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Home >> Chevrolet >> 2007 >> Optra5 LS, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls And Fuel - 1.8L (LDA) >> Diagnostic Information and Procedures >> Intake Manifold Tuning Valve Diagnosis >> Circuit/System Verification

Circuit/System Verification

  1. Engine running, verify that DTC P0660 is not set.
  2. 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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