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18
LAUNCH Professional 129X User Manual
*Note: Dierent vehicle has dierent diagnosc 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.
In Fig. 5-6, tap “Read DTC”, the screen will display the diagnostic result.
*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
denion. Each DTC has a set of tesng procedures, instrucons and ow charts that
must be followed to confirm the location of the problem. This information can be
found in the vehicle’s service manual.
On-screen Buttons:
Freeze Frame: When an emission-related fault occurs, certain vehicle conditions
are recorded by the on-board computer. This information is referred to as freeze
frame data. Freeze frame data includes a snapshot of critical parameter values
at the time the DTC is set.
Help: Tap to view the help information.
Code Search: Tap it to search for more information about the current DTC online.
Report: To save the current data in text format. All diagnostic reports can be
accessed from “Data” -> “Diagnostic Report”.
C. Clear Fault Memory
After reading the retrieved codes from the vehicle and certain repairs have been
carried out, you can use this function to erase the codes from the vehicle. Before
performing this function, please be sure the vehicle’s ignition key is in the ON
position with the engine off.
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