Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Chart C-3, CCDIC Display Reads System Problem
1991 Cadillac Seville STSSECTION Chart C-3, 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.
- This checks if data link or the CCDIC panel is faulty.
- This checks where problem exists in data link, including the CCDIC panel.
- 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.
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.