User Manual

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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. Functions of the
diagnostics toolbar buttons at the top of the screen are the same as those available for
specific vehicle diagnostics. See Table 4-2 Diagnostics Toolbar Buttons on page 26 for
details.
General Procedure
➢ To access the OBD II/EOBD diagnostics functions
1. Tap the Diagnostics application button from the MaxiSys Job Menu. The
Vehicle Menu displays.
2. Tap the EOBD button. There are two options to establish communication with
the vehicle.
⚫ Auto Scan – select it to establish communication using each protocol in
order to determine which one the vehicle is broadcasting on.
⚫ Protocol – select it to open a submenu of 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 if the Protocol option is selected. Wait for the OBD II
Diagnostic Menu to appear.
Figure 4-17 Sample OBD II Diagnostic Menu