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Home >> Chrysler >> 2006 >> PT Cruiser Base, 2D Convertible, Standard >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> 2.4L Engine - DTCS P0335 To P0508 >> Diagnosis And Testing >> P0344-Camshaft Position Sensor Intermittent >> Diagnostic Test

Diagnostic Test

  1. 1)  ACTIVE DTC 

    Ignition on, engine not running.

    With a scan tool, read DTCs.

    Is the DTC active at this time? 

    Yes 

    1. Go To  2).

    No 

    1. Refer to the INTERMITTENT CONDITION diagnostic procedure.
    2. Perform the POWERTRAIN VERIFICATION TEST. (Refer to STANDARD PROCEDURE - POWERTRAIN VERIFICATION TEST) .
  2. 2)  CHECKING CAMSHAFT POSITION SENSOR SIGNAL WITH A LAB SCOPE 

    Turn the ignition off.

    With a lab scope probe and the Miller special tool #6801, backprobe the (K44) CMP Signal circuit in the CMP harness connector.

    WARNING: When the engine is operating, do not stand in direct line with the fan. Do not put your hands near the pulleys, belts, or fan. Do not wear loose clothing. Failure to follow these instructions can result in personal injury or death.

    Ignition on, engine not running.

    Observe the lab scope screen.

    Start the engine.

    Observe the lab scope screen.

    Are there any irregular or missing signals? 

    Yes 

    1. Go To  3).

    No 

    1. Go To  8).
  3. 3)  WIRE HARNESS INSPECTION 

    Turn the ignition off.

    Visually inspect the related wire harness including the ground circuit. Look for any chafed, pierced, pinched, or partially broken wires.

    Visually inspect the related wire harness connectors. Look for broken, bent, pushed out, or corroded terminals.

    Make sure the Crankshaft Position Sensor and the Camshaft Position Sensor are properly installed and the mounting bolt(s) are torqued to the proper specification.

    Refer to any TSBs that may apply.

    Were any of the above conditions present? 

    Yes 

    1. Repair as necessary.
    2. Perform the POWERTRAIN VERIFICATION TEST. (Refer to STANDARD PROCEDURE - POWERTRAIN VERIFICATION TEST) .

    No 

    1. Go To  4).
  4. 4)  (F855) 5-VOLT SUPPLY CIRCUIT OPEN OR SHORTED TO GROUND 
    Fig 1: MEASURING RESISTANCE OF THE 5-VOLT SUPPLY CIRCUIT
    GC0041647Courtesy of DAIMLERCHRYSLER CORP.
    Fig 2: MEASURING RESISTANCE BETWEEN GROUND AND THE 5-VOLT SUPPLY CIRCUIT
    GC0041648Courtesy of DAIMLERCHRYSLER CORP.

    Disconnect the CMP Sensor connector.

    Ignition on, engine not running.

    Measure the voltage on the (F855) 5-volt Supply circuit in the CMP harness connector.

    Is the voltage between 4.5 and 5.2 volts? 

    Yes 

    1. Go To  5).

    No 

    1. Repair the open or short to ground in the (F855) 5-volt Supply circuit. Use Miller special tool No. 8815 when checking for an open circuit to prevent PCM harness connector terminal damage.
    2. Perform the POWERTRAIN VERIFICATION TEST. (Refer to STANDARD PROCEDURE - POWERTRAIN VERIFICATION TEST) .
  5. 5)  TONE WHEEL/PULSE RING INSPECTION 

    Turn the ignition off.

    Carefully disconnect the Battery Ground cable.

    Remove the Camshaft Position Sensor.

    Inspect the Tone Wheel/Pulse Ring for damage, foreign material, or excessive movement.

    Were any problems found? 

    Yes 

    1. Repair or replace the Tone Wheel/Pulse Ring as necessary.
    2. Perform the POWERTRAIN VERIFICATION TEST. (Refer to STANDARD PROCEDURE - POWERTRAIN VERIFICATION TEST) .

    No 

    1. Go To  6).
  6. 6)  CHECKING CRANKSHAFT POSITION SENSOR SIGNAL WITH A LAB SCOPE 
    NOTE: An intermittent condition in the Crank Position Sensor can cause the P0344 to set.

    Install the CMP Sensor and connect the Battery cable.

    With a lab scope probe and the Miller special tool #6801, backprobe the (K24) CKP Signal circuit in the CKP harness connector.

    WARNING: When the engine is operating, do not stand in direct line with the fan. Do not put your hands near the pulleys, belts, or fan. Do not wear loose clothing. Failure to follow these instructions can result in personal injury or death.

    Ignition on, engine not running.

    Wiggle the related wire harness and lightly tap on the Crank Position Sensor.

    Observe the lab scope screen.

    Start the engine.

    Observe the lab scope screen.

    Are there any irregular or missing signals? 

    Yes 

    1. Replace the Crank Position Sensor.
    2. Perform the POWERTRAIN VERIFICATION TEST. (Refer to STANDARD PROCEDURE - POWERTRAIN VERIFICATION TEST) .

    No 

    1. Go To  7).
  7. 7)  CAMSHAFT POSITION SENSOR 

    If there are no possible causes remaining, view repair. 

    Repair 

    1. Replace the Camshaft Position Sensor.
    2. Perform the POWERTRAIN VERIFICATION TEST. (Refer to STANDARD PROCEDURE - POWERTRAIN VERIFICATION TEST) .
  8. 8)  (K44) CMP SIGNAL CIRCUIT SHORTED TO BATTERY VOLTAGE 
    Fig 3: MEASURING VOLTAGE ON THE CMP SIGNAL CIRCUIT
    GC0041649Courtesy of DAIMLERCHRYSLER CORP.

    Turn the ignition off.

    Disconnect the CMP Sensor connector.

    Disconnect the PCM harness connectors.

    Ignition on, engine not running.

    Measure the voltage on the (K44) CMP Signal circuit.

    Wiggle the related wire harness while taking this measurement.

    Does the voltage ever increase above 5.2 volts? 

    Yes 

    1. Repair the short to battery voltage in the (K44) CMP Signal circuit.
    2. Perform the POWERTRAIN VERIFICATION TEST. (Refer to STANDARD PROCEDURE - POWERTRAIN VERIFICATION TEST) .

    No 

    1. Go To  9).
  9. 9)  (K44) CMP SIGNAL CIRCUIT OPEN 
    Fig 4: MEASURING RESISTANCE ON THE CMP SIGNAL CIRCUIT
    GC0041650Courtesy of DAIMLERCHRYSLER CORP.

    Turn the ignition off.

    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 No. 8815 to perform diagnosis.

    Measure the resistance in the (K44) CMP Signal circuit from the CMP harness connector to the appropriate terminal of special tool No. 8815.

    Wiggle the related wire harness while taking this measurement.

    Is the resistance below 5.0 ohms? 

    Yes 

    1. Go To  10).

    No 

    1. Repair the excessive resistance in the (K44) CMP Signal circuit.
    2. Perform the POWERTRAIN VERIFICATION TEST. (Refer to STANDARD PROCEDURE - POWERTRAIN VERIFICATION TEST) .
  10. 10)  (K44) CMP SIGNAL CIRCUIT SHORTED TO GROUND 
    Fig 5: MEASURING RESISTANCE BETWEEN GROUND AND THE CMP SIGNAL CIRCUIT
    GC0041651Courtesy of DAIMLERCHRYSLER CORP.

    Measure the resistance between ground and the (K44) CMP Signal circuit in the CMP Sensor harness connector.

    Wiggle the related wire harness while monitoring the resistance value.

    Does the resistance ever go below 100 ohms? 

    Yes 

    1. Repair the short to ground in the (K44) CMP Signal circuit.
    2. Perform the POWERTRAIN VERIFICATION TEST. (Refer to STANDARD PROCEDURE - POWERTRAIN VERIFICATION TEST) .

    No 

    1. Go To  11).
  11. 11)  (K44) CMP SIGNAL CIRCUIT SHORTED TO THE (F855) 5-VOLT SUPPLY CIRCUIT 
    Fig 6: MEASURING RESISTANCE BETWEEN THE CMP SIGNAL CIRCUIT AND 5-VOLT SUPPLY CIRCUIT
    GC0041652Courtesy of DAIMLERCHRYSLER CORP.

    Measure the resistance between the (F855) 5-volt Supply circuit and the (K44) CMP Signal circuit in the CMP harness connector.

    Wiggle the related wire harness while taking this measurement.

    Is the resistance below 5.0 ohms? 

    Yes 

    1. Repair the short between the (F855) 5-volt Supply circuit and the (K44) CMP Signal circuit.
    2. Perform the POWERTRAIN VERIFICATION TEST. (Refer to STANDARD PROCEDURE - POWERTRAIN VERIFICATION TEST) .

    No 

    1. Go To  12).
  12. 12)  PCM 
    NOTE: Before continuing, check the PCM harness connector terminals for corrosion, damage, or terminal push out. Repair as necessary.

    Using the schematics as a guide, inspect the wire harness and connectors. Pay particular attention to all Power and Ground circuits.

    Were there any problems found? 

    Yes 

    1. Repair as necessary.
    2. Perform the POWERTRAIN VERIFICATION TEST. (Refer to STANDARD PROCEDURE - POWERTRAIN VERIFICATION TEST) .

    No 

    1. Replace and program the Powertrain Control Module in accordance with the Service Information. Refer to MODULE-POWERTRAIN CONTROL and STANDARD PROCEDURE - PCM/ECM/SKREEM PROGRAMMING .
    2. Perform the POWERTRAIN VERIFICATION TEST. (Refer to STANDARD PROCEDURE - POWERTRAIN VERIFICATION TEST) .
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