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Home >> Chevrolet >> 2002 >> Impala Base, 3.4 E >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System Self-Diagnostics - 3.4L >> Diagnostic Tests >> DTC P1352: Ic Output High/Pulse Detected >> Diagnostic Procedures

Diagnostic Procedures

  1. Perform diagnostic system check - engine controls. See DIAGNOSTIC SYSTEM CHECK - ENGINE CONTROLS  under SELF-DIAGNOSTIC SYSTEM. After performing diagnostic system check - engine controls, go to next step.
  2. Observe the Freeze Frame/Failure Records data for the DTC. Turn OFF ignition for 30 seconds. Start the engine. Operate the vehicle within the Conditions for Running the DTC or as close to the Freeze Frame/Failure Records data that you observed. See CONDITIONS FOR RUNNING DTC . Does the DTC fail this ignition? If yes, go to next step. If no, go to INTERMITTENT CONDITIONS  under SELF-DIAGNOSTIC SYSTEM.
  3. Turn ignition off. Disconnect the PCM. Turn ON the ignition. Probe the low reference circuit with a test light connected to battery positive voltage. Does the test light illuminate? If yes, go to step  6. If no, go to next step.
  4. Inspect the low reference circuit for an open. Did you find and correct the condition? If yes, go to step  6. If no, go to next step.
  5. Inspect for poor connections at the IC module. Did you find and correct the condition? If yes, go to next step. If no, go to step  7.
  6. Turn ignition off. Disconnect the PCM. Connect DMM between the IC control and low reference circuits. Turn ON the ignition. Probe the IC timing signal circuit with a test light connected to battery positive voltage. Does the resistance measure greater than 5000 ohms? If yes, go to step  8. If no, go to next step.
  7. Turn ignition off. Leave the PCM disconnected. Disconnect the IC module connector. Test for an open in the IC timing signal circuit. Did you find and correct the condition? If yes, go to step  12. If no, go to step  9.
  8. Inspect 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. Inspect for poor terminal connections at the IC module. Did you find and correct the condition? If yes, go to step  12. If no, go to next step.
  10. Replace the IC module. After repairs, go to step  12.
  11. Replace PCM. Perform PCM relearn procedure. See POWERTRAIN CONTROL MODULE  under PROGRAMMING. After replacing PCM, go to next step.
  12. Use the scan tool in order to clear the DTCs. Turn ignition off for 30 seconds. Start the engine. Operate the vehicle within the Conditions for Running the DTC. See CONDITIONS FOR RUNNING DTC . Does the DTC run and pass? If yes, go to next step. If no, go to step  2.
  13. Using scan tool, observe stored information and Capture Info. 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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