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Home › Saturn › 2007 › Sky Red Line, Automatic › Repair and Diagnosis › Engine Performance › System › Engine Controls & Fuel - 2.0L - DTC P0326 To P2096 › DTC P2090 or P2091 › Circuit/System Testing

Circuit/System Testing

  1. Ignition ON, measure for battery voltage between the CMP actuator solenoid ignition voltage and ground.
    • If less than battery voltage, test the CMP actuator solenoid ignition voltage circuit for an open, short to ground. If the circuit tests normal, replace the control module.
  2. Connect a test lamp between the CMP actuator solenoid control circuit and a battery voltage. The test lamp should not illuminate.
    • If the test lamp illuminates, test the CMP actuator solenoid control circuit for a short to voltage. If the circuit tests normal, replace the control module.
  3. Measure for 0 volts between the CMP actuator solenoid control and ground.
    • If voltage is present, test the control circuit for a short to voltage. If the circuit tests normal, replace the control module.
  4. Command each CMP actuator solenoid ON. The test lamp should turn ON and OFF.
    • If the test lamp does not turn ON and OFF, test the CMP actuator solenoid control circuit for an open or high resistance. If the circuit tests normal, replace the control module.
  5. If all circuits test normal, test or replace the CMP actuator solenoid.
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