LAUNCH X-431 V V4.0 User Manual
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provide insight on overall vehicle performance. It can also be used to guide
vehicle repair.
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.
Note: The real time (Live Data) vehicle operating information (values/status) that
the on-board computer supplies to the tool for each sensor, actuator, switch, etc. is
called Parameter Identification Data (PID).
On the test function selection screen, tap “Read Data Stream”, the system will
display data stream items.
On-screen Buttons:
Select Page: Tap it to select all items of the current page.
Select All: Tap it to select all items. To select certain data stream item, just
check the box before the item name.
Unselect: Tap it to deselect all data stream items.
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