44
OBD-II/EOBD
OBD-II/EOBD Menu
Codes
The Codes option 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. Vehicle manufacturers have implemented the ranking differently, so
there are differences between makes.
Pending Codes
The purpose of this service is to enable the Diagnostic 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.
Use this service following a vehicle repair and code clearing procedure to verify test results after
a single drive cycle.
•
If a test failed during the drive 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.
Refer to and the
Global OBD Vehicle Communication Software Manual
for additional information.
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 displays generic
OBD-II/EOBD data only, 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 from the confirmation screen to continue. Refer to the
Global OBD Vehicle
Communication Software Manual
for additional information.
Readiness Monitors
Use to check the readiness status 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 DTCs were erased.
•
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 (
).
