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Home >> Chevrolet >> 2001 >> 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. If powertrain diagnostic system check was performed, go to next step. If powertrain diagnostic system check was not performed, go to POWERTRAIN DIAGNOSTIC SYSTEM CHECK  under DIAGNOSTIC SYSTEM CHECKS. After performing powertrain diagnostic system check, go to next step.
  2. Using scan tool, observe FREEZE FRAME/FAILURE RECORDS for this DTC. Turn ignition off for 30 seconds. Start engine. Operate vehicle within the conditions for running the DTC or within the parameters observed in FREEZE FRAME/FAILURE RECORDS. If DTC fails this ignition cycle, go to next step. If DTC does not fail this ignition cycle, go to DIAGNOSTIC AIDS .
  3. Turn ignition off. Disconnect PCM connector. Turn ignition on. Using a test light connected to battery voltage, probe PCM connector C1 terminal No. 48 (Red/Black wire). See Figure. If test light illuminates, go to step  6. If test light does not illuminate, go to next step.
  4. Check for open in Red/Black wire between PCM connector C1 terminal No. 48 and ICM connector terminal "L". Repair as necessary. After repairs, go to step  6. If circuit is okay, go to next step.
  5. Check for poor terminal connections at ICM. Repair as necessary. After repairs, go to next step. If connections are okay, go to step  7.
  6. Disconnect PCM connector. Connect a DVOM between PCM connector C1 terminals No. 48 (Red/Black wire) and No. 54 (White wire). Turn ignition on. Observe voltage on DVOM. If voltage is 20-40 millivolts, go to step  8. If voltage is not 20-40 millivolts, go to next step.
  7. Turn ignition off. Leave PCM connector disconnected. Disconnect ICM connector. Check for open in White wire between ICM and PCM. Repair as necessary. After repairs, go to step  12. If circuit is okay, go to step  9.
  8. Check for poor terminal connections at PCM. Repair as necessary. After repairs, go to step  12. If connections are okay, go to step  11.
  9. Check for poor terminal connections at ICM. Repair as necessary. After repairs, go to step  12. If connections are okay, go to next step.
  10. Replace ICM. After replacing module, go to step  12.
  11. Replace PCM. Perform PCM relearn procedure. See POWERTRAIN CONTROL MODULE PROGRAMMING  under PROGRAMMING. After replacing PCM, go to next step.
  12. Using scan tool, clear DTCs. Turn ignition off for at least 30 seconds. Start engine and allow it to reach normal operating temperature. Operate vehicle within conditions for setting this DTC. If scan tool indicates that this test ran and passed, go to next step. If scan tool does not indicate that this test ran and passed, go to step  2.
  13. Using scan tool, select CAPTURE INFO, REVIEW INFO function. If any undiagnosed DTCs are displayed, go to applicable DTC test. See DIAGNOSTIC TROUBLE CODE DEFINITIONS . If no undiagnosed DTCs are displayed, system is okay.
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