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DTC P0560: System Voltage

  1. If engine electrical diagnostic system check was performed, go to next step. If engine electrical diagnostic system check was not performed, go to ENGINE ELECTRICAL DIAGNOSTIC SYSTEM CHECK  under SELF-DIAGNOSTIC SYSTEM.
  2. Connect scan tool to Data Link Connector (DLC). Turn ignition switch to RUN position. Using scan tool, observe ignition 1 signal parameter from PCM data list. If scan tool ignition 1 signal parameter is less than 9-16 volts, go to next step. If scan tool ignition 1 signal parameter is 9-16 volts or more, go to step  6.
  3. Using scan tool, compare ignition 0 parameter with ignition 1 signal parameter from PCM data list. If readings differ by greater than 0.5 volt, go to next step. If readings differ by less than 0.5 volt, go to TEST A: CHARGING SYSTEM TEST  under SYSTEM TESTS.
  4. Test PCM battery positive voltage circuit for high resistance. See POWER DISTRIBUTION and GROUND DISTRIBUTION articles in WIRING DIAGRAMS. If no problem exists, go to next step. If problem exists, repair circuit as necessary and then go to step  7.
  5. Inspect PCM harness connector for poor connections. If no problem exists, go to next step. If problem exists, repair circuit as necessary and then go to step  7.
  6. Replace PCM. After replacement, reprogram PCM. See BODY CONTROL MODULES - AZTEK article in ACCESSORIES & EQUIPMENT. After repairs are made, go to next step.
  7. Review and record scan tool fail records data. Using scan tool, clear DTCs. Operate vehicle at less than 25 MPH with engine speed greater than 1000 RPM. Using scan tool, observe specific DTC information for DTC P0560 until test runs. If scan tool indicates DTC P0560 passed this ignition, system is okay. If scan tool indicates DTC P0560 failed this ignition, go to step  2.
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