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.
1988 Cadillac Seville BaseFACTORY OEM SERVICE PROCEDURE
Chart B3 - CCDIC Problem
You are at this chart because odometer problem has been isolated to CCDIC components or related data link circuitry.
NOTE:
Test numbers refer to test numbers on diagnostic chart.
- This step restores circuit No. 800E into data link circuit. If odometer reads zero, the circuit is shorted to ground or voltage.
- This step restores circuit No. 800C into data link circuit. If odometer continues to read correct mileage, the CCDIC must be replaced. If zeros return to the IPC, circuit No. 800C is at fault.
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.
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.