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Diagnostic Fault Information

DIAGNOSTIC FAULT INFORMATION CHART

Circuit Short to Ground Open/High Resistance Short to Voltage Signal Performance
Low Speed GMLAN Serial Data 1 2(1) 1 -
Ground (DLC, Terminal 5) - 1(1) - -
  1. No communication on any low speed GMLAN module
  2. No communication on a specific low speed GMLAN module
(1) An open between the data link connector (DLC) and SP 200, or DLC pin 5 ground will only effect the communication with the scan tool. See DIAGNOSTIC AIDS .
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