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Home >> Chevrolet >> 2007 >> Impala SS >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls And Fuel - 5.3L - DTC P0443 To DTC P3449 >> DTC P1682 >> Circuit/System Verification
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Circuit/System Verification

  1. If DTCs P0685, P0689, or P0690 are set, diagnose those DTCs first.
    IMPORTANT: On the scan tool, the powertrain relay is referred to as the EC ignition relay.
  2. Ignition ON, engine OFF, observe both the Ignition 1 Voltage signal and the EC Ignition Relay Feedback signal parameters on the scan tool. Both parameter values should display no more than 3 volts difference between the 2 parameters.
    • If the vehicle passes the Circuit/System Verification test, 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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