Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Test 31B - EVIC Panel Switch Test
Raise and support vehicle. Using DRB, read Vehicle Speed Sensor (VSS) signal. Start engine. Place shift lever in gear. Gradually accelerate vehicle. If DRB displays increasing speed as vehicle is accelerated, verify customer's complaint and retest system. If DRB does not display increasing speed as vehicle is accelerated, see appropriate TESTS W/CODES - 3.0L article in ENGINE PERFORMANCE section.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.