Through the above detection of the fault code analysis, are historical fault code, clear the system after the trouble code no longer x431 appears. Description of Launch X431 V multiple systems to record the history of the fault code is due to the previous technicians to repair the vehicle, in the case of non-standard operation, man-made fault code, and vehicle failure is not directly related.
Static detection, read the transmission system data stream, and did not find the exception. Before the technician also replaced the transmission computer board, x431 v tablet gear actuators, clutch actuators, gear switch, gear bar TGS sensor, dashboard, junction box and check the relevant lines, etc., failed to rule out the failure. Indicating that the possibility of component damage is almost zero.
From the transmission failure protection control logic analysis, the fault can only travel with 1 and R block, only TCU no (EOL) learning data will Launch X431 v WIFI 8 inch appear in the state. In the case of a fail-safe case, the instrument panel shift information window will display the "E" mark. But the car dashboard gear information window shows normal, indicating that the transmission Launch 8 inch computer board (TCU) did not enter the failure protection mode.
Further analysis, if the sensor and actuator failure, the probability of generating a fault code is very large, but the car does not have a real fault code. If the input signal is a problem, it will not necessarily produce a fault code. Combined with the Launch V Tablet fault occurs when the file down to 1 block, dashboard display 1 gear information (not D1 range information), only the manual mode will appear such a gear display state. Therefore, it is still necessary to further check the manual mode gear input signal.
auto diagnostic tool (1)