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Home › Saturn › 2010 › Sky Red Line, Automatic › Repair and Diagnosis › Engine Performance › System › Engine Controls And Fuel - 2.0L - DTC P0700 To P2544 › DTC P2105 › Circuit/System Testing

Circuit/System Testing

  1. Ignition OFF, remove the fuse that supplies voltage to terminal 5 X2 of the K20 Engine Control Module. Verify the fuse is OK.
      NOTE: This DTC will only set if the fuse is open and the circuits are not grounded. The ignition voltage circuits must be tested thoroughly for an intermittent short to ground.
    • If the fuse is open, test the ignition voltage circuit between the open fuse and the K20 Engine Control Module terminal 5 X2 for an intermittent short to ground.
  2. Install the fuse.
  3. Disconnect the harness connectors of the K20 Engine Control Module.
  4. Ignition ON, load test for B+ on the ignition circuit terminal 5 X2 of the K20 Engine Control Module connector.
    • If less than B+, repair the ignition circuit for an open/high resistance.
  5. If all circuits/connections test OK, replace the K20 Engine Control Module.
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