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DTC P0335: Crankshaft Position Sensor Circuit: Testing

  1. Start the engine. With the DRBIII® scan tool, read the CKP SYNC State. Does the DRBIII® scan tool display CKP SYNC state IN SYNC? If yes, go to next step. If no, go to step  4.
    2. WARNING: When the engine is operating, do not stand in a direct line with the fan. Do not put your hands near the pulleys, belts or fan. Do not wear loose clothing.
  2. Turn the ignition off. With the DRBIII® lab scope probe and the Miller Special Tool (6801), backprobe the (K44) Camshaft Position (CMP) sensor signal circuit in the CMP sensor harness connector. Ignition on, engine not running. Wiggle the related wire harness and lightly tap on the CMP sensor. Observe the lab scope screen. Look for any pulses generated by the CMP sensor. Start the engine. Allow the engine to idle. Observe the lab scope screen. Did the CMP sensor generate any erratic pulses? If yes, repair as necessary. If no, go to next step.
    3. WARNING: When the engine is operating, do not stand in a direct line with the fan. Do not put your hands near the pulleys, belts or fan. Do not wear loose clothing.
  3. Turn the ignition off. With the DRBIII® lab scope probe and the Miller Special Tool (6801), backprobe the (K24) CKP signal circuit in the CKP harness connector. Ignition on, engine not running. Wiggle the related wire harness and lightly tap on the CKP sensor. Observe the lab scope screen. Look for any pulses generated by the CKP sensor. Start the engine. Allow the engine to idle. Observe the lab scope screen. Did the CKP sensor generate any pulses? If yes, repair as necessary. If no, test complete.
  4. Turn the ignition off. Disconnect the CKP sensor harness connector. Ignition on, engine not running. Measure the voltage of the (K6) 5-volt supply circuit in the CKP sensor harness connector. Is the voltage between 4.5-5.5 volts? If yes, go to next step. If no, go to step  13.
  5. Turn the ignition off. Disconnect the CKP sensor harness connector. Ignition on, engine not running. Measure the voltage of the (K24) CKP signal circuit in the CKP sensor harness connector. Is the voltage between 4.5-5.0 volts? If yes, go to next step. If no, go to step  8.
    6. CAUTION: Do not probe the PCM harness connectors. Probing the PCM harness connectors will damage the PCM terminals resulting in poor terminal to pin connection. Install Miller Special Tool (8815) to perform diagnosis.
  6. Turn the ignition off. Disconnect the CKP sensor harness connector. Disconnect the PCM harness connectors. Measure the resistance of the (K4) sensor ground circuit from the CKP sensor, harness connector to the appropriate terminal of Miller Special Tool (8815). Is the resistance below 5.0 ohms? If yes, go to next step. If no, repair the open in the (K4) sensor ground circuit.
  7. Inspect the slots on the flywheel for damage. If a problem is found repair as necessary. If there are no possible causes remaining, replace the CKP sensor.
  8. Turn the ignition off. Disconnect the CKP sensor harness connector. Disconnect the PCM harness connectors. Measure the resistance between ground and the (K24) CKP signal circuit in the CKP sensor harness connector. Is the resistance below 5.0 ohms? If yes, repair the short to ground in the (K24) CKP signal circuit. If no, go to next step.
    9. CAUTION: Do not probe the PCM harness connectors. Probing the PCM harness connectors will damage the PCM terminals resulting in poor terminal to pin connection. Install Miller Special Tool (8815) to perform diagnosis.
  9. Turn the ignition off. Disconnect the CKP sensor harness connector. Disconnect the PCM harness connectors. Measure the resistance of the (K24) CKP signal circuit from the CKP sensor harness connector to the appropriate terminal of Miller Special Tool (8815). Is the resistance below 5.0 ohms? If yes, go to next step. If no, repair the open in the (K24) CKP signal circuit.
  10. Turn the ignition off. Disconnect the CKP sensor harness connector. Reconnect the PCM harness connectors. Ignition on, engine not running. Measure the voltage of the (K24) CKP signal circuit in the CKP sensor harness connector. Is the voltage above 5.5 volts? If yes, repair the short to battery voltage in the (K24) CKP signal circuit. If no, go to next step.
  11. Turn the ignition off. Disconnect the CKP sensor harness connector. Disconnect the PCM harness connectors. Measure the resistance between the (K24) CKP signal circuit and the (K6) 5-volt supply circuit in the CKP sensor harness connector. Is the resistance below 5.0 ohms? If yes, repair the (K24) CKP signal circuit shorted to the (K6) 5-volt supply circuit. If no, go to next step.
  12. Before continuing disconnect the PCM harness connector and check the related wiring terminals for corrosion, damage or terminal push out. Repair as necessary. Pay particular attention to all power and ground circuits. If there are no possible causes remaining, replace and program the PCM. See PROGRAMMING .
  13. Turn the ignition off. Disconnect the CKP sensor harness connector. Disconnect the PCM harness connectors. Measure the resistance between ground and the (K6) 5-volt supply circuit in the CKP sensor harness connector. Is the resistance below 100 ohms? If yes, repair the short to ground in the (K6) 5-volt supply circuit. If no, go to next step.
    14. CAUTION: Do not probe the PCM harness connectors. Probing the PCM harness connectors will damage the PCM terminals resulting in poor terminal to pin connection. Install Miller Special Tool (8815) to perform diagnosis.
  14. Turn the ignition off. Disconnect the CKP sensor harness connector. Disconnect the PCM harness connectors. Measure the resistance of the (K6) 5-volt supply circuit from the CKP sensor harness connector to the appropriate terminal of Miller Special Tool (8815). Is the resistance below 5.0 ohms? If yes, go to next step. If no, repair the open in the (K6) 5-volt supply circuit.
  15. Turn the ignition off. Disconnect the CKP sensor harness connector. Reconnect the PCM harness connectors. Ignition on, engine not running. Measure the voltage on the (K6) 5-volt supply circuit in the CKP sensor harness connector. Is the voltage above 5.5 volts? If yes, repair the short to battery voltage in the (K6) 5-volt supply circuit. If no, go to next step.
  16. Before continuing disconnect the PCM harness connector and check the related wiring terminals for corrosion, damage or terminal push out. Repair as necessary. Pay particular attention to all power and ground circuits. If there are no possible causes remaining, replace and program the PCM. See PROGRAMMING .
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