LAUNCH         X-431 V V4.0 User Manual 
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Fig. 5-14 
The  tested  system  with  fault  code  appears  in  red  and  the  system  with  OK 
displays in black (normally).   
On-screen Buttons: 
Clear DTCs: Tap to clear the existing diagnostic trouble codes. 
  Note:  Diagnostic Trouble  Codes  or  Fault  Codes  can be  used  to  identify  which 
engine systems or components that are malfunctioning. Never replace a part based only 
on  the  DTC  definition.  Retrieving  and  using  DTCs  for  troubleshooting  vehicle 
operation is only one part of an overall diagnostic strategy. Follow testing procedures 
(in vehicle’s service manual), instructions and flowcharts to confirm the locations of the 
problem. 
Report: Tap to save it as a diagnostic report.