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Home >> Chevrolet >> 2011 >> Impala Police >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls And Fuel - 3.9L - DTC P0010 Through DTC P0340 >> DTC P0340 >> Circuit/System Verification
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Circuit/System Verification

  1. With the ignition OFF, inspect the engine wiring harnesses carrying the camshaft position sensor circuits for the following conditions:
    • Close routing of secondary ignition wires
    • Close routing of aftermarket electrical equipment
    • Close to solenoids, motors, and relays
    • Correct any wire harness routing or component placement conditions, if it is determined to be a possible source of electrical interference.
  2. Start the engine. Using the Live Plot function on the scan tool, select the camshaft position parameter. Change the minimum spec to 400 RPM and the maximum spec to 4,000 RPM. Select the crankshaft position sensor parameter. Change the minimum spec to 600 RPM and the maximum spec to 3,300 RPM.
  3. Observe the scan tool.
  4. Quickly accelerate and release the accelerator pedal several times. Do not exceed 3,200 RPM. The graphed lines on the Live Plot display should track together across the screen.
    • 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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