Saturn - 2.2L
- Start engine and allow ECT to reach more than 158°F (70°C).
- Turn A/C off and place transaxle in Park or Neutral.
- Using scan tool, perform CRANKSHAFT POS. VARIATION LEARN procedure.
Procedure requires accelerator to be depressed to wide open throttle and then released. PCM will cut fuel off at speeds more than 4000 RPM and will allow engine to decelerate. PCM will learn crankshaft as engine decelerates.
If PCM will not learn crankshaft, see EXCESSIVE CRANKSHAFT VARIATION SYMPTOM table for diagnostic aids.
EXCESSIVE CRANKSHAFT VARIATION SYMPTOM
| Scan Tool Display | Possible Causes |
|---|---|
| Factors Out Of Range | Reluctor Wheel Machining Quality, Run Out, Incorrect Air Gap |
| Opposing Factors Out Of Range | Disturbance Or Noise In Crank Sensor Circuit |
| Sum Out Of Range | Engine Too Cold |
| Crank Pulse Count Error | CKP Or CMP Sensor DTC Set |