DTC Mechanism in Automotive

DTC Meaning: What is a DTC code?

Let’s start by explaining the DTC meaning first.

DTC stands for Diagnostic Trouble Codes.

A DTC code is a series of diagnostic trouble codes used by a vehicle’s onboard diagnostics (OBD) system to alert you when a vehicle experiences a malfunction. Different DTC codes represent specific problems in your vehicle.

When the vehicle’s OBD system detects a problem, it generates a specific DTC code and transmits the alert to the vehicle’s instrument panel as a warning light. In vehicles equipped with a telematics system, the alert can be delivered directly to the fleet. The system can be set up to deliver the alert right to the maintenance department.

These codes were created by the Society of Automotive Engineers (SAE) to help vehicles comply with emission regulations. SAE is now called SAE International, and it is the professional organization that develops standards for automotive engineers.
Standard fault code list

If a vehicle’s manufacture date is 1996 or newer, it will most likely be OBD-II compliant.

The vehicle’s electronic system performs self-diagnosis and reporting. Any time the system detects a problem, it records that problem as a code. That code is known as a (DTC) diagnostic trouble code.
How do DTC codes work?

Diagnostic Trouble Codes or OBD-II (in light-duty vehicles) or J1939 (in heavy-duty vehicles) trouble codes are codes that the vehicle’s OBD system uses to notify you about a problem. Each code corresponds to a fault detected in the vehicle. When the vehicle’s computer detects an issue that requires attention, it will activate the corresponding trouble code.
What does a DTC mean in a vehicle?

The engine control module (ECM) functions as the main computer on all newer model vehicles. The ECM is also commonly referred to as the engine control unit (ECU) or powertrain control module (PCM).

When your vehicle’s ECM is directly connected to your company via telematics, app, or gateway, you can find out in real-time from your desk in the home office what’s going on with the vehicle. KeepTruckin’s vehicle diagnostics automatically monitors fault codes through its direct connection to on-board vehicle diagnostics.
Diagnostic trouble codes you need to look for

KeepTruckin’s onboard diagnostics monitoring system may help you avoid costly repairs and reduce vehicle downtime. With real-time notification and a description of the fault code, the fleet manager can make the appropriate decision. That may be to drive to an outside shop or have the driver return to the carrier’s home base for repairs.

Having one person monitor incoming telematics from the entire fleet brings significant advantages. For instance, the data can be used to route drivers and assign loads to trucks that do not need service.

Over time, a company can learn how to prioritize data and look for trends. This allows the company to use preventive maintenance and extend the life of its fleet by optimizing the availability of the assets.