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Home >> Pontiac >> 2003 >> Aztek AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 191 (Engine Controls Self-Diagnostics - 2.2L Bi-Fuel) >> Diagnostic Tests >> DTC P1209: Fuel Injector Control Module PWM Output Signal Failure >> Diagnostic Procedure
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Diagnostic Procedure

WARNING: This page is about a different car, the 2003 Chevrolet Cavalier. 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 (Alternative Fuels). If yes, go to next step. If no, go to DIAGNOSTIC SYSTEM CHECK - ENGINE CONTROLS (ALTERNATIVE FUELS)  under SELF-DIAGNOSTIC SYSTEM.
  2. Observe the FICM diagnostic circuit status using a scan tool. Does the scan tool display FAULT? If yes, go to step  4. If no, go to next step.
  3. Observe the Freeze Frame and/or the Failure records data for this DTC. Turn the ignition switch to OFF position for 30 seconds. Start the engine. Operate the vehicle within the Conditions for Running the DTC. CONDITIONS FOR RUNNING THE DTC . You may also operate the vehicle within the conditions that you observed from the Freeze Frame and/or the Failure records data. Does the DTC fail this ignition cycle? If yes, go to next step. If no, see INTERMITTENTS in TROUBLE SHOOTING - 2.2L CAVALIER - BI-FUEL - CNG/GASOLINE article.
  4. Turn ignition switch to OFF position. Disconnect the PCM harness connector C1. Turn ignition switch to RUN position, engine OFF. Measure the voltage from the FICM diagnostic output PWM circuit using a DMM. Does the DMM display the voltage at 5 volts? If yes, go to step  11. If no, go to next step.
  5. Is the voltage more than 5.3 volts? If yes, go to step  10. If no, go to next step.
  6. Turn ignition switch to OFF position. Disconnect the FICM harness connector. Turn ignition switch to RUN position, engine OFF. Probe the FICM ignition voltage circuit using a test light connected to a good ground. Does the test light illuminate? If yes, go to next step. If no, go to step  13.
  7. Probe the FICM battery voltage circuit using a test light connected to a good ground. Does the test light illuminate? If yes, go to next step. If no, go to step  14.
  8. Probe the FICM ground circuits using a test light connected to battery voltage. Does the test light illuminate for each circuit? If yes, go to next step. If no, go to step  15.
  9. Check the FICM diagnostic output PWM circuit for an open or a short to ground. Did you find and correct the condition? If yes, go to step  18. If no, go to step  12.
  10. Check the FICM diagnostic output PWM circuit for a short to voltage. Did you find and correct the condition? If yes, go to step  18. If no, go to step  17.
  11. Check the PCM harness connectors for proper terminal contact. Did you find and correct the condition? If yes, go to step  18. If no, go to step  16.
  12. Check the FICM harness connector for proper terminal contact. Did you find and correct the condition? If yes, go to step  18. If no, go to step  17.
  13. Repair the open or short to ground in the FICM ignition voltage circuit. After repair, go to step  18.
  14. Repair the open or short to ground in the FICM battery voltage circuit. Did you complete the repair? After repair, go to step  18.
  15. Repair the open in the FICM ground circuit. Did you complete the repair? After repair, go to step  18.
  16. Replace the PCM. See POWERTRAIN CONTROL MODULE under COMPUTERIZED ENGINE CONTROLS in REMOVAL & INSTALLATION - CAVALIER & SUNFIRE article. Program PCM with correct vehicle software and calibration. After repair, go to step  18.
  17. Replace the FICM. After repair, go to next step.
  18. Clear the DTCs using a scan tool. Turn ignition switch to OFF position for 30 seconds. Turn ignition switch to RUN position, engine OFF. Operate the vehicle within the Conditions for Running the DTC. See CONDITIONS FOR RUNNING THE DTC . You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records. Did the DTC fail this ignition? If yes, go to step  2. If no, go to next step.
  19. Observe the CAPTURE INFO using a scan tool. Are there any DTCs that have not been diagnosed? If yes, see DIAGNOSTIC TROUBLE CODE DEFINITIONS . If no, system is okay at this time.
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