DTC B0790 Hummer

Description

Case 1 Lateral Acceleration Sensor Signal Offset The measured lateral acceleration is monitored if the vehicle is standing still (vehicle speed lt; 1.0 kph). A failure is detected if |measured lateral acceleration| gt; 0.714G is continued for 0.1sec. A failure is detected if the absolute value of the calculated lateral acceleration sensor signal offset is higher than 0.1734G for 7msec. Case 2 Lateral Acceleration Sensor Signal Plausibility Constant speed without turning driving - A failure is detected if |The difference between the reference signal and the sensor signal| gt; 0.51G is continued for 0.5sec. maneuvers with variable speed and steering - A failure is detected if |The difference between the reference signal and the sensor signal| gt; 1.12G is continued for 1.75sec. Case 3 Yaw Rate Sensor Signal Offset The measured yaw rate sensor signal is monitored when the vehicle is standing still. A failure is detected if the absolute value of the yaw rate sensor signal is continuously higher than 20° s longer than 0.1sec or higher than 10° s during the last 5.0s before vehicle drive-off. A failure is detected during vehicle drive-off if the difference between the measured yaw rate sensor signal and the latched signal value during vehicle stand-still is higher than 13° s. A failure is detected if the absolute value of the calculated yaw rate sensor offset is higher than 6° s for 7msec. Case 4 Yaw Rate Sensor Signal Plausibility Constant speed without turning driving - A failure is detected if |The gradient of the measured sensor signal| gt; 540° s and |The difference between the reference signal and the sensor signal| gt; 10° s are continued for 0.25sec. - A failure is detected if |The gradient of the measured sensor signal| lt; 540° s and |The difference between the reference signal and the sensor signal| gt; 10° s are continued for 0.5sec. Fixed radius constant speed driving - A failure is detected if |The gradient of the measured sensor signal| gt; 540° s and |The difference between the reference signal and the sensor signal| gt; 13° s are continued for 0.25sec. - A failure is detected if |The gradient of the measured sensor signal| lt; 540° s and |The difference between the reference signal and the sensor signal| gt; 13° s are continued for 0.5sec. Maneuvers with variable speed and steering - A failure is detected if |The gradient of the measured sensor signal| gt; 540° s and |The difference between the reference signal and the sensor signal| gt; 53° s are continued for 0.25sec. - A failure is detected if |The gradient of the measured sensor signal| lt; 540° s and |The difference between the reference signal and the sensor signal| gt; 53° s are continued for 1.75sec.