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Home › Saturn › 2008 › Sky Red Line, Standard › Repair and Diagnosis › Engine Performance › System › Engine Controls And Fuel - 2.0L - DTC P0243 To DTC P0690 › DTC P0351-P0354 › Circuit/System Testing

Circuit/System Testing

  1. Ignition OFF, disconnect the harness connector at the affected ignition coil/module.
  2. Ignition OFF for 90 seconds, disconnect the ECM connector X1.
  3. Test for less than 5.0 ohms between the ignition coil/module IC circuit terminal 3 and the appropriate ECM terminal listed below:
    • IC 1 circuit: terminal 55
    • IC 2 circuit: terminal 80
    • IC 3 circuit: terminal 79
    • IC 4 circuit: terminal 56
    • If greater than the specified range, test the IC circuit for an open/high resistance.
  4. Connect the ECM.
  5. Exchange the affected ignition coil/module with the ignition/coil module of a good cylinder.
  6. Start the engine and observe the scan tool.
    • If the DTC or the misfire transfers with the suspect ignition/coil module, replace as needed.
    • If the DTC or the misfire does not transfer with the suspect ignition/coil module, replace the ECM.
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