Circuit/System Testing
- Test the 5-volt reference circuit of the CKP sensor for an intermittent condition.
- Test the low reference circuit for an intermittent condition.
- Test the CKP sensor signal circuit for an intermittent condition.
- Test for an intermittent and for a poor connection at the ECM.
- Test for an intermittent and for a poor connection at the CKP sensor.
- Remove the CKP sensor.
- Inspect the CKP sensor for the following conditions:
- Physical damage
- Excessive play or looseness
- Improper installation
- Foreign material passing between the CKP sensor and the reluctor wheel
- Electromagnetic interference in the CKP sensor circuits
- Inspect the CKP reluctor wheel for the following conditions:
- Physical damage
- Excessive end play or looseness
- Improper installation
- If all circuits and components test normal, replace the CKP sensor.