CDL Pre‑Trip Inspection Procedure

Detailed procedure for completing CDL pre-trip inspections.

Pre-Inspection Documentation

  • Verify CDL license class matches vehicle type being operated.
  • Check medical card expiration date (must be valid).
  • Review previous DVIR and verify defects were repaired.
  • Confirm vehicle registration and insurance are current.
  • Check all required permits for route and cargo.
  • Verify Hours of Service compliance before starting.
  • Document start time of inspection in logbook.

In-Cab Safety Check

  • Adjust seat for proper pedal reach and steering control.
  • Check seat belt operation and adjust for secure fit.
  • Adjust all mirrors for maximum visibility.
  • Test horn for proper operation.
  • Verify emergency equipment is present and functional.
  • Check fire extinguisher charge and mounting.
  • Ensure three reflective triangles are available.
  • Test all interior lights and gauge illumination.

Engine Start & Gauge Check

  • Start engine and check for unusual noises.
  • Verify oil pressure builds within 15 seconds.
  • Check temperature gauge rises gradually.
  • Confirm voltmeter shows charging.
  • Monitor air pressure gauge (if air brakes).
  • Look for warning lights or alarms.
  • Test windshield wipers and washer operation.
  • Check DEF level gauge if equipped.

Air Brake System Inspection

  • Pump brakes to reduce air pressure below 90 PSI.
  • Check build time to 120 PSI (under 3 minutes).
  • Test governor cut-out at 120-140 PSI.
  • Perform static leak test (max 3 PSI/minute).
  • Apply service brakes for applied leak test (max 4 PSI/minute).
  • Fan brakes to test low air warning (55-75 PSI).
  • Continue fanning to test spring brake activation (20-45 PSI).
  • Check brake adjustment with proper PPE.

External Walk-Around Start

  • Begin at driver's door, proceed counterclockwise.
  • Check fuel cap secure and no leaks present.
  • Inspect step condition and door operation.
  • Verify mirror mounting and adjustment.
  • Check left front tire pressure and condition.
  • Inspect wheel, lug nuts, and hub oil seal.
  • Check suspension components for damage.
  • Verify mud flap presence and condition.

Front of Vehicle Inspection

  • Check headlights for cracks and proper aim.
  • Verify turn signals and parking lights work.
  • Inspect windshield for cracks in swept area.
  • Check wiper blade condition and arm security.
  • Verify license plate is clean and visible.
  • Look under vehicle for leaks or damage.
  • Check steering components for wear.
  • Inspect front axle and suspension.

Side and Rear Inspection

  • Check all marker lights and reflectors.
  • Inspect cargo area doors and latches.
  • Verify load security and weight distribution.
  • Check all tires for proper inflation and tread.
  • Inspect dual tires for objects between them.
  • Check brake hoses and chambers for leaks.
  • Verify tail lights, brake lights, and signals work.
  • Ensure rear license plate is clean and lit.

Final Checks & Documentation

  • Return to cab and test service brakes.
  • Check parking brake holds vehicle.
  • Test trailer brake operation if applicable.
  • Complete Driver Vehicle Inspection Report.
  • Note any defects found during inspection.
  • Sign DVIR with date and time.
  • Report defects to maintenance immediately.
  • File paperwork as required by carrier.
Use Checklist Online