Tuesday, May 5, 2020

What Is the Best Diagnostic Tool?

What Is a Diagnostic Tool?

Automotive technology evolves daily, and modern vehicles have far more electrical systems than older ones.

Mechanical faults on older cars were found and fixed by hand; today fault detection is much harder.

Diagnostic tools solved that problem and shifted workshops from mechanical to electronic service.

What Are They Used For?

Most vehicle data lives in the ECU (Electronic Control Unit). Faults are reported to the ECU, and diagnostic tools communicate with it so you can read faults in seconds.

Beyond fault reading, they support adaptation, calibration, injector coding, oil reset, service light reset, and more.

OBD (On-Board Diagnostics) started in the 1970s to monitor engine problems. Its main purpose is to detect emission-related faults and warn the driver.

After OBD I/OBD II in the US and EOBD in Europe, scope expanded in the 1990s to engine, chassis, body, and electronic systems.

OBD-II (OBD2): mandatory on US-sold vehicles from 1996. EOBD became mandatory for petrol cars in Europe in 2001 and diesel cars in 2003.

With a standard OBD interface and diagnostic tool you can:

Diagnose faults
Read faults
Clear faults
Register components
Repair faults
Perform adaptation or calibration
View live data

Diagnostic tools fall into two groups: passenger vehicles and heavy-duty vehicles.

For passenger cars, Autel devices are among the best choices for diagnostics, steering angle reset, service resets, and maintenance functions.

Leading Autel diagnostic tools:

For heavy-duty vehicles, the Jaltest diagnostic tool covers trucks, buses, construction machines, agricultural machines, marine, and more with one device — including Wabco, Knorr, and Haldex brake systems, simulation tests, and APM testing.

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