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OBD2 Systems
I/M READINESS TESTING
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
Diagnostic Trouble Code(s) present
(displayed on the CanOBD2&1 Scan
Tool's
screen).
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.
Take the vehicle to a professional to have it serviced. The
problem(s) causing the red LED to light must be repaired before
the vehicle is ready for an Emissions Test (Smog Check).
Using the I/M Readiness Monitor Status to Confirm a Repair
The I/M Readiness Monitor Status function can be used (after repair of a
fault has been performed) to confirm that the repair has been performed
correctly, and/or to check for Monitor Run Status. Use the following
procedure to determine I/M Readiness Monitor Status:
44
indication
that
The
Malfunction
there
are
CanOBD2&1
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