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Using the Diagnostic Tool
I/M READINESS TESTING
54 Craftsman 87702
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 successfully.
Monitors with a "Has Not Run" status have not yet met the
conditions they need to perform diagnosis and testing 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
determine 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
33, 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
normally (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 33) 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.
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