Equus 3120 - OBD 2&1 Tool Kit - Manual (Page 35)

OBD2 & 1 33
E
OBD2 Systems
I/M READINESS TESTING
Monitors with a "Has Run" status indicate that all the
required conditions they needed to perform diagnosis
and testing of their assigned engine area (system) have
been met, and all diagnostic testing has completed suc-
cessfully.
Monitors with a "Has Not Run" status have not yet met
the conditions they need to perform diagnosis and test-
ing of their assigned engine area (system), and have not
been able to perform diagnostic testing on that system.
The green, yellow and red LEDs provide a quick way to help you deter-
mine if a vehicle is ready for an Emissions Test (Smog Check). Follow
the instructions below to perform the Quick Check.
Perform the Code Retrieval Procedure as described on page 23,
then interpret the LED indications as follows:
Interpreting I/M Readiness Test Results
1. GREEN LED - Indicates that all engine
systems are "OK" and operating nor-
mally (all Monitors supported by the
vehicle have run and performed their
self-diagnostic testing). The vehicle is
ready for an Emissions Test (Smog
Check), and there is a good possibility
that it can be certified.
2. YELLOW LED - Determine from the Code Retrieval Procedure
(page 23) which of the two possible conditions is causing the yellow
LED to light.
■ If a "PENDING" Diagnostic Trouble
Code is causing the yellow LED to
light, it is possible that the vehicle will
be allowed to be tested for emissions
and certified. Currently, most areas
(states) will allow an Emissions Test
(Smog Check) to be performed if the
only code in the vehicle's computer is
a "PENDING" Diagnostic Trouble
Code.
■ If the illumination of the Yellow LED is
being caused by monitors that “have
not run” their diagnostic testing, then
the issue of the vehicle being ready
for an Emissions Test (Smog Check)
depends on the emissions regula-
tions and laws of your local area.