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OBD-II/EOBD
OBD Health Check
6.1.2 Global OBD II Clear Codes
This option is used to clear all emission related diagnostic data, such as DTCs, freeze frame data,
and test results, from the memory of the selected ECM. Although OBD-II/EOBD only displays
generic OBD-II/EOBD data, clearing codes erases all of the stored data, including any enhanced
codes and freeze frame information.
A confirmation screen displays when the clear codes option is selected to prevent accidental loss
of data. Select Yes on the confirmation screen to continue. Refer to and the
Global OBD Vehicle
Communication Software Manual
for additional information.
6.1.3 Readiness Monitors
Use this menu option to check the readiness of the monitoring system. An OBD-II /EOBD system
checks the status of emission-related subsystems by running continuous or periodic tests. Two
viewing options are available once Readiness Monitors is selected:
•
Monitors Complete Since DTC Cleared
—displays the status of all monitors that have run
since the last time DTC were erased from PCM memory.
•
Monitors Complete This Cycle
—displays the status of the monitors that ran during the
current drive cycle only.
Select either option and test results are shown in the data viewer (
).
Figure 6-3
Sample readiness monitor test report
Scroll to view the entire list of Readiness Monitors to ensure that all tests are complete. It is
possible to save the monitor report as part of the vehicle records.
6.1.4 Connector Information
This option opens a database of vehicle diagnostic connector locations that includes most makes
and models. The menu driven interface leads you quickly to the difficult to find test connector.