2007 Chrysler Truck PT Cruiser L4-2.4L VIN X Vehicle > ALL Diagnostic Trouble Codes ( DTC ) > Testing and Inspection > P Code Charts > P0344 GAS P0344-CAMSHAFT POSITION SENSOR INTERMITTENT https://my.alldata.com/repair/#/repair/article/55125/component/3926/itype/423/nonstandard/1175627 1/17
For a complete wiring diagram refer to Diagrams/Electrical. - When Monitored: https://my.alldata.com/repair/#/repair/article/55125/component/3926/itype/423/nonstandard/1175627 2/17
While cranking the engine and engine running. - Set Condition: When the failure counter reaches 20. One Trip Fault. Three good trips to turn off the MIL. Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Diagnostic Test 1. ACTIVE DTC Ignition on, engine not running. With a scan tool, read DTCs. https://my.alldata.com/repair/#/repair/article/55125/component/3926/itype/423/nonstandard/1175627 3/17
Is the DTC active at this time? - Go To 2 - Refer to the INTERMITTENT CONDITION Diagnostic Procedure. See: Computers and Control Systems > Component Tests and General Diagnostics > Intermittent Condition 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? - Go To 3 https://my.alldata.com/repair/#/repair/article/55125/component/3926/itype/423/nonstandard/1175627 4/17
- Go To 8 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? - Repair as necessary. - Go To 4 4. (F855) 5-VOLT SUPPLY CIRCUIT OPEN OR SHORTED TO GROUND https://my.alldata.com/repair/#/repair/article/55125/component/3926/itype/423/nonstandard/1175627 5/17
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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. https://my.alldata.com/repair/#/repair/article/55125/component/3926/itype/423/nonstandard/1175627 7/17
Is the voltage between 4.5 and 5.2 volts? - Go To 5 - Repair the open or short to ground in the (F855) 5-volt Supply circuit. Use Miller special tool #8815 when checking for an open circuit to prevent PCM harness connector terminal damage. 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? - Repair or replace the Tone Wheel/Pulse Ring as necessary. - Go To 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. https://my.alldata.com/repair/#/repair/article/55125/component/3926/itype/423/nonstandard/1175627 8/17
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? - Replace the Crank Position Sensor. - Go To 7 7. CAMSHAFT POSITION SENSOR If there are no possible causes remaining, view repair. Repair - Replace the Camshaft Position Sensor. https://my.alldata.com/repair/#/repair/article/55125/component/3926/itype/423/nonstandard/1175627 9/17
8. (K44) CMP SIGNAL CIRCUIT SHORTED TO BATTERY VOLTAGE Turn the ignition off. https://my.alldata.com/repair/#/repair/article/55125/component/3926/itype/423/nonstandard/1175627 10/17
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? - Repair the short to battery voltage in the (K44) CMP Signal circuit. - Go To 9 9. (K44) CMP SIGNAL CIRCUIT OPEN https://my.alldata.com/repair/#/repair/article/55125/component/3926/itype/423/nonstandard/1175627 11/17
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 #8815 to perform diagnosis. https://my.alldata.com/repair/#/repair/article/55125/component/3926/itype/423/nonstandard/1175627 12/17
Measure the resistance in the (K44) CMP Signal circuit from the CMP harness connector to the appropriate terminal of special tool #8815. Wiggle the related wire harness while taking this measurement. Is the resistance below 5.0 ohms? - Go To 10 - Repair the excessive resistance in the (K44) CMP Signal circuit. 10. (K44) CMP SIGNAL CIRCUIT SHORTED TO GROUND https://my.alldata.com/repair/#/repair/article/55125/component/3926/itype/423/nonstandard/1175627 13/17
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? https://my.alldata.com/repair/#/repair/article/55125/component/3926/itype/423/nonstandard/1175627 14/17
- Repair the short to ground in the (K44) CMP Signal circuit. - Go To 11 11. (K44) CMP SIGNAL CIRCUIT SHORTED TO THE (F855) 5-VOLT SUPPLY CIRCUIT https://my.alldata.com/repair/#/repair/article/55125/component/3926/itype/423/nonstandard/1175627 15/17
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? https://my.alldata.com/repair/#/repair/article/55125/component/3926/itype/423/nonstandard/1175627 16/17
- Repair the short between the (F855) 5-volt Supply circuit and the (K44) CMP Signal circuit. - Go To 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? - Repair as necessary. - Replace and program the Powertrain Control Module. https://my.alldata.com/repair/#/repair/article/55125/component/3926/itype/423/nonstandard/1175627 17/17