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Diagnostic Test

WARNING: This page is about a different variant/trim than selected.
  1. ACTIVE DIAGNOSTIC TROUBLE CODE (DTC) 
    1. Crank the engine.
    2. Ignition on, engine not running.
    3. With the scan tool, read the active DTCs.

      Is the DTC Active at this time?

      Yes 

      • Go To  2.

      No 

      • Go To  14.
  2. (F855) 5-VOLT SUPPLY CIRCUIT 
    Fig 1: Measuring For Voltage At 5-Volt Supply Circuit At CKP Sensor Harness Connector
    GC0149901Courtesy of CHRYSLER GROUP, LLC
    1. Turn the ignition off.
    2. Disconnect the CKP Sensor harness connector.
    3. Ignition on, engine not running.
    4. Measure the voltage on the (F855) 5-volt Supply circuit in the CKP Sensor harness connector.

      Is the voltage between 4.8 and 5.2 volts?

      Yes 

      • Go To  3.

      No 

      • Go To  10.
  3. (K24) CKP SIGNAL CIRCUIT 
    Fig 2: Checking CKP Signal Circuit
    GC0149896Courtesy of CHRYSLER GROUP, LLC
    1. Measure the voltage on the (K24) CKP Signal circuit in the CKP Sensor harness connector.
      NOTE:

      The sensor voltage should be approximately 5.0 volts (plus or minus 0.1 volt) with the connector disconnected.

      Is the voltage as described above?

      Yes 

      • Go To  4.

      No 

      • Go To  7.
  4. (K925) SENSOR GROUND CIRCUIT OPEN 
    Fig 3: Checking Sensor Ground Circuit For Open
    GC0149897Courtesy of CHRYSLER GROUP, LLC
    1. Turn the ignition off.
    2. Disconnect the PCM C2 harness connector.
    3. Measure the resistance of the (K925) Sensor ground circuit from the CKP Sensor harness connector to the PCM C2 harness connector.

      Is the resistance below 5.0 Ohms?

      Yes 

      • Go To  5.

      No 

  5. (K24) CKP SIGNAL CIRCUIT SHORTED TO THE (F855) 5-VOLT SUPPLY CIRCUIT 
    Fig 4: Checking CKP Signal Circuit For Short To 5 Volt Supply Circuit
    GC0149898Courtesy of CHRYSLER GROUP, LLC
    1. Measure the resistance between the (K24) CKP Signal circuit and the (F855) 5-volt Supply circuit in the CKP Sensor harness connector.

      Is the resistance below 5.0 Ohms?

      Yes 

      • Repair the short between the (K24) CKP Signal circuit and the (F855) 5-volt Supply circuit.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .

      No 

      • Go To  6.
  6. CRANKSHAFT POSITION SENSOR 
    NOTE:

    Inspect the slots on the flywheel for damage. If a problem is found repair as necessary.

    Repair 

    • Verify that there is good pin to terminal contact in the Crank Position Sensor and Powertrain Control Module harness connectors. Replace the Crank Position Sensor if no problems were found with the connectors. Refer to SENSOR, CRANKSHAFT POSITION, REMOVAL .
    • Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
  7. (K24) CKP SIGNAL CIRCUIT SHORTED TO VOLTAGE 
    Fig 5: Checking CKP Signal Circuit
    GC0149896Courtesy of CHRYSLER GROUP, LLC
    1. Turn the ignition off.
    2. Disconnect the PCM C2 harness connector.
    3. Ignition on, engine not running.
    4. Measure the voltage on the (K24) CKP Signal circuit in the CKP Sensor harness connector.

      Is there any voltage present?

      Yes 

      • Repair the short to voltage in the (K24) CKP Signal circuit.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .

      No 

      • Go To  8.
  8. (K24) CKP SIGNAL CIRCUIT OPEN 
    Fig 6: Checking CKP Signal Circuit For Open
    GC0149899Courtesy of CHRYSLER GROUP, LLC
    1. Turn the ignition off.
    2. Measure the resistance of the (K24) CKP Signal circuit from the CKP Sensor harness connector to the PCM C2 harness connector.

      Is the resistance below 5.0 Ohms?

      Yes 

      • Go To  9.

      No 

  9. (K24) CKP SIGNAL CIRCUIT SHORTED TO GROUND 
    Fig 7: Checking CKP Signal Circuit For Short To Ground
    GC0149900Courtesy of CHRYSLER GROUP, LLC
    1. Measure the resistance between ground and the (K24) CKP Signal circuit in the CKP Sensor harness connector.

      Is the resistance below 5.0 Ohms?

      Yes 

      • Repair the short to ground in the (K24) CKP Signal circuit.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .

      No 

      • Go To  13.
  10. (F855) 5-VOLT SUPPLY CIRCUIT SHORTED TO VOLTAGE 
    Fig 8: Measuring For Voltage At 5-Volt Supply Circuit At CKP Sensor Harness Connector
    GC0149901Courtesy of CHRYSLER GROUP, LLC
    1. Turn the ignition off.
    2. Disconnect the PCM C2 harness connector.
    3. Ignition on, engine not running.
    4. Measure the voltage on the (F855) 5-volt Supply circuit in the CKP Sensor harness connector.

      Is there any voltage present?

      Yes 

      • Repair the short to voltage in the (F855) 5-volt Supply circuit.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .

      No 

      • Go To  11.
  11. (F855) 5-VOLT SUPPLY CIRCUIT OPEN 
    Fig 9: Checking 5-Volt Supply Circuit For Open
    GC0149903Courtesy of CHRYSLER GROUP, LLC
    1. Turn the ignition off.
    2. Measure the resistance of the (F855) 5-volt Supply circuit from the CKP Sensor harness connector to the PCM C2 harness connector.

      Is the resistance below 5.0 Ohms?

      Yes 

      • Go To  12.

      No 

  12. (F855) 5-VOLT SUPPLY CIRCUIT SHORTED TO GROUND 
    Fig 10: Checking 5-Volt Supply Circuit For Short To Ground
    GC0149902Courtesy of CHRYSLER GROUP, LLC
    1. Measure the resistance between ground and the (F855) 5-volt Supply circuit in the CKP Sensor harness connector.

      Is the resistance below 100 Ohms?

      Yes 

      • Repair the short to ground in the (F855) 5-volt Supply circuit.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .

      No 

      • Go To  13.
  13. POWERTRAIN CONTROL MODULE (PCM) 
    1. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the related Sensor and the Powertrain Control Module (PCM).
    2. Look for any chafed, pierced, pinched or partially broken wires.
    3. Look for broken, bent, pushed out or corroded terminals. Verify that there is good pin to terminal contact in the related Sensor and the Powertrain Control Module connectors.
    4. Perform any Technical Service Bulletins that may apply.

      Were there any problems found?

      Yes 

      No 

  14. ERRATIC CKP SENSOR SIGNAL 
    1. Turn the ignition off.
    2. With a lab scope back probe 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 may result in possible serious or fatal injury.

    3. Ignition on, engine not running.
    4. Wiggle the related wire harness and lightly tap on the Crank Position Sensor.
    5. Observe the lab scope screen.
    6. Look for any pulses generated by the CKP Sensor.
    7. Allow the engine to idle.
    8. Observe the lab scope screen.

      Did the CKP Sensor generate any erratic pulses?

      Yes 

      • Verify that there is good pin to terminal contact in the Crank Position Sensor and Powertrain Control Module connectors. Replace the Crank Position Sensor if no issues were found with the connectors. Refer to SENSOR, CRANKSHAFT POSITION, REMOVAL .
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .

      No 

      • Go To  15.
  15. ERRATIC CMP SIGNAL 
    1. Turn the ignition off.
    2. With a lab scope back probe the (K44) Cam Position Sensor (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 may result in possible serious or fatal injury.

    3. Ignition on, engine not running.
    4. Wiggle the related wire harness and lightly tap on the Cam Position Sensor.
    5. Observe the lab scope screen.
    6. Look for any pulses generated by the CMP Sensor.
    7. Allow the engine to idle.
    8. Observe the lab scope screen.
      NOTE:

      On multiple CMP sensor engines repeat this test for the other signal circuits

      Did the CMP Sensor generate any pulses?

      Yes 

      • Verify that there is good pin to terminal contact in the CMP Sensor and Powertrain Control Module connectors. Replace the Camshaft Position Sensor if no issues were found with the connectors. Refer to SENSOR, CAMSHAFT POSITION, REMOVAL .
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .

      No 

      • Test complete, the conditions that set this DTC are not present at this time. Perform the INTERMITTENT CONDITION diagnostic procedure for further assistance. Refer to .
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