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Home >> Chevrolet >> 2009 >> Traverse LS, AWD >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Control System & Fuel System - 3.6L - DTC P0638 To DTC P2635 >> DTC P2105 >> Circuit/System Testing

Circuit/System Testing

  1. Ignition OFF, remove the fuse that supplies voltage to terminal X2-5 of the ECM. 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 ECM for an intermittent short to ground.
  2. Install the fuse.
  3. Disconnect the harness connectors of the ECM.
  4. Ignition ON, load test for B+ on the ignition circuit terminal X2-5 of the ECM connector.
    • If less than B+, repair the ignition circuit for an open/high resistance.
  5. If all circuits/connections test OK, replace the ECM.
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