Circuit/System Verification
WARNING: This page is about a different car, the 2008 Isuzu i-370, 2008 Isuzu i-290, 2008 GMC Canyon, and 2008 Chevrolet Colorado. However, it is still accessible from the selected car via links, so may be relevant.
With scan tool installed drive the vehicle in a straight line at a speed greater than 30 km/h (19 mph) and decelerate the vehicle to a stop several times. The scan tool Longitudinal Accelerometer Sensor Signal parameter should show a change in M/S2 output in sequence to the vehicle deceleration.