Chart C3 - CCDIC Display Reads System Problem
You are at this chart because the CCDIC display reads SYSTEM PROBLEM. This symptom is the result of a data link problem.
NOTE:
Test numbers refer to test numbers on diagnostic chart.
Test Number 1) This checks if data link or the CCDIC panel is faulty.
Test Number 2) This checks where problem exists in data link, including the CCDIC panel.
Test Number 3) If the ALDL cover does not provide a good jumper between pin "L" and "M", an open will develop in the data line circuit. If the jumper is good, the problem is in the CCDIC.