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HOMESERVICE MANUALSCHEVROLET2001CAVALIER LS, 2.4 TREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 38 (ENGINE CONTROLS SELF-DIAGNOSTICS - 5.7L CORVETTE)DIAGNOSTIC TESTSDTC P0351-P0358: IGNITION CONTROL CIRCUITDIAGNOSTIC PROCEDURES
2001 Chevrolet Cavalier LS, 2.4 T

Diagnostic Procedures

2001 Chevrolet Cavalier LS, 2.4 TSECTION Diagnostic Procedures
WARNING: This page is about a different car, the 2002 Chevrolet Corvette. However, it is still accessible from the selected car via links, so may be relevant.
  1. Did you perform the Diagnostic System Check-Engine Controls? If yes, go to next step. If no, see DIAGNOSTIC SYSTEM CHECK - ENGINE CONTROLS  under SELF-DIAGNOSTIC SYSTEM.
  2. Observe the Freeze Frame/Failure Records data for this DTC. Turn OFF the ignition for 30 seconds. Start the engine. Operate the vehicle within the Conditions for Running DTC, or as closely as possible to the Freeze Frame/Failure Records. Does the DTC fail this ignition cycle? If yes, go to next step. If no, see INTERMITTENT CONDITIONS  under SELF-DIAGNOSTIC SYSTEM.
  3. Turn OFF the engine. Disconnect the respective ignition coil electrical connector. Start the engine. Measure the frequency at the ignition control circuit using the Digital Multimeter (DMM) set to DC Hertz. Is the frequency 3-20 Hz? If yes, go to step  7. If no, go to next step.
  4. Measure the voltage at the ignition control circuit using the DMM. Is the voltage more than 1 V? If yes, go to step  13. If no, go to next step.
  5. Turn OFF the ignition. Disconnect the PCM connector. Test the continuity from the ignition control circuit at the ignition coil electrical connector to the PCM connector using the DMM. Does the DMM indicate continuity? If yes, go to next step. If no, go to step  14.
  6. Test the respective IC circuit for a short to ground. Did you find and correct the condition? If yes, go to step  17. If no, go to step  15.
  7. Turn ON the ignition, with the engine OFF. Probe the ignition 1 voltage circuit of the ignition coil with a test lamp connected to battery ground. Does the test lamp illuminate? If yes, go to next step. If no, go to step  9.
  8. Probe the ground circuit of the ignition coil with a test lamp connected to battery voltage. Does the test lamp illuminate? If yes, go to step  11. If no, go to step  10.
  9. Repair the open in the ignition 1 voltage circuit. After repairs, go to step  17.
  10. Repair the open in the ground circuit for the ignition coil. After repairs, go to step  17.
  11. Inspect for poor connections at the harness connector of the ignition coil. Did you find and correct the condition? If yes, go to step  17. If no, go to next step.
  12. Replace the ignition coil. After repairs, go to step  17.
  13. Repair the IC circuit for a short to voltage. After repairs, go to step  17.
  14. Repair the IC circuit for an open circuit. After repairs, go to step  17.
  15. Inspect for poor connections at the harness connector of the PCM. Did you find and correct the condition? If yes, go to step  17. If no, go to next step.
  16. Replace the PCM. See appropriate REMOVAL, OVERHAUL & INSTALLATION article. Reprogram PCM. See POWERTRAIN CONTROL MODULE  under PROGRAMMING. After repairs, go to next step.
  17. Clear the DTCs with a scan tool. Turn OFF the ignition for 30 seconds. Start the engine. Operate the vehicle within the Conditions for Running DTC. Does the DTC run and pass? If yes, go to next step. If no, go to step  2.
  18. Observe the stored information, Capture Info with a scan tool. Does the scan tool display any DTCs that you have not diagnosed? If yes, see DIAGNOSTIC TROUBLE CODE DEFINITIONS . If no, system is okay.
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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.