Craftsman 3100iSC Manual De Usuario

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Using the Diagnostic Tool 
 
I/M READINESS TESTING 
 
 
62 47177 
 
The diagnostic tool allows you to retrieve Monitor/System Status 
Information to help you determine if the vehicle is ready for an 
Emissions Test (Smog Check). In addition to retrieving Diagnostic 
Trouble Codes, the diagnostic 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 
vehicle 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 
particular 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 
indicate a "Has Run" status before an Emissions Test (Smog Check) 
may be performed. 
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.