LEMON Manuals: Even more car manuals for everyone
Home >> Chevrolet >> 2002 >> Camaro Base, 2D Convertible, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System Self-Diagnostics - 3.8L >> Diagnostic Tests >> DTC P1351: Pcm Detects Open In Ignition Control Circuit >> Diagnostic Procedures

Diagnostic Procedures

  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 for this DTC. Turn OFF the ignition for 30 seconds. Start the engine. Operate the vehicle within the Conditions for Running DTC, or within the parameters observed in 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 ignition. Disconnect the PCM. Turn ON the ignition. Probe the low reference circuit with a test lamp connected to battery voltage. Does the test lamp illuminate? If yes, go to step  6. If no, go to next step.
  4. Check low reference circuit for open. Did you find and correct the condition? If yes, go to step  12. If no, go to next step.
  5. Check for poor terminal connections at ICM. Did you find and correct the condition? If yes, go to step  12. If no, go to step  7.
  6. Disconnect the PCM. Connect the DMM between the IC and low reference circuits. Turn ON the ignition. Observe the voltage value on the DMM. Does the voltage measure 20-40 mV? If yes, go to step  8. If no, go to next step.
  7. Turn OFF the ignition. Leave the PCM disconnected. Disconnect the ICM connector. Test for an open in the IC control circuit. Did you find and correct the condition? If yes, go to step  12. If no, go to step  9.
  8. Test for poor terminal connections at the PCM. Did you find and correct the condition? If yes, go to step  12. If no, go to step  11.
  9. Test for poor terminal connections at the Ignition Control Module (ICM). Did you find and correct the condition? If yes, go to step  12. If no, go to next step.
  10. Replace the ICM. See appropriate REMOVAL, OVERHAUL & INSTALLATION article. After repairs, go to step  12.
  11. Replace the PCM. See appropriate REMOVAL, OVERHAUL & INSTALLATION article. Reprogram PCM. See POWERTRAIN CONTROL MODULE  under PROGRAMMING. After repairs, go to next step.
  12. Clear the DTCs with a scan tool. Turn OFF the ignition. 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.
  13. 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.
scientia non olet · About LEMON Manuals