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Circuit/System Testing

WARNING: This page is about a different car, the 2010 Saturn Outlook, 2010 GMC Acadia, 2010 Chevrolet Traverse, and 2010 Buick Enclave. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition OFF, remove the fuse that supplies voltage to terminal 5-X2 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 5-X2 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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