Crankshaft Position Sensor System Variation Learn Procedure
CAUTION:
Before performing crankshaft position system variation learn procedure, always set parking brake and block drive wheels in order to prevent personal injury. Release throttle immediately when engine starts to decelerate in order to eliminate over-revving engine. Once learn procedure has been completed, control module will return engine control to operator and engine will respond to throttle position.
NOTE:
Battery must be fully charged and in good condition. Scan tool connection at Data Link Connector (DLC) should be clean and tight before starting crankshaft position system variation learn procedure.
- Close hood.
- Block drive wheels and set vehicle parking brake.
- Put vehicle in Park or Neutral.
- Turn all accessories off.
- Connect a scan tool.
- Start and run engine until engine is at normal operating temperature 165°F (74°C) on 2.2L or 185°F (85°C) on 2.4L.
- With engine still running, use scan tool to enable CRANKSHAFT POSITION SYSTEM VARIATION LEARNING PROCEDURE.
- Press and hold brake pedal firmly and raise engine speed to specified value of 3920 RPM, releasing throttle as soon as engine cuts out.
- Using scan tool, verify that crankshaft variation has been learned.