Mike's Workshop Manuals: Service manuals for every vehicle
Home >> Chevrolet >> 2009 >> HHR SS, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls And Fuel - 2.0L - DTC P2088 To DTC P2544 >> DTC P2090 or P2091 >> Circuit/System Testing

Circuit/System Testing

  1. Ignition ON, measure for battery voltage between the CMP actuator solenoid ignition voltage terminal A and ground.
    • If less than battery voltage, test the CMP actuator solenoid ignition voltage circuit for an open or a short to ground.
  2. Connect a test lamp between the CMP actuator solenoid control circuit terminal B and battery voltage. The test lamp should not illuminate.
    • If the test lamp illuminates, test the CMP actuator solenoid control circuit for a short to ground. If the circuit tests normal, replace the control module.
  3. Measure for 0 volts between the CMP actuator solenoid control terminal B 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 the 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.
scientia non olet · About Mike's Workshop Manuals