P1391

Tests 554 - 559:

Tests 560 - 564:

Tests 565 - 568:

SYMPTOM
P1391 - INTERMITTENT LOSS OF CMP OR CKP

WHEN MONITORED
During engine running.

SET CONDITION
When the expected cam signal level disagrees with the actual cam signal level.

POSSIBLE CAUSES
- Damaged crankshaft
- Damaged target magnet
- Wiring harness intermittent defect
- Intermittent CMP signal loss when wiring is wiggled
- Intermittent CKP signal loss when wiring is wiggled
- Irregular LAB scope pattern of CKP signal
- Irregular LAB scope pattern of CMP signal
- Sensor connector/wiring defective
- CMP sensor defective
- CKP sensor defective