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Home >> Jeep >> 2004 >> Grand Cherokee Freedom, 4.0 S, RWD >> Repair and Diagnosis >> Engine Performance >> System >> Powertrain Diagnostic Procedures >> System Description And Functional Operation >> Function Operation >> Skim On-Board Diagnostic
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Skim On-Board Diagnostic

The SKIM has been programmed to transmit and monitor many different coded messages as welll as PCM Bus messages. This monitoring is called "On-Board Diagnosis".

Certain criteria must be met for a diagnostic trouble code to be entered into the DKIM memory. The criteria may be a range of Input voltage, PCI Bus message, or coded messages to the SKIM. If all of the criteria for monitoring a circuit or function are met and a fault is sensed, a diagnostic trouble code will be stored in the SKIM memory.