User Manual

40
Generic OBD II Operations
A fast-access option for OBD II/EOBD vehicle diagnosis is available on the
Vehicle Menu screen. This option presents a quick way to check for DTCs,
isolate the cause of an illuminated malfunction indicator lamp (MIL), check
monitor status prior to emissions certification testing, verify repairs, and
perform a number of other services that are emissions-related. The OBD
direct access option is also used for testing OBD II/EOBD compliant vehicles
that are not included in the Diagnostics database.
The diagnostics toolbar buttons at the top of the screen function the same as
those available for specific vehicle diagnostics. See Table 4-2 Diagnostics
Toolbar Buttons on page 21 for details.
General Procedure
 To access the OBD II/EOBD diagnostics functions
1. Tap the Diagnostics application button from the MaxiPRO Job
Menu. The Vehicle Menu displays.
2. Tap the EOBD button. There are two options to establish
communication with the vehicle.
 Auto Scan – when this option is selected, the diagnostic tool
attempts to establish communication using each protocol in
order to determine the one from which the vehicle is
broadcasting.
 Protocol – when this option is selected, the screen opens a sub
menu listing various protocols. A communication protocol is a
standardized way of data communication between an ECM and
a diagnostic tool. Global OBD may use several different
communication protocols.
3. Select a specific protocol under the Protocol option. Wait for the
OBD II Diagnostic Menu to display.