User Manual
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LAUNCH Professional 123X User Manual
EN
*Notes:
1. If you plan to take the vehicle to a Service Center for repair, DO NOT erase the codes
from the vehicle’s computer. If data is erased, valuable informaon that might help
the technician troubleshoot the problem will also be erased.
2. Clearing DTCs does not fix the problem(s) that caused the code(s) to be set. If
proper repairs to correct the problem that caused the code(s) to be set are not
made, the code(s) will appear again and the check engine light will illuminate as
soon as the problem that cause the DTC to set manifests itself.
D. Read Data Stream
This option retrieves and displays live data and parameters from the vehicle’s
ECU.
In Fig. 5-6, tap “Read Data Stream”, the system will display data stream items.
Fig. 5-7
On-screen Buttons:
Select All: Tap it to select all items of the current page. To select certain data
stream item, just check the box before the item name.
Unselect: Tap it to deselect all data stream items.
OK: Tap it to conrm and jump to the next step.
After selecting the desired items, tap “OK” to enter the data stream reading
page.