LAUNCH    X-431 PRO Series User Manual 
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Note: Different vehicle has different diagnostic menus. 
A. Version Information 
This function is used to read the version information of system mode, vehicle 
VIN, software and ECU. 
B. Read Fault Code 
This function displays the detailed information of DTC records retrieved from the 
vehicle’s control system. 
*Note: Retrieving and using DTCs  for troubleshooting vehicle operation is  only one 
part  of  an  overall  diagnostic  strategy.  Never  replace  a  part  based only  on  the  DTC 
definition. Each DTC has a set of testing procedures, instructions and flow charts that 
must be followed to confirm the location of the problem. This information can be found 
in the vehicle’s service manual. 
In Fig. 5-18, tap “Read DTC”, the screen will display the diagnostic result. 
 
Fig. 5-19