Cutlass V6-191 3.1L VIN M SFI (1998)
compensating values and complete the procedure.
1. Set the parking brake.
2. Block the drive wheels.
3. Ensure the hood is closed.
4. Start the engine and allow engine coolant temperature to reach at least 70°C (156°F).
5. Turn OFF the ignition switch.
6. Select and enable the crankshaft position variation learn procedure with the scan tool.
7. Start the vehicle.
8. Apply and hold the brake pedal firmly.
9. Ensure the transaxle is in park.
10. Increase accelerator pedal position until the fuel cutoff is reached at 5150 rpm. Immediately release the accelerator pedal after fuel cutoff is
reached.
11. The crankshaft position system variation compensating values are learned when the rpm decreases back to idle. If the procedure terminates.
12. Observe DTC status for DTC P1336.
13. If the scan tool indicates that DTC P1336 ran and passed, the crankshaft position system variation learn procedure is complete. If the scan tool
indicates DTC P1336 failed or not run, check for other DTCs. If no DTCs other than P1336 are set, repeat the crankshaft position system variation
learn procedure as necessary.
