Introduction to On Board Diagnostics (II)
Introduction to On Board Diagnostics (II)
Introduction to On Board Diagnostics (II)
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<strong>Introduction</strong> <strong>to</strong> <strong>On</strong> <strong>Board</strong><strong>Diagnostics</strong> (<strong>II</strong>)OBD <strong>II</strong> provides additional information <strong>to</strong> technician for diagnosis is and repairof emission related problems.Item Legal Requirement Diagnostic techniquet______________________________________________________Catalytic Converter Illuminate MILDual sensors placedmoni<strong>to</strong>ring when HC conversion efficiencyat the front and rear end of thefalls <strong>to</strong> 60%converter___________________________________________________________________________Misfire moni<strong>to</strong>ring Illuminate MIL on detectingMeasure change inmisfires in predefined % of crankshaft speedmisfires in any cylinder(s) and estimate indicatedwithin 200 or 1000 revolutions <strong>to</strong>rque developed bydepending on cold starteach cylinder after(open-loop) orcombustion.closed-loop loop operation.Complicated computationsare carried out. Also identify ithe specific cylinder experiencingmisfire._______________________________________________________________________________
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