Which vehicle type is not compatible with ASM testing?

• A. Motorhomes under 4,000 pounds
• B. Passenger cars with GVWR under 3,000 pounds
• C. Motorhomes over 8,500 pounds
• D. Pickup trucks under 6,000 pounds

Answer: (C)

ASM testing is designed for light-duty vehicles, with a weight limit that keeps it within the range of typical cars, light trucks, and smaller motorhomes. When a vehicle exceeds that limit—specifically motorhomes with a GVWR over 8,500 pounds—the ASM method isn’t suitable because the testing equipment and procedures aren’t designed for such heavy weights and their different emissions characteristics. That’s why motorhomes over 8,500 pounds aren’t compatible with ASM testing. The lighter options listed (smaller motorhomes, passenger cars, and pickup trucks under the specified GVWRs) fit within the lightweight category that ASM is meant to handle.