Cruze

Crankshaft Position System Variation Learn

Note: If the crankshaft position variation learn procedure has not learned, a false misfire could be detected and DTC P0300 00 may set. If sent here from DTC P0300 00, proceed with the crankshaft position variation learn procedure.

1. Install a scan tool.
2. Monitor the ECM for DTCs with a scan tool. If other DTCs are set, except DTC P0300 00, or DTC P0315 00, refer to Diagnostic Trouble Code (DTC) List - Vehicle for the applicable DTC that set.
3. With a scan tool, select the Crankshaft Position System Variation Learn procedure and perform the following:

3.1.	Observe the fuel cut-off for the applicable engine.

3.2.	Block the drive wheels.

3.3.	Set the parking brake.

3.4.	Place the vehicle's transmission in Park or Neutral.

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

3.6.	Cycle the ignition from OFF to ON.

3.7.	Apply and hold the brake pedal for the duration of the procedure.

3.8.	Start and idle the engine.

3.9.	Accelerate to wide open throttle (WOT). The engine should not accelerate beyond the calibrated fuel cut-off RPM value noted in step 3.1. Release the throttle immediately if the value is exceeded.

Note: While the learn procedure is in progress, release the throttle immediately when the engine starts to decelerate. The engine control is returned to the operator and the engine responds to throttle position after the learn procedure is complete.

3.10.

Release the throttle when fuel cut-off occurs.

3.11.

Accelerate to wide open throttle (WOT). The engine should not accelerate beyond the calibrated fuel cut-off RPM value noted in step 3.1. Release the throttle immediately if the value is exceeded.

Note: While the learn procedure is in progress, release the throttle immediately when the engine starts to decelerate. The engine control is returned to the operator and the engine responds to throttle position after the learn procedure is complete.

4. The scan tool displays Learn Status: Learned this Ignition. If the scan tool indicates that DTC P0315 00 ran and passed, the crankshaft position sensor variation learn procedure is complete. If the scan tool indicates DTC P0315 00 failed or did not run, refer to DTC P0315 . If any other DTCs set, refer to Diagnostic Trouble Code (DTC) List - Vehicle for the applicable DTC that set.
5. Turn OFF the ignition for 30 s after the learn procedure is completed successfully.

The crankshaft position variation learn procedure is also required when the following service procedures have been performed, regardless of whether or not DTC P0315 00 is set: