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8.5 Generic OBDII Operations
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 OBDII/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 Top Toolbar
Buttons on Service Menu on page 27 for details.
8.5.1 General Procedure
➢ To access the OBDII/EOBD diagnostics functions
1. Tap the Diagnostics application button on the MaxiTPMS 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.
⚫ Protocols – when this option is selected, the screen displays 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
OBDII Diagnostic Menu to display.
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