Mazda P0642

See the basic definition of a diagnostic error. This will help you to clarify the main causes of the fault code. You will understand the program of the control unit

Basic DTC analysis according to OBD2 protocol standard.

OBD2 or On-Board Diagnostics displays messages for basic group styles. More comprehensible code composition has been standard since 2000. The DTC code consists of five characters and its composition will be shown in this video

Insight into programming

The basic unit for the operation of any computer is the bit. Logic 0 and 1 are expressed by a single bit. Diagnostics The error code is composed of 16 bits. The first two bits define one of the four basic circuits. The video will show you a comprehensive overview of the composition of the error report

A diagnostically understandable description of the Diagnostic Trouble Code

Mazda P0642

Basic error definition

Sensor Cluster Signal Out Of Range

Cause of DTC

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.