In an Enhanced area, what type of test will an all-wheel drive vehicle receive?

• A. ASM test
• B. BAR Referee test
• C. OBD II test
• D. Dyno idle test

Answer: (A)

In Enhanced areas, all-wheel-drive vehicles are tested using Acceleration Simulation Mode. This method provides a controlled dynamometer profile that simulates driving acceleration and road load, which is necessary because the AWD drivetrain distributes torque to multiple wheels and can skew readings if you just do a simple idle or standard dyno test. The ASM test exercises the engine and emission-control systems under conditions that resemble actual driving, yielding a more accurate and fair measurement of emissions for AWD vehicles. Other test types shift focus elsewhere—OBD II checks onboard diagnostics, a dyno idle test evaluates at idle without simulated acceleration, and BAR Referee is used only for difficult cases.