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Home >> Chevrolet >> 2010 >> Impala Police >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls And Fuel - 3.9L - DTC P0341 - DTC P2544 >> DTC P1682 >> Circuit/System Verification
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Circuit/System Verification

NOTE: On the scan tool, the powertrain relay is referred to as the EC ignition relay.
  1. If DTC P0685, P0689 or P0690 is set, diagnose that DTC first.
  2. Ignition ON, observe the scan tool Ignition 1 Voltage signal and the EC Ignition Relay Feedback signal parameters. There should be no more than 3 V difference between the two parameters.
  3. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.
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