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Crankshaft Position System Variation Learn

Note: The Crankshaft Position System Variation Learn procedure is required when the following service procedures have been performed, regardless of whether DTC P0315 is set:

Note: The ECM monitors certain component signals to determine if all the conditions are met to continue with the Crankshaft System Position Variation Learn procedure.

1. Vehicle in Service Mode, observe the DTC information with a scan tool. Verify no other DTCs are set, except DTCs P0300-P0304, or P0315.

⇒	If DTCs are set, except DTCs P0300-P0304, or P0315, refer to Diagnostic Trouble Code (DTC) List - Vehicle for further diagnosis.

Note: To ensure the battery pack has sufficient state of charge to get Crankshaft Position Variation Learn values with the lowest engine noise present, this procedure should be performed when the Hybrid/EV Battery Pack Charge Remaining parameter is at least 40%.

2. Select the Crankshaft Position Variation Learn procedure with a scan tool and perform the following:

2.1.	Block drive wheels.

2.2.	Set parking brake.

2.3.	DO NOT apply brake pedal.

2.4.	Turn the air conditioning (A/C) OFF.

2.5.	When directed, apply and hold brake pedal for the duration of the procedure.

2.6.	Vehicle ON, engine running at operating temperature.

2.7.	The vehicle must remain in Park or Neutral.

Note: The ECM controls the engine speed during the Crankshaft Position System Variation Learn procedure.

2.8.	Tap and release the accelerator pedal to start the Crankshaft Position Variation Learn procedure.

3. The scan tool displays Learn In Progress.
4. The scan tool displays Learn Successful.
5. Verify DTC P0315 ran and passed This Ignition Cycle.

⇒	If DTC P0315 failed or did not run This Ignition Cycle, or another DTC is present, refer to Diagnostic Trouble Code (DTC) List - Vehicle for further diagnosis.

6. Once the Crankshaft Position System Variation Learn procedure has successfully completed, and in order to store the crankshaft position system variation values in the ECM, turn OFF the vehicle and verify all vehicle systems are OFF. This may take up to 2 minutes.