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DTC P0560: Testing

WARNING: This page is about a different car, the 2003 Pontiac Grand Prix. However, it is still accessible from the selected car via links, so may be relevant.
  1. Did you perform the DIAGNOSTIC SYSTEM CHECK - ENGINE ELECTRICAL? If so, go to next step. If not, go to DIAGNOSTIC SYSTEM CHECK - ENGINE ELECTRICAL .
  2. Install a scan tool. Start the engine. Increase engine speed above 1,500 RPM. With a scan tool, observe the IGNITION 1 SIGNAL parameter in the PCM data list. Does the scan tool indicate that the Ignition 1 Signal parameter is greater than the specified range of 11.0V? If so, go to step  6. If not, go to next step.
  3. Compare the battery voltage at the battery with the ignition 1 signal parameter in the PCM data list. Is the battery voltage and PCM ignition 1 readings different by more than the value specified of 0.7V? If so, go to next step. If not, go to TEST A: CHARGING SYSTEM TEST in GENERATORS & REGULATORS article under ELECTRICAL.
  4. Test the battery positive voltage circuit of the PCM for a high resistance. Did you find and correct the condition? If so, go to step  7. If not, go to next step.
  5. Inspect for poor connections at the harness connector of the PCM. Did you find and correct the condition? If so, go to step  7. If not, go to next step.
  6. Replace the PCM. See POWERTRAIN CONTROL MODULE in REMOVAL & INSTALLATION article under ENGINE PERFORMANCE. After replacement is complete, go to next step.
  7. Review and record the scan tool Fail Records data. Use the scan tool in order to clear the DTC. Operate the vehicle within the Conditions for Running the DTC as specified in the supporting text. See CONDITIONS FOR RUNNING THE DTC . Using the scan tool, observe the SPECIFIC DTC INFORMATION for DTC P0560 until the test runs. Does the scan tool indicate that DTC P0560 failed this ignition? If so, go to step  2. If not, then system is okay.
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