Diagnostic Test

1. Turn the ignition on.
2. With the scan tool select the "Phonic Wheel Reset" procedure under PCM Miscellaneous Menu Option and follow the on screen instructions.
   NOTE:

   If a negative response is displayed after the "Phonic Wheel Reset" procedure is performed, start the engine and perform the "Phonic Wheel Reset" procedure over until the misfire monitor is cleared.

   Did the PCM complete the "Phonic Wheel Reset" procedure?

   Yes 

   • Go To  2

   No 

   • Perform the process over until the "Phonic Wheel Reset" procedure is completed.

1. Turn the ignition off.
2. Turn the ignition on, engine not running.
3. With the scan tool, erase all DTCs.
4. Start the engine and allow it to idle.
5. With the scan tool, read DTCs and record on the repair order.

   Is the DTC active or pending?

   Yes 

   • Go To  3

   No 

   • Repair is complete.

1. Turn the ignition off.
2. Visually inspect the Crankshaft Position (CKP) Sensor wire harness. Look for any chafed, pierced, pinched, or partially broken wires.
3. Visually inspect the CKP Sensor wire harness connectors. Look for broken, bent, pushed out, or corroded terminals.
4. Verify that there is good pin to terminal contact in the Crank Position Sensor and Powertrain Control Module connectors.
5. Ensure that the CKP Sensor is properly installed and the mounting bolt(s) are torqued to the proper specification.

   Were any of the above conditions present?

   Yes 

   • Repair as necessary.
   • Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .

   No 

   • Go To  4

1. Remove the Crankshaft Position Sensor. Refer to SENSOR, CRANKSHAFT POSITION, REMOVAL AND INSTALLATION .
2. Inspect the Target Wheel/Flex Plate for damage, foreign material, or excessive movement.

   Were any problems found?

   Yes 

   • Repair or replace the Target Wheel/Flex Plate as necessary. The "Phonic Wheel Reset" Procedure must be performed every time there has been a repair/replacement made to a CMP Sensor and/or CKP Sensor, Flywheel, valvetrain, Timing Chain or gears. Failure to do so can cause a misfire fault to set. With the scan tool, perform the "Phonic Wheel Reset" Procedure.  .
   • Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .

   No 

   • Go To  5

If there are no possible causes remaining, view repair.

Repair 

• Replace the Crankshaft Position Sensor in accordance with the Service Information. Refer to SENSOR, CRANKSHAFT POSITION, REMOVAL AND INSTALLATION . The "Phonic Wheel Reset" Procedure must be performed every time there has been a repair/replacement made to a CMP Sensor and/or CKP Sensor, Flywheel, valvetrain, Timing Chain or gears. Failure to do so can cause a misfire fault to set. With the scan tool, perform the "Phonic Wheel Reset" Procedure.  .
• Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .