FixVault
Home › Saturn › 2009 › Sky Red Line, Automatic › Repair and Diagnosis › Engine Performance › System › Engine Controls And Fuel - 2.0L - DTC P0010 To DTC P0238 › DTC P0090, P0091, or P0092 › Circuit/System Testing

Circuit/System Testing

  1. Ignition OFF, disconnect the harness connector at the high pressure fuel pump.
  2. Engine running, verify that a test lamp flashes between the high pressure fuel pump actuator low control circuit terminal 1 and B+.
    • If the test lamp is always ON, test the high pressure fuel pump actuator low control circuit for a short to ground. If the circuit tests normal, replace the ECM.
    • If the test lamp is always OFF, test the high pressure fuel pump actuator low control circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the ECM.
  3. Ignition ON, verify that a test lamp illuminates between the high pressure fuel pump actuator high control circuit terminal 2 and ground.
    • If the test lamp does not illuminate, test the high pressure fuel pump actuator high control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the ECM.
  4. If all circuits test normal, test or replace the high pressure fuel pump.
About FixVault