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Home › Saturn › 2007 › Outlook XR, AWD › Repair and Diagnosis › Engine Performance › System › Engine Controls And Fuel - DTC P0340 To DTC P2138 › DTC P0351-P0356 › Circuit/System Testing

Circuit/System Testing

  1. With the engine running, observe the applicable Cylinder IC Circuit Status parameters with the scan tool.
    • If a parameter displays short Gnd/Open, test for an open/high resistance or a short to ground in the affected IC circuit. All wire circuit resistance should measure less than 2 ohms.
    • If a parameter displays short to B+, test for a short to voltage in the affected IC circuit.
  2. Connect jumper wires from the harness connector of the ICM to the corresponding terminals of the ICM.
  3. Using the jumper wires, exchange the affected IC control circuit with a known good IC control circuit. Also exchange the spark plug wires of the corresponding coils.
  4. Start the engine.
    5. IMPORTANT: An open/high resistance on the low reference circuit to the ICM may cause a misfire.
  5. Observe the Misfire Current counters with the scan tool.
    • If the misfire transfers with the suspect IC control circuit, replace the ECM.
    • If the misfire remains with the coil, replace the ICM.
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