Main signal
A fault points to a system but is not enough to identify the part.
Use case
Workshop fault diagnosis with Diagolia
This example shows how Diagolia can help structure a workshop case without taking the final decision away from the technician.
Key point
Reasoning support, not an automatic decision
In a workshop workflow, Diagolia helps order the case, cross-check sources and suggest checks, then the technician confirms the cause.
Start
Initial situation: recurring emissions-related fault
A vehicle arrives at the workshop with an engine warning light, a message related to the emissions system and a fault code that returns after clearing. The customer reports intermittent occurrence, without systematic loss of power.
The case contains the DTC, symptoms, mileage, previous interventions and a few visual observations.
Context
Conditions of occurrence and recent interventions are added to the case.
Goal
Avoid replacing an expensive part too quickly without prior checks.
Analysis
Diagolia connects the available information
The platform compares the DTC with symptoms, technical resources and similar cases. It looks for causes that best explain all signals together.
A hypothesis can become more important if it appears in several sources and leads to a simple check before replacement.
- 01
Case reading
Codes, symptoms, vehicle information and observations are grouped.
- 02
Sources consulted
Documentation, similar cases and field feedback are compared.
- 03
Suggested hypotheses
Causes are ranked according to their consistency with the case.
- 04
Targeted checks
The technician chooses which verifications to perform on the vehicle.
Sources
Sources explain why a hypothesis is prioritized
In this type of case, Diagolia can highlight a cause related to dosing, a sensor, an adaptation or a clogged component depending on the affected system.
The presentation must remain cautious: sources guide the reasoning, but do not replace a measurement or inspection.
- documentation indicates system check points;
- similar cases show causes already encountered;
- workshop observations confirm or weaken each hypothesis.
Decision
The final decision remains with the technician
Diagolia can recommend checking a supply, sensor value, clogging, leak or adaptation before replacement.
The technician then decides on the method, performs measurements, confirms the cause and chooses the appropriate intervention.
FAQ
Frequently asked questions
Is this example a manufacturer procedure? +
No. It is an example of workshop reasoning. Official procedures and safety instructions must always be followed.
Can Diagolia suggest several hypotheses? +
Yes. Several causes can remain possible. The value is to rank them and suggest checks that reduce uncertainty.
Who validates the final fault? +
The technician. Diagolia helps structure the analysis, but validation is done through checks and measurements on the vehicle.
Diagolia
Structure your next diagnostics with Diagolia
Diagolia helps organize the case information, cross-check available sources and prepare useful checks before intervention.