STEP DIAGNOSTICS — AUTOMOTIVE DIAGNOSTIC PROCESS CHECKLIST
Original documentation worksheet. Not an OEM test procedure.
Status per section: COMPLETE / OPEN / NOT APPLICABLE (include reason).

Repair order: __________________ Date: __________________
Vehicle/configuration: __________________ Technician: __________________

1. CONCERN AND SCOPE
Customer report: ___________________________________________________
Observed concern and conditions: ____________________________________
Agreed diagnostic scope/contact: ___________________________________
Status and reason: _________________________________________________

2. STARTING RECORD
Inspection and diagnostic records collected: ________________________
Evidence filenames/location: ________________________________________
Coverage or access limits: __________________________________________
Status and reason: _________________________________________________

3. NEXT TEST
Question to distinguish: ____________________________________________
Applicable service reference: _______________________________________
Requirements, precautions and decision criteria: _____________________
Missing prerequisite, if any: _______________________________________
Status and reason: _________________________________________________

4. RESULT AND DECISION
Test actually performed/conditions: _________________________________
Observation and evidence reference: _________________________________
Interpretation and remaining uncertainty: ___________________________
Next action and reason: _____________________________________________
Status and reason: _________________________________________________

5. REPAIR DECISION
Finding addressed/proposed work: ____________________________________
Open uncertainty: ___________________________________________________
Shop authorization status/reference: ________________________________
Status and reason: _________________________________________________

6. VERIFICATION AND HANDOFF
Work completed: _____________________________________________________
Applicable verification performed/conditions/result: _________________
Outcome for original concern: _______________________________________
Open items and limits: ______________________________________________
Next action/owner: __________________________________________________
Status and reason: _________________________________________________

Use applicable vehicle information and equipment instructions.
Do not mark an unperformed or inconclusive check as complete.
https://stepdiagnostics.com/blog/automotive-diagnostic-process-checklist