled diesel vehicles
Career Pathways

Occupations this program prepares you for

  • Bus and Truck Mechanics and Diesel Engine Specialists49-3031.00
  • Mobile Heavy Equipment Mechanics, Except Engines49-3042.00
  • First-Line Supervisors of Mechanics, Installers, and Repairers49-1011.00
What You'll Learn

Key competencies developed through this program

Auto-populated·from NSX Competency Framework

Mastery: developing (Level 2)(based on Certification)

  • Hand tools, pneumatic wrenches, and welding equipment — select and operate with limited oversight to complete scheduled repairs on medium-duty diesel trucks.
  • Brake systems, wheel bearings, and steering mechanisms — inspect and evaluate independently against manufacturer specifications during scheduled preventive maintenance visits.
  • Hydraulic hoists and floor jacks — position and operate without direct supervision to safely raise buses and heavy equipment in a busy fleet shop.
  • Brake relining, wheel alignment, and bolt torquing — adjust and complete reassembly to specification across a range of commercial vehicle models encountered in daily workflow.
  • Motor analyzers and chassis diagnostic charts — connect and interpret readings to isolate malfunctions on diesel engines with moderate complexity in a fleet maintenance environment.
  • Preventive maintenance intervals — manage and document oil changes, battery load tests, and lubrication cycles for multiple vehicles using facilities management software.
  • Safety guards and critical fasteners — systematically examine and adjust on returning fleet vehicles, escalating findings that exceed acceptable tolerances to senior staff.
  • Diagnostic data from handheld computers and pressure gauges — analyze and cross-reference to narrow probable causes of reported drivability complaints on route buses.
  • Repair timelines and work orders — prioritize and communicate with dispatchers and service writers to ensure on-time vehicle return in a high-volume commercial shop.
  • Troubleshooting findings and repair recommendations — document clearly using word processing and spreadsheet software to maintain accurate vehicle service histories.

Some details on this page are auto-populated from public workforce data sources: O*NET (opens in new tab), BLS (opens in new tab), College Scorecard (opens in new tab), DOL Training Provider Results (opens in new tab), NSX (opens in new tab). Provided in partnership with LER.me Career Intelligence.

Student Outcomes

Performance metrics for this program

Completion Rate
Not reported
Placement Rate
Not reported