LAUNCH 
27 
D. Read Data Stream 
This option retrieves and displays live data and parameters from the vehicle’s ECU.   
Caution: If you must drive the vehicle in order to perform a troubleshooting procedure, ALWAYS have a second 
person help you. Trying to drive and operate the diagnostic tool at the same time is dangerous, and could cause a 
serious traffic accident.   
On the diagnostic function selection screen, tap 
Read Data Stream
, the following screen will appear.   
 
On-screen Buttons:
 
Select Page:
 Tap to select all items of the current page. 
Select All:
 Tap to select all items. To select certain data stream item, just check the box before the item 
name. 
Unselect: 
Tap to deselect all data stream items. 
OK:
 Tap to confirm and jump to the next step. 
After selecting the desired items, tap 
OK
 to enter the data stream reading page.   
 
*Notes:   
1.
 
If the value of the data stream item is out of the range of the standard (reference) value, the whole line will 
display in red. If it complies with the reference value, it displays in blue (normal mode). 
2.
 
The indicator 1/X shown on the bottom of the screen stands for the current page/total page number. Swipe the 
screen from the right/left to advance/return to the next/previous page.   
There are 3 types of display modes available for data viewing, allowing you to view various types of 
parameters in the most suitable way.   
  Value – this is the default mode which displays the parameters in texts and shows in list format.   
  Graph – displays the parameters in waveform graphs.