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OBD Direct Operations
OBD Health Check
Pending Codes
The purpose of this service is to enable the scan tool to obtain “pending” or maturing diagnostic
trouble codes. These are codes whose setting conditions were met during the last drive cycle, but
need to be met on two or more consecutive drive cycles before the DTC actually sets.
The intended use of this service is to assist the service technician after a vehicle repair and after
clearing diagnostic information, by reporting test results after a single driving cycle.
•
If a test failed during the driving cycle, the DTC associated with that test is reported. If the
pending fault does not occur again within 40 to 80 warm-up cycles, the fault is automatically
cleared from memory.
•
Test results reported by this service do not necessarily indicate a faulty component or system.
If test results indicate another failure after additional driving, then a DTC is set to indicate a
faulty component or system, and the MIL is illuminated.
6.1.2 Global OBD II Clear Codes
This option is used to clear all emission related diagnostic data such as, DTC records, freeze
frame data, and test results, from ECM memory. Although OBD Direct only displays generic
OBD-II data, clearing codes erases all of the stored data including any enhanced codes.
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
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. Test
results are shown in the data viewer (
Figure 6-3 Sample readiness monitor test report
Gesture sweep to view the entire list of Readiness Monitors to ensure that all tests are complete.
It is possible to print the readiness test status or save it as part of a Vehicle history.
