Equus 3120 - OBD 2&1 Tool Kit - Manual (Page 34)

32 OBD2 & 1
E
OBD2 Systems
I/M READINESS TESTING
■ If a Monitor was able to meet all the conditions required to enable it
to perform the self-diagnosis and testing of its assigned engine sys-
tem, it means the monitor "HAS RUN.”
■ If a Monitor has not yet met all the conditions required for it to per-
form the self-diagnosis and testing of its assigned engine system; it
means the Monitor "HAS NOT RUN.”
The Monitor Run/Not Run status does not show whether
or not a problem exists in a system. Monitor status only
indicates whether a particular Monitor has or has not run
and performed the self-diagnosis and testing of its asso-
ciated system.
Performing I/M Readiness Quick Check
When a vehicle first comes from the factory, all Monitors indi-
cate a “HAVE RUN” status. This indicates that all Monitors
have run and completed their diagnostic testing. The “HAVE
RUN” status remains in the computer's memory, unless the
Diagnostic Trouble Codes are erased or the vehicle's com-
puter memory is cleared.
The Tool allows you to retrieve Monitor/System Status Infor-mation to
help you determine if the vehicle is ready for an Emissions Test (Smog
Check). In addition to retrieving Diagnostic Trouble Codes, the Tool also
retrieves Monitor Run/Not Run status. This information is very important
since different areas of the state/country have different emissions laws
and regulations concerning Monitor Run/Not Run status.
Before an Emissions Test (Smog Check) can be performed, your vehi-
cle must meet certain rules, requirements and procedures legislated
by the Federal and state (country) governments where you live.
1. In most areas, one of the requirements that must be met before a
vehicle is allowed to be Emissions Tested (Smog Checked) is that
the vehicle does not have any Diagnostic Trouble Codes present
(with the exception of PENDING Diagnostic Trouble Codes).
2. In addition to the requirement that no Diagnostic Trouble Codes be
present, some areas also require that all the Monitors that a partic-
ular vehicle supports indicate a "Has Run" status condition before
an Emissions Check may be performed.
3. Other areas may only require that some (but not all) Monitors indi-
cate a "Has Run" status before an Emissions Test (Smog Check)
may be performed.