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Home >> Chevrolet >> 2007 >> Impala SS >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls And Fuel - 5.3L - Diagnosis & Troubleshooting >> Powertrain Relay Diagnosis >> Circuit/System Verification
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Circuit/System Verification

  1. Ignition ON, engine OFF, command the powertrain relay ON and OFF several times using the scan tool output control function. You should either hear or feel the relay click with each command.
    IMPORTANT: On the scan tool, the powertrain relay is referred to as the EC ignition relay.
  2. Ignition ON, engine OFF, with a test lamp, probe both test points of all the fuses that are powered by the powertrain relay. The test lamp should illuminate on at least one test point of each fuse.
    • If the vehicle passes the Circuit/System Verification test, then operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that are captured in the Freeze Frame/Failure Records Data list.
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