Launch Creader 629 - Diagnose; OBDII;EOBD Diagnosing

LAUNCH 629 User's Manual
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5. Diagnose
5.1 OBDII/EOBD Diagnosing
This option presents a quick way to check for DTCs, isolate the cause of the
illuminated Malfunction Indicator Lamp (MIL), check monitor status prior to
emissions certication testing, verify repairs, and perform a number of other
services that are emission-related.
After the tool is properly connected to the vehicle’s DLC, select [OBD II] on the
main menu screen and press [OK]. The tool will automatically start a check
of the vehicle’s computer to determine which type of communication protocol
it is using. When the tool identies the computer’s communication protocol, a
communication link is established and then the screen will display the Monitor
Status.
Note: A PROTOCOL is a set of rules and procedures for regulating data
transmission between computers, and between tesng equipment and computers.
Now ve dierent types of protocols (ISO 9141, Keyword 2000, J1850 PWM, J1850
VPW and CAN) are in use by vehicle manufacturers.
Figure 5-1
Press [OK], a screen similar to Figure 5-2 will appear: