Equus 3150 - ABS/SRS + OBD2 Diagnostic Tool - Manual (Page 61)

Using the Code Reader
I/M READINESS TESTING
OBD2 59
2.
YELLOW LED - Determine from the CODE RETRIEVAL
PROCEDURE (page 34) 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 / countries) 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 regulations and laws of
your local area.
- Some areas require that all Monitors indicate a "Has Run"
status before they allow an Emissions Test (Smog Check) to
be performed. Other areas only require that some, but not all,
Monitors have run their self-diagnostic testing before an
Emissions Test (Smog Check) may be performed.
From the code retrieval procedure, determine the status of
each Monitor (a solid Monitor icon shows Monitor "Has Run"
status, a flashing Monitor icon indicates "Has Not Run" status).
Take this information to an emissions professional to
determine (based on your test results) if your vehicle is ready
for an Emissions Test (Smog Check).
3.
RED LED - Indicates there is a problem
with one or more of the vehicle's systems.
A vehicle displaying a red LED is definitely
not ready for an Emissions Test (Smog
Check). The red LED is also an indication
that there are Diagnostic Trouble Code(s)
present (displayed on the Code Reader's
screen). The Multifunction Indicator
(Check Engine) Lamp on the vehicle's
instrument panel will light steady. The problem that is causing the red
LED to light must be repaired before an Emissions Test (Smog Check)
can be performed. It is also suggested that the vehicle be
inspected/repaired before driving the vehicle further.
If the Red LED was obtained, there is a definite problem present in
the system(s). In these cases, you have the following options.
„ Repair the vehicle yourself. If you are going to perform the
repairs yourself, proceed by reading the vehicle service manual
and following all its procedures and recommendations.