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55
maintained throughout programming. The required voltage differs by vehicle
manufacturer. Consult vehicle manufacturer for correct voltage to be maintained.
Occasionally a flash update procedure may not complete properly. Common causes of
flash errors include poor cable connections between the tablet, VCMI, and vehicle, the
vehicle ignition being switched off before the flash procedure is complete, or low vehicle
battery voltage.
If the process quits, recheck all the cable connections to assure good communications
and initialize the flash procedure. The programming procedure will automatically repeat
if the previous operation does not succeed.
4.10 Generic OBD II Operations
The OBD II/EOBD vehicle diagnosis option offers 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 other emissions-related
services. The OBDII direct access option is also used for testing OBD II/EOBD-compliant
vehicles that are not included in the Diagnostics database. Diagnostics toolbar buttons
at the top of the screen are available for specific vehicle diagnostics. See Table 4-2
Diagnostics Toolbar Buttons on page 31 for details.
4.10.1 General Procedure
To access the OBD II/EOBD diagnostics functions
1. Tap the Diagnostics application button in 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 using.
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.
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