1997 Cadillac Eldorado BaseFACTORY OEM SERVICE PROCEDURE

Ignition System

  1. Perform On-Board Diagnostic (OBD) System Check. See ON-BOARD DIAGNOSTIC (OBD) SYSTEM CHECK  . After performing OBD system check, go to next step.
  2. If Diagnostic Trouble Code (DTC) P0231, P0232, P0322, P0601, P0602, P1376, P1631, P1632 or P1634 is present, diagnose DTC(s) first. See the TESTS W/CODES article. If DTC(s) are not present, go to next step.
  3. Check all PCM power and ground connections and circuits. Repair as necessary. After repairs, go to step 6). If connections and circuits are okay, go to next step.
  4. Check ignition system. Repair as necessary. After repairs, go to step 6). If ignition system is okay, go to next step.
  5. Check fuel system. Go to FUEL SYSTEM or BASIC FUEL SYSTEM CHECKS  . Repair as necessary. After repairs, go to next step. If fuel system is okay, go to step 7).
  6. Start engine. If engine starts, perform ON-BOARD DIAGNOSTIC (OBD) SYSTEM CHECK  . If engine still does not start, go to next step.
  7. Check for engine mechanical condition causing a no-start condition. Check timing chain and valve timing. Repair as necessary. After repairs, perform ON-BOARD DIAGNOSTIC (OBD) SYSTEM CHECK  . Fuel System (Fuel Metering System)
Factory Service Tools

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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.

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