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Home › Cadillac › 2009 › DTS 4.6 9 › Repair and Diagnosis › Engine Performance › System › Engine Control System & Fuel System - 4.6L - DTC P0016 To DTC P0336 › DTC P0336 › Circuit/System Verification

Circuit/System Verification

  1. Ignition OFF, inspect the engine wiring harness carrying the CKP sensor circuits for the following conditions:
    • 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. Observe the Engine Speed parameter with the scan tool. The parameter should display the current engine speed matching the CMP Sensor parameter.
    • If the Engine Speed parameter displays a value other than the current engine speed, continue with Circuit/System Testing.
  3. With the engine running, observe the CKP Active Counter parameter with the scan tool. The counter should increment from 0-255 and over again as the CKP sensor pulses are counted.
    • If the CKP Active Counter displays a value of 0, or a fixed value, continue with Circuit/System Testing.
  4. Turn OFF the ignition for 60 seconds.
  5. Start the engine. Do not cycle the ignition until this test is completed.
  6. Operate the vehicle in various operating conditions within the Conditions for Running the DTC and observe the CKP Resync Counter parameter with the scan tool. The CKP Resync Counter should remain at 0 counts.
    • If the CKP Resync Counter increments, continue with Circuit/System Testing.
  7. Engine running, observe the DTC information with a scan tool. DTC P0336 should not set.
  8. 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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