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OBD Direct Operations OBD Health Check
6.1 OBD Health Check
The OBD Health Check offers a way to quickly check for and clear generic diagnostic trouble
codes (DTCs) and to check readiness monitors. Selecting OBD Health Check opens a submenu
of options (Figure 6-2).
Figure 6-2 Sample OBD Health Check menu
6.1.1 Global OBD II Code Check
This option displays any stored emission related generic DTCs reported by the ECM. Selecting
opens a submenu with two choices:
• Codes
• Pending Codes
Codes
Codes displays a list of current emission related DTCs. OBD-II/EOBD Codes have a priority
according to their emission severity, with higher priority codes overwriting lower priority codes.
The priority of the code determines the illumination of the MIL and the code erase procedure.
Manufacturers rank codes differently, so expect to see differences between makes.
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