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35
LAUNCH Professional 919X User Manual
Note: A PROTOCOL is a set of rules and procedures for regulating data
transmission between computers, and between testing equipment and computers.
Now five different types of protocols (ISO 9141, Keyword 2000, J1850 PWM,
J1850 VPW and CAN) are in use by vehicle manufacturers.
Tap “OK” to enter the diagnostic test modes selection screen.
Note: Diagnostic Test Modes as described in the latest OBD II standard SAE
J1979. Not all Modes are supported by all vehicles.
$01 - Request Current Powertrain Diagnostic Data
$02 - Request Powertrain Freeze Frame Data
$03 - Request Emission-Related Stored DTCs
$04 - Clear/Reset Emission-Related Diagnostic Information
$05 - Request Oxygen Sensor Monitoring Test Results (2007 and older vehicles
only)
$06 - Request On-Board Monitoring Test Results for Specic Monitored Systems
$07 - Request Emission-Related Stored DTCs Detected During Current or Last
Completed Driving Cycle
$08 - Request Control of On-Board System, Test or Component
$09 - Request Vehicle Information
$0A - Request Emission-Related Permanent DTCs
It mainly includes the following functions:
1. Read Codes
This option is used to identify which section of the emission control system
has malfunctioned.
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