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Home >> Dodge and Ram >> 2003 >> Durango Base, 5.9 Z, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 15 (Engine Controls - Self Diagnostics - 4.7L) >> Diagnostic Tests >> DTC P0340: Camshaft Position Sensor Circuit >> Testing

DTC P0340: Camshaft Position Sensor Circuit: Testing

WARNING: This page is about a different car, the 2003 Dodge Dakota. However, it is still accessible from the selected car via links, so may be relevant.
  1. Crank the engine. Ignition on, engine not running. With the DRBIII® scan tool, read DTCs and record the related freeze frame data. Is the Good Trip Counter displayed and equal to zero? If yes, go to next step. If no, go to step  14.
  2. Turn the ignition off. Disconnect the CMP sensor harness connector. Ignition on, engine not running. Measure the voltage of the (K6) 5-volt supply circuit in the CMP sensor harness connector. Is the voltage between 4.5-5.5 volts? If yes, go to next step. If no, go to step  10.
  3. Measure the voltage on the (K44) CMP signal circuit in the CMP sensor harness connector. Is the voltage between 4.5-5.0 volts? If yes, go to next step. If no, go to step  9.
    4. 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.
  4. Turn the ignition off. Disconnect the PCM harness connectors. Measure the resistance of the (K4) sensor ground circuit from the CMP sensor harness connector. Is the resistance below 5.0 ohms? If yes, go to next step. If no, repair the open in the (K4) sensor ground circuit.
  5. Inspect the camshaft sprocket for damage. If a problem is found repair as necessary. If there are no possible causes remaining, replace the CMP sensor.
  6. Turn the ignition off. Disconnect the PCM harness connectors. Ignition on, engine not running. Measure the voltage on the (K44) CMP signal circuit in the CMP sensor harness connector. Is the voltage above 5.2 volts? If yes, repair the short to voltage in the (K44) CMP signal circuit. If no, go to next step.
    7. 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.
  7. Turn the ignition off. Measure the resistance of the (K44) CMP signal circuit from the CMP 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 (K44) CMP signal circuit.
  8. Measure the resistance between ground and the (K44) CMP signal circuit in the CMP sensor harness connector. Is the resistance below 100 ohms? If yes, repair the short to ground in the (K44) CMP signal circuit. If no, go to next step.
  9. Measure the resistance between the (K44) CMP signal circuit and the (K6) 5-volt supply circuit in the CMP sensor harness connector. Is the resistance below 5.0 ohms? If yes, repair the (K44) CMP signal circuit shorted to the (K6) 5-volt supply circuit. If no, go to step  13.
  10. Turn the ignition off. Disconnect the PCM harness connectors. Ignition on, engine not running. Measure the voltage of the (K6) 5-volt supply circuit in the CMP sensor harness connector. Is the voltage above 5.3 volts? If yes, repair the short to battery voltage in the (K6) 5-volt supply circuit. If no, go to next step.
    11. 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.
  11. Turn the ignition, off. Measure the resistance of the (K6) 5-volt supply circuit between the CMP sensor harness connector and the appropriate terminal of Miller Special Tool (8815) terminal. 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.
  12. Measure the resistance between ground and the (K6) 5-volt supply circuit in the CMP 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.
    13. NOTE: Before continuing, disconnect the PCM harness connectors and check the related wiring terminals for corrosion, damage or terminal push out. Repair as necessary.
  13. Using the wiring diagram as a guide, inspect the wire harness and connectors. Visually inspect the related wire harness. Look for any chafed, pierced, pinched, or partially broken wires. Visually inspect both the component and the PCM connectors. Pay particular attention to all power and ground circuits. If there are no possible causes remaining, replace and program the PCM. See PROGRAMMING .
    14. 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.
  14. 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 sensor harness connector. Ignition on, engine not running. Wiggle the related wire harness and lightly tap the CKP sensor. Observe the lab scope screen. Allow the engine to idle. Observe the lab scope screen. Did the CKP sensor generate any erratic pulses? If yes, replace the CKP sensor. If no, go to next step.
    15. 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.
  15. Turn the ignition off: With the DRBIII® lab scope probe and the Miller Special Tool (6801), backprobe the (K44) CMP 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. Allow the engine to idle. Observe the lab scope screen. Did the CMP sensor generate any erratic pulses? If yes, replace the CMP sensor. If no, test complete.
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