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Chapter 6 OBD Direct Operations
This Home screen option allows you to access Generic OBD-II/EOBD Scanner tests without
completing a vehicle identification. OBD Direct presents a quick way to check for diagnostic
trouble codes (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. This mode is also used for testing OBD-II/EOBD compliant
vehicles that are not included in the Scanner databases.
OBD Direct is a Scanner function, and the Scan Module must be connected to the test vehicle and
communicating with the Display Device. This function only provides generic OBD-II/EOBD
information. To access enhanced OBD-II/EOBD functions, select Scanner from the Home screen.
Selecting OBD Direct on the Home screen opens a menu with two options (
Figure 6-1):
Figure 6-1 Sample OBD Direct main menu
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).
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