Diagnostic Symbol Key

The RealFix-AI Diagnostic Brain reasoning engine itself.

Product mark, reasoning sections, engine status.

The single most likely direction the evidence currently supports.

Command Center primary direction, report summary.

The reported complaint, in the customer's own terms.

Concern tile, concern verification.

Confirmed vehicle identity: VIN, year/make/model, engine, drivetrain.

Vehicle tiles, report header, VIN decode.

Statement is backed by an approved, verified source.

Verified matches, OEM citations, source badges.

The failure's root cause is objectively established.

Root Cause section, confirmed conclusions.

Technician-supplied evidence has been captured into the case.

Upload controls, attachment chips.

Close reading of an uploaded document or data set.

Uploaded Evidence Intelligence, document review.

Weighing supporting evidence against conflicting evidence.

Evidence weighting, confidence rationale.

Required information is absent from the case.

Missing data callouts, insufficient-information states.

Circuit schematic supplied as evidence.

Evidence types, electrical sections.

Photograph supplied by the technician.

Attachment chips, evidence lists.

Scan-tool parameter identifiers and freeze-frame data.

Data evidence, PID tables.

Oscilloscope waveform captured and interpreted.

Waveform evidence, signal review.

Multimeter measurement recorded as objective evidence.

Measurement rows, electrical tests.

Connector, terminal, or pin integrity inspection.

Electrical checks, wiring evidence.

The three-phase lifecycle: verify concern, evidence, repair.

Verification banners, lifecycle status.

Repair re-tested under the original failure conditions.

Repair Verification Plan, completion screens.

Evidence conflicts with the current diagnostic direction.

Contradiction Detection section, conflict chips.

Fundamental shop checks reviewed before advanced diagnosis.

Common-Sense Review section.

Workflow caution with no effect on diagnostic confidence.

Practical workflow warnings.

Personal or vehicle safety hazard during the procedure.

Safety callouts in reports and tests.

New evidence increased diagnostic confidence.

Confidence deltas, gauges, dashboards.

New evidence reduced diagnostic confidence.

Confidence deltas, contradiction impact.

The single highest-value question to ask next.

Next-step prompts, follow-up requests.

The single highest-value test to perform next.

Command Center next-step tile, test plans.

A test that proves or disproves the hypothesis.

Proof Tests section, test tables.

Manufacturer pinpoint test procedure step.

Procedure references, test plans.

Test completed with the expected result.

Test result rows, verification outcomes.

Test completed with an out-of-spec result.

Test result rows, fault confirmation.

Result is inconclusive; deeper investigation required.

Inconclusive outcomes, alternative causes.

OEM service information or specification document.

Source citations, document lists.

Technical service bulletin referenced by number.

TSB chips, OEM navigation.

Safety recall campaign referenced by number.

Recall chips, OEM navigation.

Electrical power, ground, and circuit domain.

System tags, failure families.

Mechanical, driveline, and structural domain.

System tags, failure families.

Fuel delivery, pressure, and trim domain.

System tags, failure families.

Air intake, boost, and vacuum domain.

System tags, failure families.

Temperature-dependent operating condition.

Operating conditions, cooling faults.

Module network / bus communication behavior.

Network faults, U-code sections.