When safely performing a traction control system diagnostic trouble code (DTC) check the technician should

• A. Recalibrate Wheel Speed Sensors
• B. Erase All DTC Codes
• C. Follow the Diagnostic DTC Symptom Flow Charts
• D. Replace the ABS Module

Answer: (C)

Following the Diagnostic DTC Symptom Flow Charts provides the structured, evidence-based path you need to properly diagnose a traction control DTC. These charts guide you from the reported symptom and stored codes through a sequence of checks that pinpoint the actual fault rather than jumping to a guess. They tell you what data to observe, which components to test, and what outcomes confirm or rule out each possible cause. This approach helps you verify the problem safely and systematically, using live data, sensor testing, and wiring checks, so you don’t miss a fault or misdiagnose a simple issue as a bigger one.

Erasing all DTC codes isn’t the right starting move because it hides current faults and resets diagnostic history, making it harder to verify if the problem is resolved and what tests were needed. Recalibrating wheel speed sensors isn’t universally required for every DTC; it should only be done if the diagnostic flow or service procedure calls for calibration after a fault has been confirmed. Replacing the ABS module without confirming failure through the flow charts is premature and wastes time and parts; the charts direct you to determine whether the fault lies with sensors, wiring, the hydraulic control, or the module itself based on actual test results.